xmlcatalog --noout --add "delegatePublic" \
  "-//OASIS//DTD DocBook XML 5.0//EN" \
  "file:///usr/share/xml/docbook/schema/dtd/5.0/catalog.xml" \
  /etc/xml/catalog &&
xmlcatalog --noout --add "delegateSystem" \
  "http://docbook.org/xml/5.0/dtd/" \
  "file:///usr/share/xml/docbook/schema/dtd/5.0/catalog.xml" \
  /etc/xml/catalog &&
xmlcatalog --noout --add "delegateURI" \
  "http://docbook.org/xml/5.0/dtd/" \
  "file:///usr/share/xml/docbook/schema/dtd/5.0/catalog.xml" \
  /etc/xml/catalog &&
xmlcatalog --noout --add "delegateURI" \
  "http://docbook.org/xml/5.0/rng/"  \
  "file:///usr/share/xml/docbook/schema/rng/5.0/catalog.xml" \
  /etc/xml/catalog &&
xmlcatalog --noout --add "delegateURI" \
  "http://docbook.org/xml/5.0/sch/"  \
  "file:///usr/share/xml/docbook/schema/sch/5.0/catalog.xml" \
  /etc/xml/catalog &&
xmlcatalog --noout --add "delegateURI" \
  "http://docbook.org/xml/5.0/xsd/"  \
  "file:///usr/share/xml/docbook/schema/xsd/5.0/catalog.xml" \
  /etc/xml/catalog
