The ISO-specific element <doc-ident> container element holds information which uniquely identifies this standards document for ISO purposes. Non-ISO organizations are advised to use elements directly within <std-meta> and inside <std-ident> instead.
The following, in order:
<sdo> ISO-Specific Name For a Standards Development Organization, zero or one
<proj-id> ISO-Specific Project Identifier, zero or one
<language> ISO-specific Language Designation, zero or one
<release-version> Release-Version, zero or one
<urn> ISO-Specific Uniform Resource Name, zero or one