table.cell.border.thickness — Specifies the thickness of table cell borders
<xsl:param name="table.cell.border.thickness">
<xsl:choose>
<xsl:when test="contains($stylesheet.result.type,'html')">1px</xsl:when>
<xsl:otherwise>0.5pt</xsl:otherwise>
</xsl:choose>
</xsl:param>
If non-zero, specifies the thickness of borders on table cells. See CSS
To control properties of cell borders in HTML output, you must also turn on the
table.borders.with.css parameter.