Note that it should be a valid HTML document. It does not need to contain any visible text however.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <META NAME="Author" CONTENT="Koen D'Hondt"> <META HTTP-EQUIV="Description" CONTENT="XmHTML font mapping."> </head> <body> <!-- Sample font map definition --> <!-- various forms of helvetica --> <!-- verdana is helvetica on macintosh --> <!-- all possible sizes, plain style --> <font face="verdana,helvetica" size="1"></font> <font face="verdana,helvetica" size="2"></font> <font face="verdana,helvetica" size="3"></font> <font face="verdana,helvetica" size="4"></font> <font face="verdana,helvetica" size="5"></font> <font face="verdana,helvetica" size="6"></font> <font face="verdana,helvetica" size="7"></font> <!-- all possible sizes, bold style --> <b><font face="verdana,helvetica" size="1"></font></b> <b><font face="verdana,helvetica" size="2"></font></b> <b><font face="verdana,helvetica" size="3"></font></b> <b><font face="verdana,helvetica" size="4"></font></b> <b><font face="verdana,helvetica" size="5"></font></b> <b><font face="verdana,helvetica" size="6"></font></b> <b><font face="verdana,helvetica" size="7"></font></b> <!-- all possible sizes, italic style --> <i><font face="verdana,helvetica" size="1"></font></i> <i><font face="verdana,helvetica" size="2"></font></i> <i><font face="verdana,helvetica" size="3"></font></i> <i><font face="verdana,helvetica" size="4"></font></i> <i><font face="verdana,helvetica" size="5"></font></i> <i><font face="verdana,helvetica" size="6"></font></i> <i><font face="verdana,helvetica" size="7"></font></i> <!-- all possible sizes, bold-italic style --> <b><i><font face="verdana,helvetica" size="1"></font></i></b> <b><i><font face="verdana,helvetica" size="2"></font></i></b> <b><i><font face="verdana,helvetica" size="3"></font></i></b> <b><i><font face="verdana,helvetica" size="4"></font></i></b> <b><i><font face="verdana,helvetica" size="5"></font></i></b> <b><i><font face="verdana,helvetica" size="6"></font></i></b> <b><i><font face="verdana,helvetica" size="7"></font></i></b> <!-- arial is helvetica on ms-windows --> <!-- all possible sizes, plain style --> <font face="arial,helvetica" size="1"></font> <font face="arial,helvetica" size="2"></font> <font face="arial,helvetica" size="3"></font> <font face="arial,helvetica" size="4"></font> <font face="arial,helvetica" size="5"></font> <font face="arial,helvetica" size="6"></font> <font face="arial,helvetica" size="7"></font> <!-- all possible sizes, bold style --> <b><font face="arial,helvetica" size="1"></font></b> <b><font face="arial,helvetica" size="2"></font></b> <b><font face="arial,helvetica" size="3"></font></b> <b><font face="arial,helvetica" size="4"></font></b> <b><font face="arial,helvetica" size="5"></font></b> <b><font face="arial,helvetica" size="6"></font></b> <b><font face="arial,helvetica" size="7"></font></b> <!-- all possible sizes, italic style --> <i><font face="arial,helvetica" size="1"></font></i> <i><font face="arial,helvetica" size="2"></font></i> <i><font face="arial,helvetica" size="3"></font></i> <i><font face="arial,helvetica" size="4"></font></i> <i><font face="arial,helvetica" size="5"></font></i> <i><font face="arial,helvetica" size="6"></font></i> <i><font face="arial,helvetica" size="7"></font></i> <!-- all possible sizes, bold-italic style --> <b><i><font face="arial,helvetica" size="1"></font></i></b> <b><i><font face="arial,helvetica" size="2"></font></i></b> <b><i><font face="arial,helvetica" size="3"></font></i></b> <b><i><font face="arial,helvetica" size="4"></font></i></b> <b><i><font face="arial,helvetica" size="5"></font></i></b> <b><i><font face="arial,helvetica" size="6"></font></i></b> <b><i><font face="arial,helvetica" size="7"></font></i></b> <!-- Inform ourselves that we have finished loading the font map --> Default font map loaded. </body> </html>