Provided by: libdpkg-perl_1.19.7ubuntu2_all bug


       Dpkg::Deps::KnownFacts - list of installed real and virtual packages


       This object represents a list of installed packages and a list of virtual packages
       provided (by the set of installed packages).


       $facts = Dpkg::Deps::KnownFacts->new();
           Creates a new object.

       $facts->add_installed_package($package, $version, $arch, $multiarch)
           Records that the given version of the package is installed. If $version/$arch is
           undefined we know that the package is installed but we don't know which
           version/architecture it is. $multiarch is the Multi-Arch field of the package. If
           $multiarch is undef, it will be equivalent to "Multi-Arch: no".

           Note that $multiarch is only used if $arch is provided.

       $facts->add_provided_package($virtual, $relation, $version, $by)
           Records that the "$by" package provides the $virtual package. $relation and $version
           correspond to the associated relation given in the Provides field (if present).

       ($check, $param) = $facts->check_package($package)
           $check is one when the package is found. For a real package, $param contains the
           version. For a virtual package, $param contains an array reference containing the list
           of packages that provide it (each package is listed as [ $provider, $relation,
           $version ]).

           This function is obsolete and should not be used. Dpkg::Deps::KnownFacts is only meant
           to be filled with data and then passed to Dpkg::Deps methods where appropriate, but it
           should not be directly queried.

           This method is private and should not be used except from within Dpkg::Deps.


   Version 1.01 (dpkg 1.16.1)
       New option: Dpkg::Deps::KnownFacts->add_installed_package() now accepts 2 supplementary
       parameters ($arch and $multiarch).

       Deprecated method: Dpkg::Deps::KnownFacts->check_package() is obsolete, it should not have
       been part of the public API.

   Version 1.00 (dpkg 1.15.6)
       Mark the module as public.