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<label> Label (of an Equation, Figure, Reference, etc.)

Number and/or prefix word placed at the beginning of display elements (for example, equation, statement, figure).

Usage/Remarks

As an example, a label placed at the beginning of an equation (<disp-formula>) could be a number such as <label>Equation 3.</label>, <label>(3)</label>, or <label>3.</label>. A label before a statement such as a Proof or Lemma, could be a word such as <label>Proof</label> or <label>Hypothesis</label>.
Accessibility
Sometimes a <label> needs to be pronounced in a way that is not reflected in its content or its tagging. The @alt attribute can be used to record the pronunciation for screen readers and other accessibility devices. For example, a cross-reference to a figure might be pronounced as “Figure 3”. 
<label alt="figure 3">Fig III.</label>
Attributes
alt

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<answer>, <answer-set>, <disp-formula>, <disp-formula-group>, <explanation>, <list-item>, <option>, <question>, <question-preamble>, <question-wrap-group>, <statement>
Description
Text, numbers, or special characters, zero or more
Content Model
<!ELEMENT  label        (#PCDATA %label-elements;)*                  >
Expanded Content Model

(#PCDATA)*

Tagged Sample

Hypothesis in <statement> 

<article dtd-version="1.3d2">
 <front>...</front>
 <body>
  ...
  <p>Industrial buyers categorise foreign countries
   according to their level of technological achievement
   and subsequently differentiate their perceptions of
   these countries accordingly ... The following
   hypothesis is posited:
   <statement>
    <label>Hypothesis 1</label>
    <p>Buyer preferences for companies are influenced 
     by factors extrinsic to the firm attributable to, 
     and determined by, country-of-origin effects.</p>
   </statement>
  </p>
  ...
 </body>
 <back>...</back>
</article>