subject 

A path allowing more precise specification of nodes. The path expression
is evaluated in the context of the context node of the current rule. If no subject
attribute is specified, the current subject node may be used.

Attribute Information

Used By

Attribute Group sch:linkable

Source 

<xs:attribute name="subject" type="sch:pathValue">
  <xs:annotation>
    <xs:documentation>A path allowing more precise specification of nodes. The path expression is evaluated in the context of the context node of the current rule. If no subject attribute is specified, the current subject node may be used.</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample