Indicates the unique identifier for an associated element, so that the element’s content may be cross-referenced. IDs must be unique inside their document (not just within their element type), and the XML parser enforces this.
| Value |
Meaning |
| An identifier (ID) |
A unique identifier for the element. |
| Restriction: This attribute must be specified if the element is used.
|
<abbrev>,
<abstract>,
<ack>,
<address>,
<aff>,
<alt-text>,
<app>,
<app-group>,
<array>,
<article-title>,
<attrib>,
<author-notes>,
<award-group>,
<award-id>,
<bio>,
<boxed-text>,
<caption>,
<chem-struct>,
<chem-struct-wrap>,
<col>,
<colgroup>,
<collab>,
<contrib>,
<contrib-group>,
<corresp>,
<def>,
<def-item>,
<def-list>,
<disp-formula>,
<ext-link>,
<fig-group>,
<fn>,
<fn-group>,
<funding-source>,
<funding-statement>,
<inline-formula>,
<inline-graphic>,
<inline-supplementary-material>,
<institution>,
<kwd>,
<kwd-group>,
<list>,
<list-item>,
<long-desc>,
<media>,
<milestone-end>,
<milestone-start>,
<mixed-citation>,
<mml:math>,
<named-content>,
<notes>,
<p>,
<person-group>,
<product>,
<ref>,
<ref-list>,
<related-article>,
<sec>,
<sig>,
<sig-block>,
<source>,
<speech>,
<statement>,
<sub-article>,
<supplementary-material>,
<table>,
<table-wrap>,
<table-wrap-group>,
<tbody>,
<td>,
<tfoot>,
<th>,
<thead>,
<title>,
<tr>,
<trans-abstract>,
<trans-source>,
<trans-title>,
<xref>
| Value |
Meaning |
| An XML identifier (ID) |
A unique identifier for the element. |
| Restriction: This attribute may be specified if the element is used.
|