label.from.part — Renumber chapters in each part?
<xsl:param name="label.from.part" select="'0'"></xsl:param>
If label.from.part is non-zero, components (chapters, appendixes, etc.) will be numbered from 1 in each part. Otherwise, they will be numbered monotonically throughout each book.
label.from.part
chapter
appendixe
part
book