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<chem-struct> Chemical Structure (Display)
Chemical expression, reaction, equation, etc. that is set apart within the text.
Usage/Remarks
This element accommodates chemical reactions expressed in many ways: as text with
emphasis tags, subscripts, and superscripts; as a preformatted area (<preformat>); as an included graphic, etc. The linking attributes may also be used to point to
an external source such as a URI.
Display/Formatting Note
A chemical structure is assumed to be anchored at its position within the text.
NLM DTD Historical Note
This element (<chem-struct>) was significantly remodeled
from previous versions of this Tag Set. The current NISO JATS values are backward
compatible with all JATS versions and
with the last NLM version, but not with earlier NLM DTD versions. Specifically, in
prior versions the <chem-struct> element
was allowed inside the <app>,
<app-group>, <body>, <boxed-text>, <disp-quote>,
<fig>, <glossary>, <ref-list>, <sec>, <supplementary-material>, and <table-wrap> elements; in those places, it has been
replaced by the <chem-struct-wrap>
element.
Only <license-p>, <named-content>, <p>, and <styled-content> elements can contain either <chem-struct> or <chem-struct-wrap>.
Attributes
Multi-lang Attributes
Namespaces
Models and Context
May be contained in
<alternatives>, <alt-title>, <article-title>, <attrib>, <bold>, <chapter-title>, <chem-struct-wrap>, <comment>, <compound-kwd-part>, <compound-subject-part>, <conf-theme>, <def-head>, <disp-formula>, <element-citation>, <fixed-case>, <inline-formula>, <italic>, <license-p>, <meta-value>, <mixed-citation>, <monospace>, <named-content>, <overline>, <p>, <part-title>, <product>, <roman>, <sans-serif>, <sc>, <see>, <see-also>, <source>, <strike>, <styled-content>, <sub>, <subject>, <subtitle>, <sup>, <supplement>, <support-source>, <td>, <term>, <term-head>, <th>, <title>, <trans-source>, <trans-title>, <underline>, <verse-line>
Description
Any combination of:
- Text, numbers, or special characters
- Accessibility Elements
- Linking Elements
- <break> Line Break
- Emphasis Elements
- <object-id> Object Identifier
- Lists
- <code> Code
- <graphic> Graphic
- <media> Media Object
- <preformat> Preformatted Text
- Internal Linking Elements
- Baseline Change Elements
Content Model
<!ELEMENT chem-struct %chem-struct-model; >
Expanded Content Model
(#PCDATA | alt-text | long-desc | email | ext-link | uri | break | bold | fixed-case | italic | monospace | overline | roman | sans-serif | sc | strike | underline | ruby | object-id | def-list | list | code | graphic | media | preformat | fn | target | xref | sub | sup)*
Tagged Sample
Alternative to <graphic>
...
<chem-struct-wrap>
<caption>
<p>Chemical equation for the oxidation of glucose into
cardon dioxide and water. Unlike combustion, metabolic
pathways involving glycolysis and respiration control
the release of energy during oxidation, thereby permitting
its storage in ATP molecules. This slow release of energy
via chain reactions with multiple steps can be grouped
into four stages.</p>
</caption>
<alternatives>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="pq0209587032" specific-use="internet"/>
<chem-struct>C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> +
6 O<sub>2</sub> ⟶ 6 CO<sub>2</sub> + 6 H<sub>2</sub>O
</chem-struct>
</alternatives>
</chem-struct-wrap>
...
Related Resources
- See: Accessibility