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<chem-struct-wrap> Chemical Structure Wrapper

Wrapper element for a chemical expression, reaction, equation, etc. that is set apart from the text; includes any number, label, or caption that accompanies the chemical expression.

Usage/Remarks

A <chem-struct-wrap> may be numbered, programmatically, by a formatting application or by preserving the number inside a <label> element.
The chemical expressions inside this element may be formally tagged as <chem-struct> elements or merely expressed as one or more display objects.
Position
The @position attribute may be used to indicate whether this element must be anchored at its exact location within the text or whether it may float (for example, to the top of the next page, into the next column, to the end of a logical file, or within a separate window).
NLM DTD Historical Note
This element (<chem-struct-wrap>) 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, the <chem-struct-wrap> element replaces the <chem-struct-wrapper> element, which is no longer available.
Related Elements
The expression of a chemical reaction or other chemical structure goes inside the <chem-struct> element. The element <chem-struct-wrap> is an outer wrapper that may hold, for example, both a chemical reaction and its caption or three related chemical expressions. In other words, this element does not contain a chemical expression; it contains other elements (such as <chem-struct>s) that contain such expressions.
Attributes
content-type
orientation (default = portrait)
position (default = float)
specific-use
supplemental

Multi-lang Attributes

lang-focus
lang-focus-custom
lang-group
lang-source
lang-source-custom
lang-translate
lang-variant
lang-variant-custom

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<abstract>, <ack>, <answer>, <app>, <app-group>, <bio>, <body>, <boxed-text>, <disp-quote>, <explanation>, <fig>, <floats-group>, <glossary>, <license-p>, <named-content>, <notes>, <option>, <p>, <question>, <question-preamble>, <ref-list>, <sec>, <styled-content>, <supplementary-material>, <table-wrap>, <td>, <term>, <th>, <trans-abstract>
Description
The following, in order:
Content Model
<!ELEMENT  chem-struct-wrap
                        %chem-struct-wrap-model;                     >
Expanded Content Model
((object-id)*, label?, (caption)*, (legend)*, (abstract)*, (kwd-group)*,
(subj-group)*, (alt-text | long-desc | email | ext-link | uri)*, (alternatives | chem-struct | code
| graphic | media | preformat | textual-form)+, (attrib | permissions)*)
Tagged Sample

With <caption> and alternative structures 

...
<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"></graphic>

  <chem-struct>C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> &plus;
   6 O<sub>2</sub> &xrarr; 6 CO<sub>2</sub> &plus; 6 H<sub>2</sub>O
  </chem-struct>

 </alternatives>
</chem-struct-wrap>
...
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