@prefix rdf:	<http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ns1:	<http://purl.obolibrary.org/obo/> .
@prefix owl:	<http://www.w3.org/2002/07/owl#> .
ns1:RO_0002504	rdf:type	owl:AnnotationProperty .
@prefix rdfs:	<http://www.w3.org/2000/01/rdf-schema#> .
ns1:RO_0002504	rdfs:subPropertyOf	ns1:RO_0002175 ;
	rdfs:label	"always present in taxon" ;
	ns1:IAO_0000112	"forelimb always_present_in_taxon Euarchontoglires" ,
		"brain always_present_in_taxon 'Vertebrata'" ;
	ns1:IAO_0000115	"S always_present_in_taxon T if every fully formed member of taxon T has part some S, or is an instance of S" ;
	ns1:IAO_0000116	"This is a very strong relation. Often we will not have enough evidence to know for sure that there are no species within a lineage that lack the structure - loss is common in evolution. However, there are some statements we can make with confidence - no vertebrate lineage could persist without a brain or a heart. All primates are limbed. " ;
	ns1:IAO_0000118	"never lost in" .