# http://www.docbook.org/sgml/
#docbook-sgml	md5	http://www.docbook.org/sgml/3.1/docbk31.zip
#docbook-sgml_1	md5	http://www.docbook.org/sgml/4.1/docbk41.zip
#docbook-sgml_2	md5	http://www.docbook.org/sgml/4.2/docbook-4.2.zip
#docbook-sgml_3	md5	http://www.docbook.org/sgml/4.3/docbook-4.3.zip
#docbook-sgml_4	md5	http://www.docbook.org/sgml/4.4/docbook-4.4.zip
#docbook-sgml_5	md5	http://www.docbook.org/sgml/4.5/docbook-4.5.zip

docbook-sgml	md5	http://www.docbook.org/sgml/	>([0-9.]+)/<