code: public void setNamespaceAlias(NamespaceAlias na)
    {
  
      if (m_prefix_aliases == null)
        m_prefix_aliases = new Vector();
  
      m_prefix_aliases.addElement(na);
    }
docs: Set the "xsl:namespace-alias" property.
  @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT Specification</a>
  
  @param na NamespaceAlias elemeent to add to the list