add link to id.html
diff --git a/doc/documentation.html b/doc/documentation.html
index 96a7eef..b769a9b 100644
--- a/doc/documentation.html
+++ b/doc/documentation.html
@@ -27,6 +27,7 @@
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="features.html">features</A>&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="goals.html">goals</A>&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="format.html">format</A>&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
+					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="id.html">id</A>&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="comparison.html">comparison</A>&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;documentation&nbsp;&nbsp;</TD><TD BGCOLOR="#D3D4C5" ALIGN=CENTER>|</TD>
 					<TD           BGCOLOR="#D3D4C5" ALIGN=CENTER NOWRAP>&nbsp;&nbsp;<A CLASS="topnav" HREF="developers.html">developers</A>&nbsp;&nbsp;</TD>