require_relative '../../version2_0'
require_relative '../../relationship'

module BELParser
  module Language
    module Version2_0
      module Relationships
        # Decreases:  +A -| B+ -  For terms A and B, +A decreases B or
        # A -| B+ indicates that increases in A have been observed to
        # cause decreases in B. +A decreases B+ also represents cases
        # where decreases in A have been observed to cause increases in B,
        # for example, in recording the results of gene deletion or other
        # inhibition experiments. A is a BEL Term and B is either a BEL
        # Term or a BEL Statement. The relationship does not indicate
        # that the changes in A are either necessary for changes in B,
        # nor does it indicate that changes in A are sufficient to cause
        # changes in B.
        class Decreases
          extend Relationship

          SHORT       = :'-|'
          LONG        = :decreases

          DESCRIPTION = <<-DOC
Decreases:  +A -| B+ -  For terms A and B, +A decreases B or
A -| B+ indicates that increases in A have been observed to
cause decreases in B. +A decreases B+ also represents cases
where decreases in A have been observed to cause increases in B,
for example, in recording the results of gene deletion or other
inhibition experiments. A is a BEL Term and B is either a BEL
Term or a BEL Statement. The relationship does not indicate
that the changes in A are either necessary for changes in B,
nor does it indicate that changes in A are sufficient to cause
changes in B.
          DOC

          def self.short
            SHORT
          end

          def self.long
            LONG
          end

          def self.description
            DESCRIPTION
          end

          def self.causal?
            true
          end

          def self.decreasing?
            true
          end

          def self.directed?
            true
          end
        end
      end
    end
  end
end