anchor.diff:  #
   #  dina-font-pcf = callPackage ../data/fonts/dina-pcf { };
   #
  -#  docbook5 = callPackage ../data/sgml+xml/schemas/docbook-5.0 { };
  -#
  +  docbook5 = callPackage ../data/sgml+xml/schemas/docbook-5.0 { };
  +
     docbook_sgml_dtd_31 = callPackage ../data/sgml+xml/schemas/sgml-dtd/docbook/3.1.nix { };
  -#
  -#  docbook_sgml_dtd_41 = callPackage ../data/sgml+xml/schemas/sgml-dtd/docbook/4.1.nix { };
  -#
  +
  +  docbook_sgml_dtd_41 = callPackage ../data/sgml+xml/schemas/sgml-dtd/docbook/4.1.nix { };
  +
     docbook_xml_dtd_412 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.1.2.nix { };
   
     docbook_xml_dtd_42 = callPackage ../data/sgml+xml/schemas/xml-dtd/docbook/4.2.nix { };
  
positive.code: #
  #  libtirpc = callPackage ../development/libraries/ti-rpc { };
  #
  #  libshout = callPackage ../development/libraries/libshout { };
  #
  #  libqb = callPackage ../development/libraries/libqb { };
  #
  
negative.code: #
  #  aacskeys = callPackage ../development/libraries/aacskeys { };
  #
    aalib = callPackage ../development/libraries/aalib { };
  #
  #  accelio = callPackage ../development/libraries/accelio { };
  #
  