@context;literal@ @props.constraint_name;literal@ All elements in side @props.rel_side@ of the segment @props.segment_name@ must be in the segment @props.req_segment_name@

In other words, before creating a @rel.rel_type_pretty_name@ to the group @props.group_name@, the @rel.role_pretty_name@ must be a @req_rel.role_pretty_name@ of the group @props.req_group_name@.

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