Container element used to hold a group of processing alternatives, for example, a single <graphic> that ships in several formats (tif, gif, and jpeg) or in different resolutions. This element is a physical grouping to contain multiple logically equivalent (substitutable) versions of the same information object. Typically these are processing alternatives and the reader is expected to see only one version of the object.
<alternatives> is neither inherently block nor inline in nature, because the block or inline quality is determined by context and usage. Typical examples for this element are a <graphic> that ships with a document in multiple versions (for example, as a .tif, a .jpeg, and an SVG file); or an <inline-formula> that is available as a .tif (<inline-graphic>), encoded in MathML, as well as encoded in TeX, and as a plain ASCII.
Accessibility: This element, by providing a container for alternative versions of a graphical or media object, enables providing a textual alternative to any graphical or media object as well as providing an enlarged graphic version for accessibility
Accessibility: This element, by providing a container element to related all versions of a graphical or media object, enables “G58: Placing a link to the alternative for time-based media immediately next to the non-text content” and “G69: Providing an alternative for time based media” from the W3C Techniques for WCAG 2.0 (December 2008). This element, by providing a place to always provide a textual alternative to any graphical or media object, enables “G68: Providing a descriptive label that describes the purpose of live audio-only and live video-only content” from the W3C Techniques for WCAG 2.0 (December 2008).
<!ELEMENT alternatives %alternatives-model; >
(array | chem-struct | graphic | inline-graphic | inline-supplementary-material | media | preformat | private-char | supplementary-material | table | textual-form | tex-math | mml:math)+
One or more of any of:
<addr-line>, <alt-title>, <app>, <app-group>, <array>, <article-title>, <attrib>, <award-id>, <bio>, <body>, <bold>, <boxed-text>, <chem-struct>, <chem-struct-wrap>, <collab>, <comment>, <compound-kwd-part>, <compound-subject-part>, <conf-theme>, <def-head>, <disp-formula>, <disp-quote>, <element-citation>, <fig>, <fig-group>, <floats-group>, <funding-source>, <glossary>, <inline-formula>, <italic>, <label>, <license-p>, <meta-value>, <mixed-citation>, <monospace>, <named-content>, <notes>, <overline>, <p>, <product>, <ref-list>, <roman>, <sans-serif>, <sc>, <sec>, <sig-block>, <strike>, <styled-content>, <sub>, <subject>, <subtitle>, <sup>, <supplement>, <supplementary-material>, <table-wrap>, <td>, <term>, <term-head>, <th>, <title>, <trans-subtitle>, <trans-title>, <underline>, <verse-line>
Alternatives to a table inside <table-wrap>:
...
<table-wrap id="pbio-0020328-t003" position="float">
<label>Table 3</label>
<caption>
<title>Systematic Inactivation of SpoIIID-Activated Genes</title>
</caption>
<alternatives>
<graphic xlink:href="pbio.0020328.t003.tif"/>
<graphic xlink:href="pbio.0020328.t003.gif"/>
<table>
<thead>
<tr>
<td>Strain</td>
<td>Description</td>
<td>Sporulation Efficiency (Percent)<sup>a</sup></td>
</tr>
</thead>
<tbody>
<tr>
<td>PY79</td>
<td>wild type</td>
<td>100</td>
</tr>
<tr>
<td>RL2391</td>
<td><italic>asnOΔ::spc</italic></td>
<td>0.000001</td>
</tr>
<tr>
<td>PE563</td>
<td><italic>cotFΔ::cat</italic></td>
<td>83</td>
</tr>
...
</tbody>
</table>
</alternatives>
<table-wrap-foot>
<fn id="nt301">
<p><sup>a</sup> Sporulation efficiency is defined as the
number of heat-resistant spores ...</p>
</fn>
</table-wrap-foot>
</table-wrap>
...
Alternatives to an equation, including MathML and a graphic:
...
<disp-formula id="pbio-0020328-e001">
<alternatives>
<mml:math display='block'><mml:mrow><mml:msub>
<mml:mrow><mml:mtext>Strength</mml:mtext></mml:mrow>
<mml:mi>i</mml:mi></mml:msub>
<mml:mo>=</mml:mo>
<mml:mi>log</mml:mi>
<mml:mo>⁡</mml:mo>
<mml:mfrac>...</mml:mfrac>
<mml:mo>=</mml:mo>
...</mml:math>
<graphic xlink:href="pbio.0020328.e001.gif"/>
</alternatives>
</disp-formula>
...
Alternatives to a table including supplementary material:
...
<table-wrap id="pbio-0020328-t002" position="float">
<label>Table 2</label>
<caption>
<title>Genes Activated in the Mother-Cell Line of Gene Expression</title>
</caption>
<alternatives>
<graphic xlink:href="pbio.0020328.t002.tif"/>
<table>...</table>
<supplementary-material id="S1" xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:title="local_file" xlink:href="pbio-0020328-t002.xls"
mimetype="application/vnd.ms-excel">
<label>Supporting Material</label>
<caption>
<p>Supplementary Microsoft Excel file (raw study data) supplied by authors.</p>
</caption>
</supplementary-material>
</alternatives>
<table-wrap-foot>...</table-wrap-foot>
</table-wrap>
...
An example of a triple bond glyph. To a chemist, a triple bond is not the same as Unicode x2261, but using alternatives, as shown below, is sometimes the easiest way to display the character visually and still stay within Unicode:
...
<alternatives>
<textual-form specific-use="unicode-look-alike">≡</textual-form>
<private-char name="Triple Bond" description="Chemistry Triple Bond">
<glyph-data id="tbond" format="PBM" resolution="300"
x-size="16" y-size="32">
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0001111111111111111111111100000
0000000000000000000000000000000
0000000000000000000000000000000
0001111111111111111111111100000
0000000000000000000000000000000
0000000000000000000000000000000
0001111111111111111111111100000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
0000000000000000000000000000000
</glyph-data></private-char>
</alternatives>
...
JATS-common1.ent