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

<rng:element name="dcs">
<rng:optional>
 <rng:attribute name="local">
  <rng:data type="NCName"/>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="registered">
  <rng:data type="anyURI"/>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="rel" a:defaultValue="eq">
  <rng:choice>
   <rng:value>eq</rng:value>
   <rng:value>subs</rng:value>
   <rng:value>gen</rng:value>
   <rng:text/>
  </rng:choice>
 </rng:attribute>
</rng:optional>
<rng:optional>
 <rng:attribute name="desc">
  <rng:text/>
 </rng:attribute>
</rng:optional>
</rng:element>

element dcs
{
   attribute local { xsd:NCName }?,
   attribute registered { xsd:anyURI }?,
   attribute rel { "eq" | "subs" | "gen" | text }?,
   attribute desc { text }?
}