Use locationmap for resource resolution. Exposes internal stylesheets
as {lm:simplifiedDocbook.transform.*.*}
Better handling of link text.
Created the initial plugin by copying map snippets and
samples from Forrest Core.
docbook2document.xsl: remove unnecessary / from template matches.
docbook2document.xsl: docinfo element. never in OASIS Docbook XML DTD
docbook2document.xsl: handle the xref and xreflabel.
Remove DTDs from Core.