<classRef>

<classRef> points to the specification for an attribute or model class which is to be included in a schema
組件 tagdocs — 22 Documentation Elements
除全域屬性以外 att.readFrom (@source)
key the identifier used for the required class within the source indicated.
狀態 必備的
資料類型 

<rng:data type="NCName"/>
xsd:NCName
屬於
model.oddRef
可包含 空白元素
宣告 

<rng:element name="classRef">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.readFrom.attributes"/>
 <rng:attribute name="key">
  <rng:data type="NCName"/>
 </rng:attribute>
 <rng:empty/>
</rng:element>
element classRef
{
   att.global.attributes,
   att.readFrom.attributes,
   attribute key { xsd:NCName },
   empty
}
例子

<!-- example needed -->