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SUBTYPE_CONSTRAINT inter_stratum_feature_template_subtypes FOR Inter_stratum_feature_template; ONEOF (Component_termination_passage_template, Via_template, Unsupported_passage_template, Inter_stratum_feature_edge_segment_template, Inter_stratum_feature_edge_template); END_SUBTYPE_CONSTRAINT; -- inter_stratum_feature_template_subtypes |