ave significance only for this font.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/fop/complexscripts/fonts/Substitutable.html#performSubstitution(java.lang.CharSequence, java.lang.String, java.lang.String)">performSubstitution</A></CODE> in interface <CODE><A HREF="../../../../org/apache/fop/complexscripts/fonts/Substitutable.html" title="interface in org.apache.fop.complexscripts.fonts">Substitutable</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cs</CODE> 