lib/ieee/idams/publication_info.rb in ieee-idams-0.2.7 vs lib/ieee/idams/publication_info.rb in ieee-idams-0.2.8

@@ -89,10 +89,10 @@
       # @return [PackageMemberSet] package member details
       attribute :package_member_set, PackageMemberSet
 
       # ISBN information
       # @return [Isbn] ISBN details
-      attribute :isbn, Isbn
+      attribute :isbn, Isbn, collection: true
 
       # ISBN information
       # @return [PubSponsor] sponsor details
       attribute :pubsponsor, PubSponsor