Description
This element can hold markup of a mathematical of chemical formula, or references marked-up formula data in an external data file. This will usually be a processing instruction containing MathML markup (the element cannot currently directly contain MathML elements):
<unnummatheqn id="UM0001">
<equation>
<texstructure><?TeX [ {a_i ,b^j } ] = \delta _i^j . ?></texstructure>
<graphic entityref="UM0001" width="83" height="25"/>
<formula>
<?MathML
<math display='block'><mrow><mo stretchy='false'>[</mo><msub><mi>a</mi><mi>i</mi> ...</math>
?>
</formula>
</equation>
</unnummatheqn>
Alternatively, this element can be empty, but reference a file (directly by file path and name, or via an entity declaration) that contains MathML markup (perhaps in the form of an XML fragment that contains the processing instruction):
<formula fileref="math/formula1.xml"/>
or:
<!ENTITY formula1 SYSTEM "math/formula1.xml">
...
<texstructure entityref="formula1/>
Parent Elements
The elements listed below may directly contain this element.
They are "parent" elements. Elements in referenced groups are included, up to two levels of group nesting.
Model Diagram
The DTD model for this element:
--+(choice of TEXT with elements repeated)
|
|--+(choice) [Formatting in Text]
| |
| |-- sub -- (TEXT and elements)
| |
| |-- sup -- (TEXT and elements)
| |
| |-- b -- (TEXT and elements)
| |
| |-- i -- (TEXT and elements)
| |
| |-- smallcaps -- (TEXT and elements)
| |
| |-- u -- (TEXT and elements)
| |
| |-- box -- (TEXT and elements)
| |
| |-- roman -- (TEXT and elements)
| |
| |-- script -- (TEXT and elements)
| |
| |-- tt -- (TEXT and elements)
| |
| |-- strikethrough -- (TEXT and elements)
| |
| |-- overline -- (TEXT and elements)
| |
| |-- newpage
| |
| |-- query -- TEXT
DTD Definition
The DTD contains the following element and attribute definitions
(note that embedded links are to definitions within the DTD page of this guide):
<!ELEMENT formula (#PCDATA | %FormattingInText;)*>
<!ATTLIST formula
%a-group-FileRefAttrs;
%a-group-InteractiveAttrs;
%a-group-CommonIDAttrs;>
.
Defined in DTD section
Block-level Content : Maths and Chemistry
General Attributes (shared with other elements)