XML Schema Implementation:
http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/

Číselníky:
<gmd:CI_RoleCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/ML_gmxCodelists.xml#CI_RoleCode" codeListValue="">
	
			</gmd:CI_RoleCode>


Odkaz na ISO 19139 repository:
http://www.isotc211.org/2005/gmd/


Validátor XML:
http://www.validome.org/xml/validate