+ <xs:attribute name="locus" type="xs:boolean" default="false">
+ <xs:annotation>
+ <xs:documentation>
+ true for gene locus mapping, source=species, version=assembly, accession=chromosome
+ </xs:documentation>
+ </xs:annotation>
+ </xs:attribute>
+ <xs:attribute name="canonical" type="xs:boolean" default="false">
+ <xs:annotation>
+ <xs:documentation>
+ true for the representative accession for databases where multiple accessions map to the same entry (eg. Uniprot)
+ </xs:documentation>
+ </xs:annotation>
+ </xs:attribute>