README.md in unidom-standard-1.2 vs README.md in unidom-standard-1.3

@@ -44,11 +44,13 @@
 ### As Source Standard concern
 The As Source Standard concern do the following tasks for the includer automatically:  
 1. Define the has_many :target_associatings macro as: ``has_many :target_associatings, class_name: 'Unidom::Standard::StandardAssociating', foreign_key: :source_id``
 2. Define the has_many :target_standards macro as: ``has_many :target_standards, through: :target_associatings, source: :target``
 3. Define the #associate! method as: ``associate!(target, due_to: 'REVS', at: Time.now)``
+4. Define the #associate? method as: ``associate?(target, due_to: 'REVS', at: Time.now)``
 
 ### As Target Standard concern
 The As Target Standard concern do the following tasks for the includer automatically:  
 1. Define the has_many :source_associatings macro as: ``has_many :source_associatings, class_name: 'Unidom::Standard::StandardAssociating', foreign_key: :target_id``
 2. Define the has_many :source_standards macro as: ``has_many :source_standards, through: :source_associatings, source: :source``
 3. Define the #is_associated! method as: ``is_associated!(source, due_to: 'REVS', at: Time.now)``
+4. Define the #is_associated? method as: ``is_associated?(source, due_to: 'REVS', at: Time.now)``