Language Resource Management -- Morpho-syntactic Annotation Framework (MAF)

<rng:element name="wordForm">
<rng:optional>
 <rng:attribute name="lemma">
  <rng:data type="string" datatypeLibrary=""/>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="form">
  <rng:data type="string" datatypeLibrary=""/>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="entry">
  <rng:data type="anyURI"/>
 </rng:attribute>
</rng:optional>
<rng:choice>
 <rng:ref name="att.wordForm.tokens"/>
 <rng:zeroOrMore>
  <rng:ref name="token"/>
 </rng:zeroOrMore>
</rng:choice>
<rng:zeroOrMore>
 <rng:ref name="wordForm"/>
</rng:zeroOrMore>
<rng:optional>
 <rng:choice>
  <rng:ref name="att.wordForm.content"/>
  <rng:ref name="fs"/>
 </rng:choice>
</rng:optional>
</rng:element>

element wordForm
{
   attribute lemma { string }?,
   attribute form { string }?,
   attribute entry { xsd:anyURI }?,
   ( att.wordForm.tokens | token* ),
   wordForm*,
   ( att.wordForm.content | fs )?
}