Container element for use only inside <alternatives> that will hold text and mixed content as an alternative to, for example, a graphic.
The typical case is inside a display equation (<disp-formula>), when the formula is present in several forms, for example as a MathML encoded equation, a plain text alternative which uses ASCII characters and superscripts, and a <graphic>. The text alternative is coded as a <textual-form> element.
<!ELEMENT textual-form (#PCDATA | %textual-form-elements;)* >
(#PCDATA | bold | italic | monospace | overline | roman | sans-serif | sc | strike | underline | inline-graphic | private-char | tex-math | mml:math | named-content | styled-content | sub | sup)*
Any combination of:
...
<disp-formula>
<alternatives>
<textual-form>(a + 3)<sup>2</sup> - (10 - b) = 24</textual-form>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink"
xlink:href="fors2682.f3" >
<object-id>463492</object-id>
</graphic>
<mml:math>
<mml:mrow>
<mml:msup>
<mml:mfenced>
<mml:mrow>
<mml:mi>a</mml:mi>
<mml:mo>+</mml:mo>
<mml:mn>3</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mn>2</mml:mn>
</mml:msup>
<mml:mo>−</mml:mo>
<mml:mfenced>
<mml:mrow>
<mml:mi>10</mml:mi>
<mml:mo>−</mml:mo>
<mml:mn>b</mml:mn>
</mml:mrow>
</mml:mfenced>
<mml:mo>=</mml:mo>
<mml:mn>24</mml:mn>
</mml:mrow>
</mml:math>
</alternatives>
</disp-formula>
...
common3.ent