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xlink:type Type of Link

The kind of link used with an element. For all elements in this Tag Suite that can take links, this attribute may be either omitted or set to the word “simple”, which means that the link is a simple, one-ended link.

Usage/Remarks

IN JATS, for all elements (except <mml:math>), the only valid value for the attribute is the word “simple”, but the attribute is optional and may be omitted. For the <mml:math> element, best practice is to restrict the attribute value to one defined in the MathML and XLink specifications; see them for further details.
OPTIONAL on many elements; click for list and usage

<abbrev>, <article-version>, <award-desc>, <award-group>, <award-id>, <award-name>, <bio>, <chem-struct>, <collab>, <collab-name>, <collab-wrap>, <conference>, <contrib>, <custom-meta>, <element-citation>, <email>, <ext-link>, <extended-by>, <funding-source>, <graphic>, <inline-graphic>, <inline-media>, <inline-supplementary-material>, <institution>, <issue-id>, <license>, <long-desc>, <media>, <mixed-citation>, <named-content>, <nlm-citation>, <product>, <pub-id>, <related-article>, <related-object>, <resource-name>, <restricted-by>, <self-uri>, <supplementary-material>, <support-source>, <uri>, <volume-id>

Value Meaning
simple The link is an XML simple (one-ended) link.
Restriction @xlink:type is an optional attribute, but if used, is restricted to the word “simple”.
Tagged Sample

<ext-link> is simple (one-ended) link 

...
<ext-link ext-link-type="url" xlink:type="simple"  
  xlink:role="http://www.mulberrytech.com/walkthewalk.html" 
  xlink:title="XML-based slideshow application"
  xlink:actuate="onRequest" xlink:show="new" 
  xlink:href="http://www.mulberrytech.com/slideshow/index.html">
 Mulberry Slideshow XML</ext-link>
...