substitute 

<h:div class="summary">A flag on 'arg' to indicate that the value can be substituted.</h:div>
<h:div class="description">This is still experimental. The value may be an XPath expression, at present all attributes (".//@*") are processed. If an attribute contains _ijk_ where the name of the arg is 'ijk' this string is replaced by the value of ijk, e.g. if arg with name ijk has a value of 2 then 'm_ijk__z3' becomes 'm2_z3'. substitute="." replaces this element by its value</h:div>
<h:div class="summary">2006-05-21: PMR added attribute.</h:div>

Attribute Information

Used By

Attribute Group substitute

Source 

<xsd:attribute name="substitute" id="att.substitute" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>
      <h:div class="summary">A flag on 'arg' to indicate that the value can be substituted.</h:div>
      <h:div class="description">This is still experimental. The value may be an XPath expression, at present all attributes (".//@*") are processed. If an attribute contains _ijk_ where the name of the arg is 'ijk' this string is replaced by the value of ijk, e.g. if arg with name ijk has a value of 2 then 'm_ijk__z3' becomes 'm2_z3'. substitute="." replaces this element by its value</h:div>
      <h:div class="summary">2006-05-21: PMR added attribute.</h:div>
    </xsd:documentation>
  </xsd:annotation>
</xsd:attribute>

Sample