require 'openehr/assumed_library_types'
require 'openehr/rm/data_types/quantity'
require 'openehr/am/archetype/constraint_model'
require 'openehr/am/openehr_profile/data_types/text'
require 'openehr/am/openehr_profile/data_types/quantity'
require 'adl_helper'

module OpenEHR
  module Parser
    grammar ADLGrammar
      rule archetype 
        arch_identification
        spec:(arch_specialisation)?
        arch_concept
        lang:(arch_language)?
        desc:(arch_description)?
        arch_definition
        arch_invariant?
        arch_ontology {
          def archetype_id
            arch_identification.archetype_id
          end

          def adl_version
            arch_identification.adl_version
          end

	  def concept
	    arch_concept.value
	  end

	  def original_language
            lang.value.original_language unless lang.empty?
          end

          def translations
            lang.value.translations unless lang.empty?
          end

          def description
            desc.value unless desc.empty?
          end

          def definition
            arch_definition.value
          end

          def ontology
            arch_ontology.value
          end
        }
      end

      rule arch_identification
        head:arch_head id:V_ARCHETYPE_ID space {
	  def archetype_id
            id.value
	  end

	  def adl_version
	    head.value[:adl_version]
	  end

          def is_controlled?
            head.value[:is_controlled?]
          end
        }
      end

      rule arch_head
        SYM_ARCHETYPE m:arch_meta_data {
	  def value
            m.value
	  end
	}
      / SYM_ARCHETYPE {
          def value
            Hash.new
          end
        }
      end

      rule arch_meta_data
        '(' arch_meta_data_items ')' space {
	   def value
             arch_meta_data_items.value
           end
         }
      end

      rule arch_meta_data_items
        item:arch_meta_data_item other_item:(';' arch_meta_data_item)* {
          def value
	    v = item.value
            other_item.elements.map {|i| i.arch_meta_data_item.value}
            v
	  end
        }
      end

      rule arch_meta_data_item
        SYM_ADL_VERSION SYM_EQ ver:V_VERSION_STRING space {
	  def value
            {:adl_version => ver.value}
          end
        }
      / SYM_IS_CONTROLED space {
          def value
	    {:is_controled? => true} # if elements[0]
          end
        }
      end

      rule arch_specialisation
        SYM_SPECIALIZE arch_id:V_ARCHETYPE_ID space {
	  def specialised?
	    true if elements[0]
          end

	  def archetype_id
	    arch_id.value
	  end
        }
      end

      rule arch_concept
        SYM_CONCEPT conc:V_LOCAL_TERM_CODE_REF space {
	  def value
            conc.text_value[1..-2]
          end
	}
      end

      rule arch_language
        SYM_LANGUAGE lang:V_DADL_TEXT <ArchLanguage>
      end

      rule arch_description
        SYM_DESCRIPTION desc:V_DADL_TEXT space {
          def value
            params = desc.value
            details = { }
            params['details'].each do |lang, attrs|
              misuse = attrs['misuse']
              misuse = nil if misuse.nil? or misuse.empty?
              use = attrs['use']
              use = nil if use.nil? or use.empty?
              purpose = attrs['purpose'] || '__unknown__' # for backward compat.
              item =
                OpenEHR::RM::Common::Resource::ResourceDescriptionItem.new(
                  :language => attrs['language'],
                  :purpose => purpose,
                  :keywords => attrs["keywords"],
                  :use => use,
                  :misuse => misuse,
                  :copyright => attrs['copyright'],
                  :original_resource_uri => attrs['original_resource_uri'],
                  :other_details => attrs['other_details'])
              details[lang] = item
            end
            oc = params['other_contributors']
	    if oc.instance_of? Hash
              oc = oc.values
            end
            OpenEHR::RM::Common::Resource::ResourceDescription.new(
              :original_author => params['original_author'],
              :other_contributors => oc,
              :lifecycle_state => params['lifecycle_state'],
              :details => details,
              :resource_package_uri => params['archetype_package_uri'],
              :other_details => params['other_details'])
          end
        }
      end

      rule arch_definition
        SYM_DEFINITION definition:V_CADL_TEXT space {
          def value
            definition.value
          end
        }
      end

      rule arch_invariant
        SYM_INVARIANT V_ASSERTION_TEXT space
      end

      rule arch_ontology
        SYM_ONTOLOGY ontology:V_DADL_TEXT space {
          def value
            ao = ontology.value
            arc_term = Proc.new do |code, item|
              OpenEHR::AM::Archetype::Ontology::ArchetypeTerm.new(
                       :code => code, :items => item)
            end
            td = itemizer(ao['term_definitions'], arc_term)
            cd = ao['constraint_definitions']
            if cd
              cd = itemizer(cd , arc_term)
            end
            tb = ao['term_bindings'] || ao['term_binding']
            term_bind = Proc.new do |code, item|
              unless item.class == Array
                [item]
              else
                item
              end
            end
            if tb
              tb = itemizer(tb, term_bind)
            end
            cons_bind = Proc.new do |code, item|
	      OpenEHR::RM::DataTypes::URI::DvUri.new(:value => item)
            end
            cb = ao['constraint_bindings'] || ao['constraint_binding']
            if cb
              cb = itemizer(cb, cons_bind)
            end
            OpenEHR::AM::Archetype::Ontology::ArchetypeOntology.new(
              :primary_language => ao['primary_language'],
              :languages_available => ao['languages_available'],
              :terminologies_available => ao['terminologies_available'],
              :term_definitions => td,
              :constraint_definitions => cd,
              :term_bindings => tb,
              :constraint_bindings => cb)
          end

           def itemizer(defs, itemize)
             defs.inject({ }) do |term_defs, langs|
               lang, items = langs
               terms = items['items'].inject({ }) do |items, term|
                 code, item = term
                 item = itemize.call code, item
                 items.update Hash[code => item]
               end
               term_defs.update Hash[lang => terms]
             end
           end
        }
      end # of arch_ontology

# cADL grammar section

      rule V_CADL_TEXT
        c_complex_object '' {
          def value
            c_complex_object.value
          end
        }
      / assertions '' {
          def value
            assertions.value
          end
        }
      end

      rule c_complex_object
        head:c_complex_object_head SYM_MATCHES SYM_START_CBLOCK body:c_complex_object_body SYM_END_CBLOCK space {
          def value(node = ArchetypeNode.new)
            args = head.value
            args[:occurrences] ||= OpenEHR::AssumedLibraryTypes::Interval.new(
              :lower => 1, :upper => 1, :lower_included => true, :upper_included => true)
            node.id = args[:node_id]
            if node.root? or node.id.nil?
              args[:path] = node.path
            else
              args[:path] = node.path + '[' + node.id + ']'
            end
            args.update body.value(node)
            OpenEHR::AM::Archetype::ConstraintModel::CComplexObject.new(args)
          end
        }
      / c_complex_object_head '' {
          def value(node = ArchetypeNode.new)
            args = c_complex_object_head.value
            args[:occurrences] ||= OpenEHR::AssumedLibraryTypes::Interval.new(
              :lower => 1, :upper => 1, :lower_included => true, :upper_included => true)
            node.id = args[:node_id]
            args[:path] = node.path
            OpenEHR::AM::Archetype::ConstraintModel::CComplexObject.new(args)
          end
        }
      end

      rule c_complex_object_head
        c_complex_object_id c_occurrences {
          def value
            args = c_complex_object_id.value
            args[:occurrences] = c_occurrences.value
            args
          end
        }
      / c_complex_object_id '' {
          def value
            c_complex_object_id.value
          end
        }
      end

      rule c_complex_object_id
        ti:type_identifier lo:V_LOCAL_TERM_CODE_REF space {
          def value
            {:rm_type_name => ti.value,
             :node_id => lo.value}
          end
        }
      / ti:type_identifier space {
          def value
            {:rm_type_name => ti.value}
          end
        }
      end

      rule c_complex_object_body
        c_any '' {
          def value(node)
            Hash[:attributes => [c_any.value(node)]]
          end
        }
      / c_attributes '' {
          def value(node)
            Hash[:attributes => c_attributes.value(node)]
          end
        }
      end

