by extension elements and allows the extension element
 to return a pass-through attachment which the parent formatting objects should simply
 carry with them but otherwise ignore. This mechanism is used to pass non-standard 
 information from the FO tree through to the layout engine and the renderers.</TD>
</TR>
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<CODE>&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apa