Object Identifier

Unique identifier (such as a DOI or URI) for a component within an article (for example, for a figure or a table).


Such an identifier may be created by a publisher or archive, and there is no requirement that identifiers be unique.
Design Note: An element, rather than an attribute, was chosen as the means to capture DOIs and other identifiers so multiple identifiers could be retained.
Publication Identifier versus Object Identifier: This Tag Set includes two elements which may be used to record a DOI as an identifier: <object-id> and <pub-id>. The <object-id> is used to identify parts of an article, for example, a particular section, a figure, a table, or even a specific citation (as an entity) in the article’s bibliographic reference list. The <pub-id> element is used inside a citation to identify a cited publication. Consequently, a bibliographic reference (<element-citation> or <mixed-citation>) could contain both the <object-id> element (with the DOI for that citation) and the <pub-id> element (with the DOI for the journal being referenced in the citation) as shown in an example below.
External Identifier: This element holds an external identifier, typically assigned to an object such as a table by a publisher. The contents of this element should not be confused with the @id attribute, which holds an internal document identifier that can be used by software to preform a simple link.


Content Model

<!ELEMENT  object-id    (#PCDATA)                                    >


Text, numbers, or special characters

This element may be contained in:

Example 1

For a media object:
<media id="v1" mime-subtype="avi" mimetype="video" orientation="portrait" 
position="anchor" specific-use="original-format" xlink:href="v1">
<object-id pub-id-type="doi" specific-use="metadata">10.1063/1.4807071.1</object-id>

Example 2

Media object example in context:
<fig id="f1" orientation="portrait" position="float">
<label>FIG. 1.</label>
<p>(a) Schematic of the working principles of HFM, (b) a typical application
scheme for an electric bias in HFM, (c) regulation the conformations and
dynamics (trapping, concentration, and sudden stretching) of λ-DNA molecules
in HFM, and (d) schematic of the trapping location regulation (enhanced online).
[URL: <ext-link ext-link-type="uri" xlink:href="https://dx.doi.org/10.1063/1.4762852.1">
<media id="v1" mime-subtype="avi" mimetype="video" orientation="portrait"
position="anchor" specific-use="original-format" xlink:href="v1">
<object-id pub-id-type="doi" specific-use="metadata">10.1063/1.4762852.1</object-id>
<media mime-subtype="mpeg" mimetype="video" orientation="portrait"
position="anchor" specific-use="archival-format" xlink:href="v1"></media>
<media mime-subtype="x-flv" mimetype="video" orientation="portrait"
position="anchor" specific-use="online-format" xlink:href="v1"></media>
<graphic orientation="portrait" position="float" xlink:href="f1"/>
<graphic id="f1a" orientation="portrait" position="float" xlink:href="dummy1.png"/>
<graphic id="f1b" orientation="portrait" position="float" xlink:href="dummy2.png"/>
<graphic id="f1c" orientation="portrait" position="float" xlink:href="dummy3.png"/>
<graphic id="f1d" orientation="portrait" position="float" xlink:href="dummy4.png"/>

Example 3

A bibliographic reference (<element-citation>) containing an <object-id> element (with the DOI for the citation) and a <pub-id> element (with the DOI for the journal being referenced in the citation):
<article dtd-version="1.1">
<article-id pub-id-type="doi">MyPub.20070215.03154</article-id>...
<ref id="B6">
<object-id pub-id-type="doi">
<ref id="B7">
<object-id pub-id-type="doi">
<person-group person-group-type="author"> 
<article-title>Infant Botulism</article-title> 
<source>J Perinatol.</source>
<year iso-8601-date="2007">2007</year> 
<pub-id pub-id-type="pmid">17314986</pub-id> 
<pub-id pub-id-type="doi">10.1038/sj.jp.7211651</pub-id> 
<ref id="B8">
<object-id pub-id-type="doi">
<ref id="B9">
<object-id pub-id-type="doi">