+HTML=altusmetrum.html altos.html telemetry.html
+PDF=altusmetrum.pdf altos.pdf telemetry.pdf
+DOC=$(HTML) $(PDF)
+HTMLSTYLE=/usr/share/xml/docbook/stylesheet/docbook-xsl/html/docbook.xsl
+FOSTYLE=/usr/share/xml/docbook/stylesheet/docbook-xsl/fo/docbook.xsl
+PDFSTYLE=