      rule c_object
        c_dv_quantity '' {
          def value(node)
            c_dv_quantity.value(node)
          end
        }	   
      / c_ordinal '' {
          def value(node)
            args = c_ordinal.value
            args[:path] = node.path
            args[:rm_type_name] = 'DV_ORDINAL'
            args[:occurrences] ||= OpenEHR::AssumedLibraryTypes::Interval.new(
              :upper => 1, :lower => 1, :lower_included => true, :upper_included => true)
            OpenEHR::AM::OpenEHRProfile::DataTypes::Quantity::CDvOrdinal.new(
             args)
          end
        }
      / c_primitive_object '' {
          def value(node)
            c_primitive_object.value(node)
          end
        }
      / c_complex_object '' {
          def value(node)
            c_complex_object.value(node)
          end
        }
      / c_code_phrase '' {
          def value(node)
            c_code_phrase.value(node)
          end
        }
      / constraint_ref '' {
          def value(node)
            constraint_ref.value(node)
          end
        }
      / archetype_slot '' {
          def value(node)
            archetype_slot.value(node)
          end
        }
      / archetype_internal_ref '' {
          def value(node = nil)
            archetype_internal_ref.value(node)
          end
        }
      / V_C_DOMAIN_TYPE '' {
          def value(node = nil)
            p elemetns
          end
        }
#     / ERR_V_C_DOMAIN_TYPE
      end

      rule archetype_internal_ref
        SYM_USE_NODE type_identifier c_occurrences object_path space {
          def value(node)
            OpenEHR::AM::Archetype::ConstraintModel::ArchetypeInternalRef.new(
              :rm_type_name => type_identifier.value,
              :occurrences => c_occurrences.value,
              :path => node.path,
              :target_path => object_path.value)
          end
        }
      / SYM_USE_NODE type_identifier object_path space {
          def value(node = nil)
            OpenEHR::AM::Archetype::ConstraintModel::ArchetypeInternalRef.new(
              :rm_type_name => type_identifier.value,
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                :lower => 1, :upper => 1, :lower_included => true, :upper_included => true),
              :path => node.path,
              :target_path => object_path.value)
           end
        }
      end

      rule archetype_slot
        c_archetype_slot_head SYM_MATCHES SYM_START_CBLOCK c_includes c_excludes SYM_END_CBLOCK space {
          def value(node)
            args = c_archetype_slot_head.value(node)
            args[:includes] = c_includes.value
            args[:excludes] = c_excludes.value
            OpenEHR::AM::Archetype::ConstraintModel::ArchetypeSlot.new(args)
          end
        }
      / c_archetype_slot_head SYM_MATCHES SYM_START_CBLOCK c_includes SYM_END_CBLOCK space {
          def value(node)
            args = c_archetype_slot_head.value(node)
            args[:includes] = c_includes.value
            OpenEHR::AM::Archetype::ConstraintModel::ArchetypeSlot.new(args)
          end
        }
      / c_archetype_slot_head SYM_MATCHES SYM_START_CBLOCK c_excludes SYM_END_CBLOCK space {
          def value(node)
            args = c_archetype_slot_head.value(node)
            args[:excludes] = c_excludes.value
            OpenEHR::AM::Archetype::ConstraintModel::ArchetypeSlot.new(args)
          end
        }
      end

      rule c_archetype_slot_head
        c_archetype_slot_id white_space c_occurrences {
          def value(node)
            args = c_archetype_slot_id.value(node)
            args[:occurrences] = c_occurrences.value
            args
          end
        }
      / c_archetype_slot_id white_space {
          def value(node)
            args = c_archetype_slot_id.value(node)
            args[:occurrences] = OpenEHR::AssumedLibraryTypes::Interval.new(
              :upper => 1, :lower => 1, :lower_included => true, :upper_included => true)
            args
          end
        }
      end

      rule c_archetype_slot_id
        SYM_ALLOW_ARCHETYPE type_identifier lt:V_LOCAL_TERM_CODE_REF {
          def value(node)
            {:rm_type_name => type_identifier.value,
             :node_id => lt.value,
             :path => node.path + "[#{lt.value}]"}
          end
        }
      / SYM_ALLOW_ARCHETYPE type_identifier {
          def value(node)
            {:rm_type_name => type_identifier.value,
             :path => node.path}
          end
        }
      end

      rule c_primitive_object
        c_primitive '' {
          def value(node)
            OpenEHR::AM::Archetype::ConstraintModel::CPrimitiveObject.new(
              {:item => c_primitive.value,
               :rm_type_name => c_primitive.value.type,
               :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                 :upper => 1, 
                                 :lower => 1, 
                                 :lower_included => true, 
                                 :upper_included => true),
               :path => node.path})
          end
        }
      end

      rule c_primitive
        c_boolean '' {
          def value
            c_boolean.value
          end
        }
      / c_date_time '' {
          def value
            c_date_time.value
          end
        }
      / c_time '' {
          def value
            c_time.value
          end
        }
      / c_date '' {
          def value
            c_date.value
          end
        }
      / c_duration '' {
          def value
            c_duration.value
          end
        }
      / c_real '' {
          def value
            c_real.value
          end
        }
      / c_integer '' {
          def value
            c_integer.value
          end
        }	
      / c_string '' {
          def value
            c_string.value
          end
        }
      end

      rule c_any
        '*' space {
          def value(node)
            OpenEHR::AM::Archetype::ConstraintModel::CAttribute.new(
              :path => node.path, :rm_attribute_name => 'ANY',
              :existence => OpenEHR::AssumedLibraryTypes::Interval.new(
                :lower => 1, :upper => 1, :lower_included => true, :upper_included => true))
          end
        }
      end

      rule c_attributes
        c_attribute more_attr:(c_attribute white_space)* {
          def value(node)
            attributes.map {|c| c.value(node)}
          end

          def attributes
            [c_attribute] + more_attr.elements.map {|e| e.c_attribute}
          end
        }
      end

      rule c_attribute
        c_attr_head c_attr_body {
          def value(node)
            val = c_attr_head.value(node)
            child_node = ArchetypeNode.new(node)
            child_node.path = val.path
            val.children = c_attr_body.value(child_node)
            val
          end
        }
      end

      rule c_attr_head
        id:(V_ATTRIBUTE_IDENTIFIER) white_space c_existence c_cardinality {
          def value(node)
            if node.root?
              path = node.path + id.value
            elsif node.id
              path = node.path + "[#{node.id}]/" + id.value
            elsif
              path = node.path + '/' + id.value
            end
            OpenEHR::AM::Archetype::ConstraintModel::CMultipleAttribute.new(
             :rm_attribute_name => id.value,
             :path => path,
             :existence => c_existence.value,
             :cardinality => c_cardinality.value)
          end
        }
      / id:V_ATTRIBUTE_IDENTIFIER white_space c_existence {
          def value(node)
            if node.root?
              path = node.path + id.value
            elsif node.id
              path = node.path + "[#{node.id}]/" + id.value
            elsif
              path = node.path + '/' + id.value
            end
            OpenEHR::AM::Archetype::ConstraintModel::CSingleAttribute.new(
             :rm_attribute_name => id.value,
             :path => path,
             :existence => c_existence.value)
          end
        }
      / id:(V_ATTRIBUTE_IDENTIFIER) white_space c_cardinality {
          def value(node)
            if node.root?
              path = node.path + id.value
            elsif node.id
              path = node.path + "[#{node.id}]/" + id.value
            elsif
              path = node.path + '/' + id.value
            end
            OpenEHR::AM::Archetype::ConstraintModel::CMultipleAttribute.new(
             :rm_attribute_name => id.value,
             :path => path,
             :cardinality => c_cardinality.value)
          end
        }
      / id:(V_ATTRIBUTE_IDENTIFIER) white_space {
          def value(node)
            if node.root?
              path = node.path + id.value
            elsif node.id
              path = node.path + "[#{node.id}]/" + id.value
            elsif
              path = node.path + '/' + id.value
            end
            OpenEHR::AM::Archetype::ConstraintModel::CSingleAttribute.new(
             :rm_attribute_name => id.value, :path => path)
          end
        }
      end

      rule c_attr_body
        SYM_MATCHES SYM_START_CBLOCK c_attr_values SYM_END_CBLOCK space {
          def value(node)
            c_attr_values.value(node)
          end
        }
      end

      rule c_attr_values
        c_any '' {
          def value(node)
            [c_any.value(node)]
          end
        }
      / c_object more_co:(c_object '')* {
          def value(node)
            c_objects.map {|c| c.value(node)}
          end

          def c_objects
            [c_object] + more_co.elements.map {|e| e.c_object }
          end
        }
      end

      rule c_includes
        SYM_INCLUDE assertions {
          def value
            assertions.value
          end
        }
      end

      rule c_excludes
        SYM_EXCLUDE assertions {
          def value
            assertions.value
          end
        }
      end

      rule c_existence
        SYM_EXISTENCE SYM_MATCHES SYM_START_CBLOCK existence_spec SYM_END_CBLOCK space {
          def value
            existence_spec.value
          end
        }
      end

      rule existence_spec
        lo:V_INTEGER SYM_ELLIPSIS up:V_INTEGER {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
              :lower => lo.value, 
              :upper => up.value, 
              :lower_included => true, 
              :upper_included => true)
          end
        }
      / V_INTEGER '' {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
              :lower => V_INTEGER.value, 
              :upper => V_INTEGER.value, 
              :lower_included => true, 
              :upper_included => true)
          end
        }
      end

