Hypertext schematic of the XML schema, WMO19115_v0_1.html
Schematic of the XML Schema as an image (v0-1)
XML Schema Version 0.1, May 2002, WMO19115_metadata_v0_1.xsd
XML Code List Version 0.1, May 2002, WMO19115_CodeLists_v0_1.xsd