Font family in table content: how to change?

[Steve Whitlatch <swhitlat@getnet.net>]

Hello, 

I'm trying to set the font-family for both headers and cells in 
tables, using an xsl customization stylesheet. 

I tried several things and thought for sure that the following would 
work:
***************
 <xsl:attribute-set name="table.content.properties">
  <xsl:attribute name="font-family">$sans.font.family</xsl:attribute>
</xsl:attribute-set>
***************

But no. Perhaps there is no such attribute. The tables keep using the 
body font, and FOP generates a storm of the following font-related 
error messages for each table:
**************
[ERROR] unknown font ZapfDingbats,normal,bold so defaulted font to any
[ERROR] unknown font ZapfDingbats,italic,normal so defaulted font to 
any
[ERROR] unknown font ZapfDingbats,normal,bold so defaulted font to any
.
.
.
**************

How can I set the font-family used in tables (both heads and cells) 
and correct the errors? Also, why is DocBook+DocBook_XSL trying to 
use ZapfDingbats somehow in connection with tables? It must be some 
default. 

Thanks, 

Steve Whitlatch