      rule c_cardinality
        SYM_CARDINALITY SYM_MATCHES SYM_START_CBLOCK cardinality_spec SYM_END_CBLOCK space {
          def value
            cardinality_spec.value
          end
        }
      end

      rule cardinality_spec
        occurrence_spec ';' white_space SYM_ORDERED ';' white_space SYM_UNIQUE {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_unique => true,
              :is_orderd => true)
          end
        }
      / occurrence_spec ';' white_space SYM_ORDERED {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_orderd => true)
          end
        }
      / occurrence_spec ';' white_space SYM_UNORDERD ';' white_space SYM_UNIQUE {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_unique => true,
              :is_orderd => false)
          end
        }
      / occurrence_spec ';' white_space SYM_UNORDERD {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_orderd => false)
          end
        }
      / occurrence_spec SYM_UNIQUE ';' white_space SYM_ORDERED {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_unique => true,
              :is_orderd => true)
          end
        }
      / occurrence_spec SYM_UNIQUE ';' white_space SYM_UNORDERD {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_unique => true,
              :is_ordered => false)
          end
        }
      / occurrence_spec SYM_UNIQUE {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value,
              :is_unique => true)
          end
        }
      / occurrence_spec space {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Cardinality.new(
              :interval => occurrence_spec.value)
          end
        }
      end

      rule c_occurrences
        SYM_OCCURRENCES SYM_MATCHES SYM_START_CBLOCK occurrence_spec SYM_END_CBLOCK space {
          def value
            occurrence_spec.value
          end
        }
      end

      rule occurrence_spec
        st:integer_value SYM_ELLIPSIS ed:cardinality_limit_value {
          def value
            if ed.value == '*'
              OpenEHR::AssumedLibraryTypes::Interval.new(
                 :lower => st.value,
                 :lower_included => true)
            else
              OpenEHR::AssumedLibraryTypes::Interval.new(
                :lower => st.value,
                :upper => ed.value,
                :lower_included => true, 
                :upper_included => true)
            end
          end
        }
      / cardinality_limit_value '' {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
              :lower => cardinality_limit_value.value,
              :upper => cardinality_limit_value.value,
              :lower_included => true,
              :upper_included => true)
          end
        }
      end

      rule cardinality_limit_value
        integer_value '' {
          def value
            text_value.to_i
          end
        }
      / '*' {
          def value
            '*'
          end
        }
      end

      rule c_integer
        c_integer_spec ';' white_space integer_value {
          def value
            args = c_integer_spec.value
            args[:assumed_value] = integer_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CInteger.new(args)
          end
        }
      / c_integer_spec '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CInteger.new(
              c_integer_spec.value)
          end
        }
      end

      rule c_integer_spec
        integer_list_value '' {
          def value
            {:list => integer_list_value.value}
          end
        }
      / integer_interval_value '' {
          def value
            {:range => integer_interval_value.value}
          end
        }
      / integer_value !'..' '' {
          def value
            {:list => [integer_value.value]}
          end
        }
      / occurrence_spec '' {
          def value
            {:range => occurrence_spec.value}
          end
        }
      end

      rule c_real_spec
        real_list_value '' {
          def value
            {:list => real_list_value.value}
          end
        }
      / real_interval_value '' {
          def value
            {:range => real_interval_value.value}
          end
        }
      / real_value '' {
          def value
            {:list => [real_value.value]}
          end
        }
      end

      rule c_real
        c_real_spec ';' white_space real_value {
          def value
            args = c_real_spec.value
            args[:assumed_value] = real_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CReal.new(args)
          end
        }
      / c_real_spec '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CReal.new(
              c_real_spec.value)
          end
        }
      end

      rule c_date_constraint
        date_interval_value '' {
          def value
            {:range => date_interval_value.value}
          end
        }
      / date_list_value '' {
          def value
            {:list => date_list_value.value}
          end
        }
      / date_value '' {
          def value
            {:list => [date_value.value]}
          end
        }
      / con:V_ISO8601_DATE_CONSTRAINT_PATTERN '' {
          def value
            {:pattern => con.text_value}
          end
        }
      end

      rule c_date
        c_date_constraint ';' white_space date_value {
          def value
            args = c_date_constraint.value
            args[:assumed_value] = date_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDate.new(
              args)
          end
        }
      / c_date_constraint '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDate.new(
              c_date_constraint.value)
          end
        }
      end

      rule c_time_constraint
        time_interval_value '' {
          def value
            {:range => time_interval_value.value}
          end
        }
      / time_list_value '' {
          def value
            {:list => time_list_value.value}
          end
        }
      / time_value '' {
          def value
            {:list => [time_value.value]}
          end
        }
      / tc:V_ISO8601_TIME_CONSTRAINT_PATTERN '' {
          def value
            {:pattern => tc.text_value}
          end
        }
      end

      rule c_time
        c_time_constraint ';' white_space time_value {
          def value
            args = c_time_constraint.value
            args[:assumed_value] = time_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CTime.new(
              args)
          end
        }    
      / c_time_constraint '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CTime.new(
              c_time_constraint.value)
          end
        }
      end

      rule c_date_time_constraint
        date_time_interval_value '' {
          def value
            {:range => date_time_interval_value.value}
          end
        }
      / date_time_value '' {
          def value
            {:list => [date_time_value.value]}
          end
        }
      / dtc:V_ISO8601_DATE_TIME_CONSTRAINT_PATTERN '' {
          def value
            {:pattern => dtc.text_value}
          end
        }
      end

      rule c_date_time
        c_date_time_constraint ';' white_space date_time_value {
          def value
            args = c_date_time_constraint.value
            args[:assumed_value] = date_time_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDateTime.new(
              args)
          end
        }
      / c_date_time_constraint '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDateTime.new(
              c_date_time_constraint.value)
          end
        }
      end

      rule c_duration_constraint
        duration_pattern '/' duration_interval_value '' {
          def value
            {:pattern => duration_pattern.value,
	     :range => duration_interval_value.value}
          end
        }
     / duration_pattern '' {
          def value
            {:pattern => duration_pattern.value}
          end
        }
      / duration_interval_value '' {
          def value
            {:range => duration_interval_value.value}
          end
        }
      / duration_value '' {
          def value
            {:list => [duration_value.value]}
          end
        }
      end

      rule duration_pattern
        dp:V_ISO8601_DURATION_CONSTRAINT_PATTERN '' {
          def value
            dp.text_value
          end
        }
      end

      rule c_duration
        c_duration_constraint ';' white_space duration_value '' {
          def value
            args = c_duration_constraint.value
            args[:assumed_value] = duration_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDuration.new(
              args)
          end
        }
      / c_duration_constraint '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CDuration.new(
              c_duration_constraint.value)
          end
        }
      end

      rule c_string_spec
        string_list_value ',' white_space SYM_LIST_CONTINUE {
          def value
            {:list => string_list_value.value}
          end
        }
      / string_list_value '' {
          def value
            {:list => string_list_value.value}
          end
        }
      / pat:V_REGEXP '' {
          def value
            {:pattern => pat.value}
          end
        }
      / str:V_STRING '' {
          def value
            {:list => [str.value]}
          end
        }
      end

      rule c_string
        c_string_spec white_space ';' white_space string_value {
          def value
            args = c_string_spec.value
            args[:assumed_value] = string_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CString.new(
              args)
          end
        }
      / c_string_spec '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CString.new(
              c_string_spec.value)
          end
        }
      end

      rule c_boolean_spec
        SYM_TRUE ',' white_space SYM_FALSE {
          def value
            {:true_valid => true, :false_valid => true}
          end
        }
      / SYM_TRUE white_space '' {
          def value
            {:true_valid => true, :false_valid => false}
          end
        }
      / SYM_FALSE white_space ',' white_space SYM_TRUE {
          def value
            {:true_valid => true, :false_valid => true}
          end
        }
      / SYM_FALSE white_space '' {
          def value
            {:false_valid => true, :true_valid => false}
          end
        }
      end

      rule c_boolean
        c_boolean_spec ';' white_space boolean_value {
          def value
            args = c_boolean_spec.value
            args[:assumed_value] = boolean_value.value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CBoolean.new(
              args)
          end
        }
      / c_boolean_spec '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::Primitive::CBoolean.new(
              c_boolean_spec.value)
          end
        }
      end

      rule constraint_ref
        vltcr:V_LOCAL_TERM_CODE_REF '' {
          def value(node)
            OpenEHR::AM::Archetype::ConstraintModel::ConstraintRef.new(
              :path => node.path,
              :rm_type_name => 'ConstraintRef',
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                :upper => 1, 
                                :lower => 1, 
                                :lower_included => true, 
                                :upper_included => true),
              :reference => vltcr.value)
          end
        }
      end

