P5: Guidelines for Electronic Text Encoding and Interchange

<rng:element name="code">
<rng:ref name="att.global.attributes"/>
<rng:optional>
 <rng:attribute name="lang">
  <rng:ref name="data.word"/>
 </rng:attribute>
</rng:optional>
<rng:text/>
</rng:element>

element code { att.global.attributes, attribute lang { data.word }?, text }