<urn>
ISO-Specific Uniform Resource Name
For ISO Processing, this element holds an ISO Uniform Resource Name (URN) for this document, as specified by RFC 5141.
Remarks
The <urn> element may be used only inside
<doc-ident> within the three ISO-related standards metadata elements: <iso-meta>,
<reg-meta>, or <nat-meta>. The element is
retained for backwards-compatibility purposes.
Best Practice: For NISO STS documents going forward, the element <self-uri> should be used as an alternative to <urn>.
Model Description
Text, numbers, or special characters, zero or more
This element may be contained in:
Example
...
<doc-ident>
<sdo>ISO</sdo>
<proj-id>57385</proj-id>
<language>en</language>
<release-version>IS</release-version>
<urn>iso:std:iso-iec:guide:71:ed-2:v1:en</urn>
</doc-ident>
...