      rule V_REGEXP
        (('=' / '!') '~')? (('/' ('\/' / !'/' .)* '/') / ('^' (!'^' .)* '^') ) {
          def value
            text_value
          end
        }      
      end

      rule code_string
        NAMECHAR+ '' {
          def value
            text_value
          end
        }
      end

      rule code_string_list
        first:code_string more:(',' space code_string)+ space {
          def value
            codes.map {|c| c.value}
          end

          def codes
            [first] + more.elements.map {|e| e.code_string}
          end
        }
      end

      rule code_string_spec
        code_string_list '' {
          def value
            code_string_list.value
          end
        }
      / code_string '' {
          def value
            [code_string.value]
          end
          }
      end

      rule c_code_phrase
        ti:V_TERM_CODE code_string_spec ';' space code_string ']' space {
          def value(node)
            ::OpenEHR::AM::OpenEHRProfile::DataTypes::Text::CCodePhrase.new(
              :rm_type_name => 'CodePhrase',
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                :upper => 1, 
                                :lower => 1, 
                                :lower_included => true, 
                                :upper_included => true),
              :terminology_id => ti.value, :code_list => code_string_spec.value,
              :assumed_value => code_string.value,
              :path => node.path)
          end
        }
      / ti:V_TERM_CODE code_string_spec ']' space {
          def value(node)
            ::OpenEHR::AM::OpenEHRProfile::DataTypes::Text::CCodePhrase.new(
              :rm_type_name => 'CodePhrase',
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                :upper => 1, 
                                :lower => 1, 
                                :lower_included => true, 
                                :upper_included => true),
              :terminology_id => ti.value, :code_list => code_string_spec.value,
              :path => node.path)
          end
        }
      / ti:V_TERM_CODE ']' space {
          def value(node)
            ::OpenEHR::AM::OpenEHRProfile::DataTypes::Text::CCodePhrase.new(
              :rm_type_name => 'CodePhrase',
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                :upper => 1, 
                                :lower => 1, 
                                :lower_included => true, 
                                :upper_included => true),
              :terminology_id => ti.value, :code_list => [], :path => node.path)
          end
        }
      end

      rule SYM_C_DV_ORDINAL
        'C_DV_ORDINAL' space 
      end

      rule c_ordinal
        c_ordinal_spec ';' space integer_value space {
          def value
            args = c_ordinal_spec.value
            args[:assumed_value] = integer_value.value
            args
          end
        }
      / c_ordinal_spec space '' {
          def value
            c_ordinal_spec.value
          end
        }
      / SYM_C_DV_ORDINAL SYM_LT white_space SYM_GT space {
          def value
            {:list => nil}
          end
      }
      end

      rule c_ordinal_spec
        ordinal_list '' {
          def value
            {:list => ordinal_list.value}
          end
        }
      / ordinal '' {
          def value
            {:list => [ordinal.value]}
          end
        }
      end

      rule ordinal_list
        first:ordinal more:(',' space ordinal)+ {
          def value
            ordinals.map {|o| o.value}
          end

          def ordinals
            [first] + more.elements.map {|e| e.ordinal}
          end
        }
      end

      rule ordinal
        integer_value SYM_INTERVAL_DELIM vqtc:V_QUALIFIED_TERM_CODE_REF !SYM_INTERVAL_DELIM '' {
          def value
            symbol = ::OpenEHR::RM::DataTypes::Text::DvCodedText.new(
              :value => vqtc.text_value, :defining_code => vqtc.value)
            ::OpenEHR::RM::DataTypes::Quantity::DvOrdinal.new(
                :value => integer_value.value,
                :symbol => symbol)
          end
        }
      end

      rule c_dv_quantity
        SYM_C_DV_QUANTITY SYM_START_DBLOCK
        prop:property? ql:quantity_list? aqv:assumed_quantity_value?
        SYM_END_DBLOCK <CDvQuantityItems>
      / SYM_C_DV_QUANTITY SYM_START_DBLOCK
        prop:property? aqv:assumed_quantity_value? ql:quantity_list?
        SYM_END_DBLOCK <CDvQuantityItems>
      / SYM_C_DV_QUANTITY SYM_START_DBLOCK
        aqv:assumed_quantity_value? prop:property? ql:quantity_list?
        SYM_END_DBLOCK <CDvQuantityItems>
      / SYM_C_DV_QUANTITY SYM_START_DBLOCK
        aqv:assumed_quantity_value? ql:quantity_list? prop:property?
        SYM_END_DBLOCK <CDvQuantityItems>
      / SYM_C_DV_QUANTITY SYM_START_DBLOCK
        ql:quantity_list? aqv:assumed_quantity_value? prop:property?
        SYM_END_DBLOCK <CDvQuantityItems>
      / SYM_C_DV_QUANTITY SYM_START_DBLOCK
        ql:quantity_list? prop:property? aqv:assumed_quantity_value?
        SYM_END_DBLOCK <CDvQuantityItems>
      end

      rule SYM_C_DV_QUANTITY
        'C_DV_QUANTITY' space
      end

      rule property
        SYM_PROPERTY SYM_EQ SYM_START_DBLOCK
          prop:V_QUALIFIED_TERM_CODE_REF SYM_END_DBLOCK {
          def value
            prop.value
          end
        }
      end

      rule SYM_PROPERTY
        'property' space
      end

      rule quantity_list
        SYM_QUANTITY_LIST SYM_EQ SYM_START_DBLOCK
        c_quantity_items SYM_END_DBLOCK {
          def value(node)
            c_quantity_items.value(node)
          end
        }
      end

      rule assumed_quantity_value
        SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        SYM_END_DBLOCK <AssumedValueItems>
      / SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        SYM_END_DBLOCK <AssumedValueItems>
      / SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        SYM_END_DBLOCK <AssumedValueItems>
      / SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        SYM_END_DBLOCK <AssumedValueItems>
      / SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        SYM_END_DBLOCK <AssumedValueItems>
      / SYM_ASSUMED_VALUE SYM_EQ SYM_START_DBLOCK 
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK val:real_value SYM_END_DBLOCK)?      
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK val:integer_value SYM_END_DBLOCK)?        
        SYM_END_DBLOCK <AssumedValueItems>
      end

      rule SYM_QUANTITY_LIST
        'list' space
      end

      rule c_quantity_items
        c_quantity_item more_cdv:(c_quantity_item white_space)* {
          def value(node)
            quantities.map {|q| q.value(node)}
          end

          def quantities
            [c_quantity_item] + more_cdv.elements.map {|e| e.c_quantity_item}
          end
        }
      end

      rule c_quantity_item
        '[' V_STRING ']' white_space SYM_EQ SYM_START_DBLOCK
        SYM_UNITS SYM_EQ SYM_START_DBLOCK units:V_STRING SYM_END_DBLOCK
        mag:(SYM_MAGNITUDE SYM_EQ SYM_START_DBLOCK int:real_interval_value SYM_END_DBLOCK)?
        prec:(SYM_PRECISION SYM_EQ SYM_START_DBLOCK int:integer_interval_value SYM_END_DBLOCK)?
        SYM_END_DBLOCK {
          def value(node)
            magnitude, precision = nil
            magnitude = mag.int.value unless mag.empty?
            precision = prec.int.value unless prec.empty?
            OpenEHR::AM::OpenEHRProfile::DataTypes::Quantity::CQuantityItem.new(
              :path => node.path, :rm_type_name => 'DvQuantity',
              :occurrences => OpenEHR::AssumedLibraryTypes::Interval.new(
                                :upper => 1, 
                                :lower => 1, 
                                :lower_included => true, 
                                :upper_included => true),
              :units => units.value,
              :magnitude => magnitude, :precision => precision)
          end
        }
      end

      rule SYM_UNITS
        'units' space
      end

      rule SYM_MAGNITUDE
        'magnitude' space
      end

      rule SYM_PRECISION
        'precision' space
      end

      rule SYM_ASSUMED_VALUE
        'assumed_value' space
      end

      rule V_C_DOMAIN_TYPE
        '('? [A-Z] IDCHAR* ')'? [ \n]* '<' [^>]* '>'
      end

