Chemical Structure (Display)

Chemical expression, reaction, equation, etc. that is set apart within the text.


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.
Historical Note: This element (<chem-struct>) was significantly remodeled from previous versions of this Tag Set. The current NISO JATS values are backwards compatible with the last NLM version, but not with earlier versions. Specifically, in prior versions the <chem-struct> element was allowed inside the <app>, <app-group>, <body>, <boxed-text>, <disp-quote>, <fig>, <glossary>, <notes>, <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 elements; in those places, it has been replaced by the 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>.
Elsevier Conversion Note: For users of Elsevier Tag Sets, the list class elements can be used to express the <compound-info> element inside a chemical structure.

Related Elements

The expression of a chemical reaction or other chemical structure goes inside the <chem-struct> element. The related 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.


content-type Type of Content
id Document Internal Identifier
specific-use Specific Use
xlink:actuate Actuating the Link
xlink:href Href (Linking Mechanism)
xlink:role Role of the Link
xlink:show Showing the Link
xlink:title Title of the Link
xlink:type Type of Link
xml:base Base
xml:lang Language
xmlns:xlink XLink Namespace Declaration

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 | label | def-list | list | tex-math | mml:math | named-content | styled-content | alternatives | array | code | graphic | media | preformat | fn | target | xref | sub | sup)*


This element may be contained in:


<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>

<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> &plus;
6 O<sub>2</sub> &xrarr; 6 CO<sub>2</sub> &plus; 6 H<sub>2</sub>O