<object-id>
Object Identifier
Unique identifier (such as a DOI or URI) for a component within a book, a book component, or a structural portion of a book (for example, for a figure or a table).
Remarks
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 a book or book component, for example, a particular section, a figure, a table, or even a
specific citation (as an entity) in the bibliographic reference list of a book or book part. 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.
Attributes
Content Model
<!ELEMENT object-id (#PCDATA) >
Description
Text, numbers, or special characters
This element may be contained in:
<abstract>, <ack>, <answer>, <answer-set>, <app>, <bio>, <boxed-text>, <chem-struct>, <chem-struct-wrap>, <element-citation>, <explanation>, <fig>, <fig-group>, <graphic>, <media>, <mixed-citation>, <notes>, <option>, <product>, <question>, <question-preamble>, <question-wrap>, <question-wrap-group>, <ref-list>, <related-article>, <related-object>, <sec>, <statement>, <supplementary-material>, <table-wrap>, <table-wrap-group>, <trans-abstract>
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>
</media>
...Example 2
Media object example in context:
...
<fig id="f1" orientation="portrait" position="float">
<label>FIG. 1.</label>
<caption>
<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="http://dx.doi.org/10.1063/1.4762852.1">
http://dx.doi.org/10.1063/1.4762852.1</ext-link>]
<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>
</p>
</caption>
<graphic xlink:href="f1"/>
<graphic id="f1a" xlink:href="dummy1.png"/>
<graphic id="f1b" xlink:href="dummy2.png"/>
<graphic id="f1c" xlink:href="dummy3.png"/>
<graphic id="f1d" xlink:href="dummy4.png"/>
</fig>
...Example 3
A bibliographic 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):
... <book-back> <ref-list>... <ref id="B7"> <label>7</label> <element-citation> <object-id pub-id-type="doi"> MyPub.20070215.03154.s434</object-id> <person-group person-group-type="author"> <name><surname>Brook</surname> <given-names>I.</given-names></name> </person-group> <article-title>Infant Botulism</article-title> <source>J Perinatol.</source> <year iso-8601-date="2007">2007</year> <volume>27</volume> <issue>3</issue> <fpage>175</fpage> <lpage>180</lpage> <pub-id pub-id-type="pmid">17314986</pub-id> <pub-id pub-id-type="doi">10.1038/sj.jp.7211651</pub-id> </element-citation> </ref> <ref id="B8"> <label>8</label> <element-citation> <object-id pub-id-type="doi"> MyPub.20070215.03154.s435</object-id> ...</element-citation> </ref> ...</ref-list> </book-back> ...
Example 4
Inside a <graphic> as part of the alternatives to an equation:
...
<p>... This can be seen in the following:
<disp-formula>
<alternatives>
<textual-form>(a + 3)<sup>2</sup> - (10 - b) = 24</textual-form>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="fors2682.f3">
<object-id>463492</object-id>
</graphic>
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow>
<mml:msup>
<mml:mfenced>
<mml:mrow>
<mml:mi>a</mml:mi>
<mml:mo>+</mml:mo>
<mml:mn>3</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mn>2</mml:mn>
</mml:msup>
<mml:mo>−</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mi>10</mml:mi>
<mml:mo>−</mml:mo>
<mml:mn>b</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mo>=</mml:mo>
<mml:mn>24</mml:mn>
</mml:mrow>
</mml:math>
</alternatives>
</disp-formula>
</p>
...