# assertion block

      rule V_ASSERTION_TEXT
        assertions '' {
          def value
            assertions.value
          end
        }
      end

      rule assertions
        assertion more_a:(assertion '')* {
          def value
            assertions.map {|a| a.value}
          end

          def assertions
            [assertion] + more_a.elements.map {|a| a.assertion}
          end
        }
      end

      rule assertion
        id:(any_identifier ':')? boolean_expression space {
          def value
            if (id && !id.empty?)
              OpenEHR::AM::Archetype::Assertion::Assertion.new(
                :tag => id.value, :expression => boolean_expression.value,
                :string_expression => id.text_value + boolean_expression.text_value)
            else
              OpenEHR::AM::Archetype::Assertion::Assertion.new(
                :expression => boolean_expression.value,
                :string_expression => boolean_expression.text_value)
            end
          end
        }
      end

      rule boolean_expression
        boolean_node '' {
          def value
            boolean_node.value
          end
        }
      / boolean_leaf '' {
          def value
            boolean_leaf.value
          end
        }
      end

      rule boolean_node
        SYM_EXISTS absolute_path {
          def value
            item = OpenEHR::AM::Archetype::Assertion::ExprLeaf.new(
              :type => 'String',
              :item => absolute_path.value,
              :reference_type => 'CONSTANT')
            OpenEHR::AM::Archetype::Assertion::ExprUnaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_EXISTS,
              :operand => item,
              :precedence_overridden => false)
          end
        }
      / relative_path white_space SYM_MATCHES SYM_START_CBLOCK c_primitive SYM_END_CBLOCK {
          def value
            left_op = OpenEHR::AM::Archetype::Assertion::ExprLeaf.new(
                        :type => 'String',
                        :item => relative_path.value,
                        :reference_type => 'Constant')
            right_op = OpenEHR::AM::Archetype::Assertion::ExprLeaf.new(
                        :item => c_primitive.value,
                        :type => c_primitive.value.type,
                        :reference_type => 'Constant')
            op = OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_MATCHES
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => op,
              :right_operand => right_op,
              :left_operand => left_op,
              :reference_type => 'Constraint')
          end
        }
      / SYM_NOT boolean_leaf '' {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprUnaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_NOT,
              :operand => boolean_leaf.value,
              :precedence_overridden => false)
          end
        }
      / arithmetic_leaf SYM_EQ arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_EQ,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf SYM_NE arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_NE,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf SYM_LT arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_LT,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf SYM_GT arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_GT,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf SYM_LE arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_LE,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf SYM_GE arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_GE,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / boolean_leaf SYM_AND boolean_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_AND,
              :left_operand => boolean_leaf.value,
              :right_operand => boolean_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / boolean_leaf SYM_OR boolean_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_OR,
              :left_operand => boolean_leaf.value,
              :right_operand => boolean_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / boolean_leaf SYM_XOR boolean_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_XOR,
              :left_operand => boolean_leaf.value,
              :right_operand => boolean_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / boolean_leaf SYM_IMPLIES boolean_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_IMPLIES,
              :left_operand => boolean_leaf.value,
              :right_operand => boolean_expression.value,
              :reference_type => 'Constraint')
          end
        }
      end

      rule boolean_leaf
        '(' boolean_expression ')' {
          def value
            boolean_expression.value
          end
        }
      / SYM_TRUE '' {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprLeaf.new(
              :type => 'Boolean',
              :item => true,
              :reference_type => 'CONSTANT')
          end
        }
      / SYM_FALSE '' {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprLeaf.new(
              :type => 'Boolean',
              :item => false,
              :reference_type => 'CONSTANT')
          end
        }
      end

      rule arithmetic_expression
        arithmetic_node '' {
          def value
            arithmetic_node.value
          end
        }
      / arithmetic_leaf '' {
          def value
            arithmetic_leaf.value
          end
        }
      end

      rule arithmetic_node
        arithmetic_leaf '+' arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_PLUS,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf '-' arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_MINUS,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf '*' arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_MULTIPLY,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf '/' arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_DIVIDE,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      / arithmetic_leaf '^' arithmetic_expression {
          def value
            OpenEHR::AM::Archetype::Assertion::ExprBinaryOperator.new(
              :type => 'Boolean',
              :operator => OpenEHR::AM::Archetype::Assertion::OperatorKind::OP_EXP,
              :left_operand => arithmetic_leaf.value,
              :right_operand => arithmetic_expression.value,
              :reference_type => 'Constraint')
          end
        }
      end

      rule arithmetic_leaf
       '(' arithmetic_expression ')' space {
          def value
            arithmetic_expression.value
          end
        }
      / integer_value '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::ExprLeaf.new(
              :type => 'Integer',
              :item => integer_value.value,
              :reference_type => 'CONSTANT')
          end
        }
      / real_value '' {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::ExprLeaf.new(
              :type => 'Real',
              :item => real_value.value,
              :reference_type => 'CONSTANT')
          end
        }
      / absolute_path space {
          def value
            OpenEHR::AM::Archetype::ConstraintModel::ExprLeaf.new(
              :type => 'String',
              :item => absolute_path.value,
              :reference_type => 'CONSTANT')
            
          end
        }
      end

# path block
      rule object_path
        movable_path '' {
          def value
            movable_path.value
          end
	}
      / absolute_path '' {
          def value
            absolute_path.value
          end
        }
      / relative_path '' {
          def value
            relative_path.value
          end
        }
      end

      rule movable_path
         SYM_MOVABLE_LEADER relative_path '' {
           def value
             text_value
           end
         }
      end

      rule absolute_path
        '/' relative_path? '' {
           def value
             text_value
           end
         }
      end

      rule relative_path
        path_segment ('/' path_segment)* '' {
          def value
            text_value
          end
        }
      end

      rule path_segment
        V_ATTRIBUTE_IDENTIFIER V_LOCAL_TERM_CODE_REF? '' {
          def value
            text_value
          end
        }
      end

      rule SYM_MOVABLE_LEADER
        '//'
      end # of cADL grammar

# biginning of dADL grammar

      rule V_DADL_TEXT
        attr_vals space {
          def value
            attr_vals.value
          end
        }
      / complex_object_block space {
          def value
            complex_object_block.value
          end
        }
      end

      rule attr_vals
        first:attr_val second:(';'? space attr_val space)* {
          def value
            attrs.inject({ }) {|val, a| val.update a.value}
          end

          def attrs
            [first] + second.elements.map {|e| e.attr_val}
          end
        }
      end

      rule attr_val
        attr_id SYM_EQ object_block {
          def value
            {attr_id.value =>  object_block.value}
          end
        }
      end

      rule attr_id
        id:V_ATTRIBUTE_IDENTIFIER white_space {
          def value
            id.value
          end
        }
      end

      rule object_block
        complex_object_block space {
	  def value
            complex_object_block.value
          end
        }
      / primitive_object_block space {
          def value
            primitive_object_block.value
          end
        }
      end

      rule complex_object_block
        single_attr_object_block '' {
          def value
            single_attr_object_block.value
          end
        }
      / multiple_attr_object_block '' {
          def value
            multiple_attr_object_block.value
          end
        }
      end

      rule multiple_attr_object_block
        type_identifier? untyped_multiple_attr_object_block {
          def value
            untyped_multiple_attr_object_block.value
          end
        }
      end

      rule untyped_multiple_attr_object_block
        multiple_attr_object_block_head keyed_objects SYM_END_DBLOCK {
          def value
            keyed_objects.value
          end
        }
      end

      rule multiple_attr_object_block_head
        SYM_START_DBLOCK
      end

      rule keyed_objects
        keyed_object+  {
          def value
            elements.inject({ }) {|val, e| val.update e.value}
          end
        }
      end

      rule keyed_object
        object_key SYM_EQ object_block {
          def value
            {object_key.value => object_block.value}
          end
        }
      end

      rule object_key
        '[' simple_value ']' white_space {
           def value
             simple_value.value
           end
        }
      end

      rule single_attr_object_block
        type_identifier? untyped_single_attr_object_block {
          def value
            untyped_single_attr_object_block.value
          end
        }
      end

      rule untyped_single_attr_object_block
        single_attr_object_complex_head attr_vals SYM_END_DBLOCK {
           def value
             elements[1].value
	   end
        }
      / single_attr_object_complex_head SYM_END_DBLOCK {
          def value
            nil
          end
        }
      end

      rule single_attr_object_complex_head
        SYM_START_DBLOCK
      end

      rule primitive_object_block
        type_identifier? untyped_primitive_object_block {
	  def value
	    untyped_primitive_object_block.value
          end
        }
      end

      rule untyped_primitive_object_block
        SYM_START_DBLOCK primitive_object_value SYM_END_DBLOCK {
	  def value
	    primitive_object_value.value
          end
	}
      end

      rule primitive_object_value
        term_code_list_value '' {
          def value
            term_code_list_value.value
          end
        }
      / term_code '' {
          def value
            term_code.value
          end
        }
      / simple_list_value '' {
          def value
            simple_list_value.value
          end
        }
      / simple_interval_value '' {
          def value
            simple_interval_value.value
          end
        }
      / simple_value '' {
          def value
            simple_value.value
          end
        }
      end

