DOCBOOK-APPS: How can I get stylesheet to bold?

1) Problem Description:

How can I get the html style sheet to bold
for markup <emphasis role="strong"> ?

2) DocBook Xml DTD: V4.1.2 
3) DocBook Style:   V1.41
4) Style Sheet:     html xtchunk.xsl
5) Xt:              V19991105 under Xae
6) Xp:              V0.5 under Xae
7) Xae:             V1.0 beta 6


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Jeffrey L. Franks  (Web)  http://www.motiftools.org
                   (Mail)