code: public void setKey(KeyDeclaration v)
    {
  
      if (null == m_keyDeclarations)
        m_keyDeclarations = new Vector();
  
      m_keyDeclarations.addElement(v);
    }
docs: Set the "xsl:key" property.
  @see <a href="http://www.w3.org/TR/xslt#key">key in XSLT Specification</a>
  
  @param v KeyDeclaration element to add to the list of key declarations