      rule simple_value
        integer_value '' {
          def value
            integer_value.value
          end
        }
      / real_value '' {
          def value
            real_value.value
          end
        }
      / boolean_value '' {
          def value
            boolean_value.value
          end
        }
      / uri_value '' {
          def value
            uri_value.value
          end
        }
      / date_value '' {
          def value
            date_value.value
          end
        }
      / time_value '' {
          def value
            time_value.value
          end
        }
      / date_time_value '' {
          def value
            date_time_value.value
          end
        }
      / duration_value '' {
          def value
            duration_value.value
          end
        }
      / string_value '' {
          def value
            string_value.value
          end
        }
      / character_value '' {
          def value
            character_value.value
          end
        }
      end

      rule simple_list_value
        integer_list_value '' {
          def value
            integer_list_value.value
          end
        }
      / real_list_value '' {
          def value
            real_list_value.value
          end
        }
      / boolean_list_value '' {
          def value
            boolean_list_value.value
          end
        }
      / character_list_value '' {
          def value
            character_list_value.value
          end
        }
      / date_list_value '' {
          def value
            date_list_value.value
          end
        }
      / time_list_value '' {
          def value
            time_list_value.value
          end
        }
      / date_time_list_value '' {
          def value
            date_time_list_value.value
          end
        }
      / duration_list_value '' {
          def value
            duration_list_value.value
          end
        }
      / string_list_value '' {
          def value
            string_list_value.value
          end
        }
      end

      rule simple_interval_value
        integer_interval_value '' {
          def value
            integer_interval_value.value
          end
        }
      / real_interval_value '' {
          def value
            real_interval_value.value
          end
        }
      / date_interval_value '' {
          def value
            date_interval_value.value
          end
        }
      / time_interval_value '' {
          def value
            time_interval_value.value
          end
        }
      / date_time_interval_value '' {
          def value
            date_time_interval_value.value
          end
        }
      / duration_interval_value '' {
          def value
            duration_interval_value.value
          end
        }
      end

      rule term_code
        vtref:V_QUALIFIED_TERM_CODE_REF '' {
          def value
            vtref.value
          end
        }
      end

      rule term_code_list_value
        first:term_code more:(',' term_code)+ {
          def value
            term_codes.map {|t| t.value}
          end

          def term_codes
            [first] + more.elements.map {|e| e.term_code}
          end
        }
      / term_code ',' SYM_LIST_CONTINUE {
          def value
            [term_code.value]
          end
        }
      end

      rule uri_value
        uri:V_URI '' {
          def value
            uri.value
          end
        }
      end # of dADL grammar

# beginning of shared token section

      rule any_identifier
        type_identifier '' {
          def value
            type_identifier.value
          end
        }
      / V_ATTRIBUTE_IDENTIFIER '' {
          def value
            V_ATTRIBUTE_IDENTIFIER.value
          end
        }
      end

      rule type_identifier
        '(' id:V_GENERIC_TYPE_IDENTIFIER ')' white_space {
          def value
            id.value
          end
        }
      / id:V_GENERIC_TYPE_IDENTIFIER white_space {
          def value
            id.value
          end
        }
      / '(' id:V_TYPE_IDENTIFIER ')' white_space {
          def value
            id.value
          end
        }
      / id:V_TYPE_IDENTIFIER white_space {
          def value
            id.value
          end
        }
      end

      rule boolean_value
        SYM_TRUE {
          def value
            true
          end
          }
      / SYM_FALSE {
          def value
            false
          end
        }
      end

      rule boolean_list_value
        boolean_value (',' white_space more_bool:(boolean_value ''))+ {
          def value
            booelans.map {|b| b.value} 
          end

          def booleans
            [boolean_value] + more_bool.elements.map { |b| b.boolean_value }
          end
        }
      / boolean_value white_space SYM_LIST_CONTINUE {
          def value
            [boolean_value.value]
          end
        }
      end

      rule integer_value
        [+-]? V_INTEGER '' {
          def value
            text_value.to_i
          end
        }
      end

      rule integer_list_value
        integer_value more_i:(',' white_space integer_value)+ {
          def value
            integers.map { |i| i.value }
          end

          def integers
            [integer_value] + more_i.elements.map { |i| i.integer_value }
          end
        }
      / integer_value ',' white_space SYM_LIST_CONTINUE {
          def value
            [integer_value.value]
          end
        }
      end

      rule integer_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:integer_value SYM_ELLIPSIS SYM_LT up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
            :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:integer_value SYM_ELLIPSIS up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:integer_value SYM_ELLIPSIS SYM_LT up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:integer_value SYM_ELLIPSIS up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE iv:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => iv.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:integer_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule real_value
        ('+' / '-')? V_REAL {
          def value
            text_value.to_f
          end
        }
      end

      rule real_list_value
        real_value  more_i:(',' white_space real_value)* {
          def value
            reals.map { |i| i.value }
          end

          def reals
            [real_value] + more_i.elements.map { |i| i.real_value }
          end
        }
      / real_value ',' white_space SYM_LIST_CONTINUE {
          def value
            [real_value.value]
          end
        }
      end

      rule real_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:real_value SYM_ELLIPSIS SYM_LT up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:real_value SYM_ELLIPSIS up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:real_value SYM_ELLIPSIS SYM_LT up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:real_value SYM_ELLIPSIS up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE lo:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:real_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule character_value
        V_CHAR '' {
           def value
             text_value
           end
        }
      end

      rule character_list_value
        character_value (',' white_space more_chars:(character_value))+ {
          def value
            characters.map {|c| c.value }
          end

          def characters
            [character_value] + more_chars.elements.map {|c| c.character_value}
          end
        }
      / character_value ',' SYM_LIST_CONTINUE {
          def value
            [character_value.value]
          end
        }
      end

      rule string_value
        str:V_STRING '' {
          def value
            str.value
          end
        }
      end

      rule string_list_value
        first:string_value second:(',' white_space string_value)+ {
          def value
            strings.map {|s| s.value}
          end

          def strings
            [first] + second.elements.map {|s| s.string_value}
          end
        }
      / str:V_STRING ',' white_space SYM_LIST_CONTINUE {
          def value
            [str.value]
          end
        }
      end

      rule date_value
        ed:V_ISO8601_EXTENDED_DATE '' {
          def value
            ::OpenEHR::RM::DataTypes::Quantity::DateTime::DvDate.new(
              :value => ed.text_value)
          end
        }
      end

      rule date_list_value
        date_value more_dates:(',' white_space date_value)+ {
          def value
            dates.map {|d| d.value}
          end

          def dates
            [date_value] + more_dates.elements.map {|d| d.date_value}
          end
        }
      / date_value ',' white_space SYM_LIST_CONTINUE {
          def value
            [date_value.value]
          end
        }
      end

      rule date_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:date_value SYM_ELLIPSIS SYM_LT up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:date_value SYM_ELLIPSIS up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:date_value SYM_ELLIPSIS SYM_LT up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:date_value SYM_ELLIPSIS up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE val:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:date_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule time_value
        ti:V_ISO8601_EXTENDED_TIME '' {
          def value
            ::OpenEHR::RM::DataTypes::Quantity::DateTime::DvTime.new(
              :value => ti.text_value)
          end
        }
      end

      rule time_list_value
        time_value more_t:(',' white_space time_value)+ {
          def value
            times.map {|t| t.value}
          end

          def times
            [time_value] + more_t.elements.map {|t| t.time_value}
          end
        }
      / time_value ',' white_space SYM_LIST_CONTINUE {
          def value
            [time_value.value]
          end
        }
      end

      rule time_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:time_value SYM_ELLIPSIS SYM_LT up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:time_value SYM_ELLIPSIS up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:time_value SYM_ELLIPSIS SYM_LT up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:time_value SYM_ELLIPSIS up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE tv:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => tv.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule date_time_value
        dt:V_ISO8601_EXTENDED_DATE_TIME '' {
          def value
            ::OpenEHR::RM::DataTypes::Quantity::DateTime::DvDateTime.new(
              :value => dt.text_value)
          end
        }
      end

      rule date_time_list_value
        date_time_value (',' more_dt:date_time_value)+ {
          def value
            date_times.map {|t| t.value}
          end

          def date_times
            [date_time_value] + more_dt.elements.map {|dt| dt.date_time_value}
          end
        }
      / date_time_value ',' SYM_LIST_CONTINUE {
          def value
            [date_time_value.value]
          end
        }
      end

      rule date_time_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:date_time_value SYM_ELLIPSIS SYM_LT up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:date_time_value SYM_ELLIPSIS up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:date_time_value SYM_ELLIPSIS SYM_LT up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:date_time_value SYM_ELLIPSIS up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE dt:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => dt.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:date_time_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule duration_value
        du:V_ISO8601_DURATION '' {
          def value
            ::OpenEHR::RM::DataTypes::Quantity::DateTime::DvDuration.new(
              :value => du.text_value)
          end
        }
      end

