* debian/control (Standards-Version): Bumped to 3.8.1 (no other changes). * debian/docbook-xsl-doc-html.doc-base (Document), debian/docbook-xsl-doc-pdf.doc-base (Document), debian/docbook-xsl-doc-text.doc-base (Document): Share the same ID instead of using 3 different IDs according to section 2.5.3 of the doc-base manual (closes: #469191).