# Dpkg::Deps::KnownFacts - phpMan

## NAME
    [Dpkg::Deps::KnownFacts] - list of installed real and virtual packages

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

## METHODS
    $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).

    $facts->evaluate_simple_dep()
        This method is private and should not be used except from within
        [Dpkg::Deps].

## CHANGES
  Version 2.00 (dpkg 1.20.0)
    Remove method: $facts->check_package().

  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check_package() is obsolete,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.