      rule duration_list_value
        duration_value more_d:(',' duration_value)+ {
          def value
            durations.map {|d| d.value}
          end

          def durations
            [duration_value] + more_d.elements.map {|d| d.duration_value}
          end
        }
      / duration_value ',' SYM_LIST_CONTINUE {
          def value
            [duration_value.value]
          end
        }
      end

      rule duration_interval_value
        SYM_INTERVAL_DELIM SYM_GT lo:duration_value SYM_ELLIPSIS SYM_LT up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:duration_value SYM_ELLIPSIS up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => false,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM lo:duration_value SYM_ELLIPSIS SYM_LT up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM lo:duration_value SYM_ELLIPSIS up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(:lower => lo.value,
                  :upper => up.value,
                  :lower_included => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LT up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_LE up:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => up.value,
                  :lower_unbounded => true,
                  :upper_included => true)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GT lo:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => lo.value,
                  :uppper_unbounded => true,
                  :lower_included => false)
          end
        }
      / SYM_INTERVAL_DELIM SYM_GE val:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :lower => val.value,
                  :upper_unbounded => true,
                  :lower_included => true)
          end
        }
      / SYM_INTERVAL_DELIM val:duration_value SYM_INTERVAL_DELIM {
          def value
            OpenEHR::AssumedLibraryTypes::Interval.new(
                  :upper => val.value,
                  :lower => val.value,
                  :upper_included => true,
                  :lower_included => true)
          end
        }
      end

      rule ALPHANUM
        [a-zA-Z0-9]
      end

      rule IDCHAR
        [a-zA-Z0-9_]
      end

      rule NAMECHAR
        [a-zA-Z0-9\._\-]
      end

      rule NAMECHAR_SPACE
        [a-zA-Z0-9\._\- ]
      end

      rule NAMECHAR_PAREN
        [a-zA-Z0-9\._\-\(\)]
      end

      rule NAMESTR
        [a-zA-Z] [a-zA-Z0-9_]+
      end

      rule space
        COMMENT* white_space
      end

      rule COMMENT
        white_space '--' [^\n]* "\n"
      end

      rule white_space
        [ \t\r\n]*
      end

      rule Minus_code
        '-'
      end

      rule Plus_Code
        '+'
      end

      rule Star_code
        '*'
      end

      rule Slash_code
        '/'
      end

      rule Carret_code
        '^'
      end

      rule Dot_code
        '.'
      end

      rule Semicolon_code
        ';'
      end

      rule Colon_code
        ':'
      end

      rule Comma_code
        ','
      end

      rule Expclamation_code
        '!'
      end

      rule Left_parenthesis_code
        '('
      end

      rule Right_parenthesis_code
        ')'
      end

      rule Dollar_code
        '$'
      end

      rule SYM_DT_UNKNOWN
        '??'
      end

      rule Question_mark_code
        '?'
      end

      rule SYM_INTERVAL_DELIM
        '|'
      end

      rule Left_bracket_code
        '[' space
      end

      rule Right_bracket_codde
        ']'
      end

      rule SYM_EQ
        '=' white_space
      end

      rule SYM_GE
        ('=>' / '>=') white_space
      end

      rule SYM_LE
        ('<=' / '=>') white_space
      end

      rule SYM_LT
        '<' white_space
      end

      rule SYM_GT
        '>' white_space
      end

      rule SYM_START_DBLOCK
        '<' space
      end

      rule SYM_END_DBLOCK
        '>' space
      end

      rule SYM_START_CBLOCK
        '{' space
      end

      rule SYM_END_CBLOCK
        '}'
      end

      rule SYM_ELLIPSIS
        '..'
      end

      rule SYM_LIST_CONTINUE
        '...'
      end

      rule SYM_INFINITY
        [Ii] [Nn] [Ff] [Ii] [Nn] [Ii] [Tt] [Yy] space
      end

      rule SYM_ARCHETYPE
        [Aa] [Rr] [Cc] [Hh] [Ee] [Tt] [Yy] [Pp] [Ee] space
      end

      rule SYM_MATCHES
        ([Mm] [Aa] [Tt] [Cc] [Hh] [Ee] [Ss] / [Ii] [Ss] '_' [Ii] [Nn]) white_space
      end

      rule SYM_THEN
        [Tt] [Hh] [Ee] [Nn] space
      end

      rule SYM_ELSE
        [Ee] [Ll] [Ss] [Ee] space
      end

      rule SYM_AND
        [Aa] [Nn] [Dd] space
      end

      rule SYM_OR
        [Oo] [Rr] space
      end

      rule SYM_XOR
        [Xx] [Oo] [Rr] space
      end

      rule SYM_NOT
        [Nn] [Oo] [Tt] space
      end

      rule SYM_IMPLIES
        [Ii] [Mm] [Pp] [Ll] [Ii] [Ee] [Ss] space
      end

      rule SYM_TRUE
        [Tt] [Rr] [Uu] [Ee] space
      end

      rule SYM_FALSE
        [Ff] [Aa] [Ll] [Ss] [Ee] space
      end

      rule SYM_FORALL
        [Ff] [Oo] [Rr] '_' [Aa] [Ll] [Ll] space
      end

      rule SYM_EXISTS
        [Ee] [Xx] [Ii] [Ss] [Tt] [Ss] space
      end

      rule SYM_EXISTENCE
        [Ee] [Xx] [Ii] [Ss] [Tt] [Ee] [Nn] [Cc] [Ee] space
      end

      rule SYM_OCCURRENCES
        [Oo] [Cc] [Cc] [Uu] [Rr] [Rr] [Ee] [Nn] [Cc] [Ee] [Ss] white_space
      end

      rule SYM_CARDINALITY
        [Cc] [Aa] [Rr] [Dd] [Ii] [Nn] [Aa] [Ll] [Ii] [Tt] [Yy] white_space
      end

      rule SYM_ORDERED
        [Oo] [Rr] [Dd] [Ee] [Rr] [Ee] [Dd] white_space
      end

      rule SYM_UNORDERD
        [Uu] [Nn] [Oo] [Rr] [Dd] [Ee] [Rr] [Ee] [Dd] white_space
      end

      rule SYM_UNIQUE
        [Uu] [Nn] [Ii] [Qq] [Uu] [Ee] space
      end

      rule SYM_INFINITY
        [Ii] [Nn] [Ff] [Ii] [Nn] [Ii] [Tt] [Yy] space
      end

      rule SYM_USE_NODE
        [Uu] [Ss] [Ee] '_' [Nn] [Oo] [Dd] [Ee] space
      end

      rule SYM_ALLOW_ARCHETYPE
        ([Aa] [Ll] [Ll] [Oo] [Ww] /  [Uu] [Ss] [Ee]) '_' [Aa] [Rr] [Cc] [Hh] [Ee] [Tt] [Yy] [Pp] [Ee] space
      end

      rule SYM_INCLUDE
        [Ii] [Nn] [Cc] [Ll] [Uu] [Dd] [Ee] space
      end

      rule SYM_EXCLUDE
        [Ee] [Xx] [Cc] [Ll] [Uu] [Dd] [Ee] space
      end

      rule SYM_TEMPLATE_COMPONENT
        [Tt] [Ee] [Mm] [Pp] [Ll] [Aa] [Tt] [Ee] ' _' [Cc] [Oo] [Mm] [Pp] [Oo] [Nn] [Ee] [Nn] [Tt] space
      end

      rule SYM_TEMPLATE
        [Tt] [Ee] [Mm] [Pp] [Ll] [Aa] [Tt] [Ee] space
      end

      rule SYM_OPERATIONAL_TEMPLATE
        [Oo] [Pp] [Ee] [Rr] [Aa] [Tt] [Ii] [Oo] [Nn] [Aa] [Ll] '_' [Tt] [Ee] [Mm] [Pp] [Ll] [Aa] [Tt] [Ee] space
      end

      rule SYM_ADL_VERSION
        [Aa] [Dd] [Ll] '_' [Vv] [Ee] [Rr] [Ss] [Ii] [Oo] [Nn] space
      end

      rule SYM_IS_CONTROLLED
        [Cc] [Oo] [Nn] [Tt] [Rr] [Oo] [Ll] [Ll] [Ee] [Dd] space
      end

      rule SYM_IS_GENERATED
        [Gg] [Ee] [Nn] [Ee] [Rr] [Aa] [Tt] [Ee] [Dd] space
      end

      rule SYM_SPECIALIZE
        [Ss] [Pp] [Ee] [Cc] [Ii] [Aa] [Ll] [Ii] [SsZz] [Ee] space
      end    

