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xmlns:xlink XLink Namespace Declaration

Namespace declaration pseudo-attribute for XLink.

Usage/Remarks

This attribute value is fixed and will be added implicitly by many processors. For data portability, however, it is recommended that it be given explicitly, in order to enable a document to be processed standalone.
Strictly speaking this pseudo-attribute (namespace declaration) is not needed by documents that contain no links, but these will be rare.
FIXED (not settable) on element: <article>
Value Meaning
http://www.w3.org/1999/xlink The prefix “xlink” has been set to this URL, the URL of the W3C XLink Recommendation.
Restriction This attribute value may not be changed.
Tagged Sample

@xmlns:xlink namespace at the article level

<article xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink"
  version="5.0-subset Balisage-1.5" xml:id="HR-23632987-8973">
  <title>Raleigh&#8217;s Discoveries in the New World</title>
  <subtitle>New Insight into the Roanoke Colony</subtitle>
  <info>
    ...
  </info>
  <section xml:id="mul1">
    ...
  </section>
  ...
</article>