      rule SYM_CONCEPT
        [Cc] [Oo] [Nn] [Cc] [Ee] [Pp] [Tt] space
      end

      rule SYM_LANGUAGE
        [Ll] [Aa] [Nn] [Gg] [Uu] [Aa] [Gg] [Ee] space
      end

      rule SYM_DESCRIPTION
        [Dd] [Ee] [Ss] [Cc] [Rr] [Ii] [Pp] [Tt] [Ii] [Oo] [Nn] space
      end

      rule SYM_DEFINITION
        [Dd] [Ee] [Ff] [Ii] [Nn] [Ii] [Tt] [Ii] [Oo] [Nn] space
      end

      rule SYM_INVARIANT
        [Ii] [Nn] [Vv] [Aa] [Rr] [Ii] [Aa] [Nn] [Tt] space
      end

      rule SYM_ONTOLOGY
        [Oo] [Nn] [Tt] [Oo] [Ll] [Oo] [Gg] [Yy] space
      end

      rule SYM_ANNOTATIONS
        [Aa] [Nn] [Nn] [Oo] [Tt] [Aa] [Tt] [Ii] [Oo] [Nn] [Ss] space
      end

      rule V_VERSION_STRING
        [0-9]+ '.' [0-9]+ ('.' [0-9]+)* {
          def value
            text_value
          end
        }
      end

      rule V_ARCHETYPE_ID
        NAMESTR ('-' NAMESTR) 2..2 '.' NAMESTR ('-' NAMESTR)* '.v' [1-9] [0-9]* {
          def value
            text_value
          end
        }
      end

      rule V_IDENTIFIER
        [a-zA-Z] [a-zA-Z0-9_]* {
          def value
            text_value
          end
        }
      end

      rule V_URI
        [a-z]+ '://' [^<>|\\{}^~"\[\] ]* { 
          def value
            text_value
          end
        }
      end

      rule V_QUALIFIED_TERM_CODE_REF
        '[' ti:(NAMECHAR_PAREN+) '::' cs:(NAMECHAR+) ']' {
          def value
            term_id = OpenEHR::RM::Support::Identification::TerminologyID.new(
              :value => ti.text_value)
            OpenEHR::RM::DataTypes::Text::CodePhrase.new(
              :terminology_id => term_id, :code_string => cs.text_value)
          end
        }
      end

      rule ERR_V_QUALIFIED_TERM_CODE_REF
        '[' er:(NAMECHAR_PAREN+ '::' NAMECHAR_SPACE+) ']' {
          def value
            er.text_value
          end
        }
      end

      rule V_LOCAL_TERM_CODE_REF
        '[' lt:(ALPHANUM NAMECHAR*) ']' {
          def value
            lt.text_value
          end
        }
      end

      rule V_LOCAL_CODE
        'a' [ct] [0-9\.]+ {
          def value
            text_value
          end
        }
      end

      rule V_TERM_CODE
        '[' code:([a-zA-Z0-9()._\-]+) '::' white_space {
          def value
            ::OpenEHR::RM::Support::Identification::TerminologyID.new(
              :value => code.text_value)
          end
        }
      end

      rule V_ISO8601_EXTENDED_DATE_TIME
        ([0-9] 4..4 '-' [0-1] [0-9] '-' [0-3] [0-9] 'T' [0-2] [0-9] ':' [0-6] [0-9] ':' [0-6] [0-9] (',' [0-9]+)? ('Z' / [+-] [0-9] 4..4)? ) / ([0-9] 4..4 '-' [0-1] [0-9] '-' [0-3] [0-9] 'T' [0-2] [0-9] ':' [0-6] [0-9] ('Z' / [+-] [0-9] 4..4)?) / ([0-9] 4..4 '-' [0-1] [0-9] '-' [0-3] [0-9] 'T' [0-2] [0-9] ('Z' / [+-] [0-9] 4..4)?)
      end

      rule V_ISO8601_EXTENDED_TIME
        [0-2] [0-9] ':' [0-6] [0-9] ':' [0-6] [0-9] (',' [0-9]+)? ('Z' / [+-] [0-9] 4..4)? / [0-2] [0-9] ':' [0-6] [0-9] ('Z' / [+-] [0-9] 4..4)?
      end

      rule V_ISO8601_EXTENDED_DATE
        [0-9] 4..4 '-' [0-1] [0-9] '-' [0-3] [0-9] / [0-9] 4..4 '-' [0-1] [0-9]
      end

      rule V_ISO8601_DURATION
        'P' ([0-9]+ [yY])? ([0-9]+ [mM])? ([0-9]+ [wW])? ([0-9]+ [dD])? 'T' ([0-9]+ [hH]) ([0-9]+ [mM])? ([0-9]+ ('.' [0-9]+)? [sS])?
      / 'P' ([0-9]+ [yY])? ([0-9]+ [mM])? ([0-9]+ [wW])? ([0-9]+ [dD])? 'T' ([0-9]+ [hH])? ([0-9]+ [mM]) ([0-9]+ ('.' [0-9]+)? [sS])?
      / 'P' ([0-9]+ [yY])? ([0-9]+ [mM])? ([0-9]+ [wW])? ([0-9]+ [dD])? 'T' ([0-9]+ [hH])? ([0-9]+ [mM])? ([0-9]+ ('.' [0-9]+)? [sS])?
      / 'P' ([0-9]+ [yY]) ([0-9]+ [mM])? ([0-9]+ [wW])? ([0-9]+ [dD])?
      / 'P' ([0-9]+ [yY])? ([0-9]+ [mM]) ([0-9]+ [wW])? ([0-9]+ [dD])? 
      / 'P' ([0-9]+ [yY])? ([0-9]+ [mM])? ([0-9]+ [wW]) ([0-9]+ [dD])?
      / 'P' ([0-9]+ [yY])? ([0-9]+ [mM])? ([0-9]+ [wW])? ([0-9]+ [dD])
      end

      rule V_ISO8601_DATE_CONSTRAINT_PATTERN
        [yY] [yY] [yY] [yY] '-' [mM?X] [mM?X] '-' [dD?X] [dD?X]    
      end

      rule V_ISO8601_TIME_CONSTRAINT_PATTERN
        [hH] [hH] ':' [mM?X] [mM?X] ':' [sS?X] [sS?X]
      end

      rule V_ISO8601_DATE_TIME_CONSTRAINT_PATTERN
        [yY] [yY] [yY] [yY] '-' [mM?X] [mM?X] '-' [dD?X] [dD?X] [Tt ] [hH?X] [hH?X] ':' [mM?X] [mM?X] ':' [sS?X] [sS?X]
      end

      rule V_ISO8601_DURATION_CONSTRAINT_PATTERN
        'P' [yY]? [mM]? [wW]? [dD]? 'T' [hH] [mM]? [sS]?
      / 'P' [yY]? [mM]? [wW]? [dD]? 'T' [hH]? [mM] [sS]?
      / 'P' [yY]? [mM]? [wW]? [dD]? 'T' [hH]? [mM]? [sS]
      / 'P' [yY] [mM]? [wW]? [dD]?
      / 'P' [yY]? [mM] [wW]? [dD]?
      / 'P' [yY]? [mM]? [wW] [dD]?
      / 'P' [yY]? [mM]? [wW]? [dD]
      end

      rule V_TYPE_IDENTIFIER
        [A-Z] IDCHAR* {
          def value
            text_value
          end
        }
      end

      rule V_GENERIC_TYPE_IDENTIFIER
        [A-Z] IDCHAR* '<' [a-zA-Z0-9,_]+ '>' {  # <>
          def value
            text_value
          end
        }
      end

      rule V_ATTRIBUTE_IDENTIFIER
        [a-z] IDCHAR* {
          def value
            text_value
          end
        }
      end

      rule V_INTEGER
        [0-9]+ [eE] [+-]? [0-9] {
          def value
            text_value.to_i
          end
        }	
      / [1-9] [0-9]+ {
          def value
            text_value.to_i
          end
        }	
      / [0-9] {
          def value
            text_value.to_i
          end
        }	
      end

      rule V_REAL
        [0-9]+ '.' [0-9]+ [eE] [+-]? [0-9]+ / [1-9] [0-9]+ '.' [0-9]+ / [0-9] '.' [0-9]+ {
          def value
            text_value.to_f
          end
        }
      end

      rule V_CHAR
        [^\\\n\"] {
          def value
            text_value
          end
        }
      end

      rule V_STRING
        '"' str:(('\"' / !'"' .)*) '"' {
          def value
            str.text_value.tr_s('\\\\', '\\')
          end
        }
      end # of Shared Token section
    end # of ADLGrammar
  end # of Parser
end # of openEHR