echo" * pkgatype is the type of pkga and can be one of binary or source" >&2
echo" * pkgbprovides is the provides field of pkgb and can be anything like none (no provides), pkgc, pkgc:amd64 or pkgc:i386" >&2
echo" * pkgaarch is the architecture of pkga and can be any valid architecture or none in case pkga is a source package" >&2
echo" * pkgbarch is the architecture of pkgb and can be any valid architecture" >&2
echo" * pkgama is the multi-arch value of pkga and can be any valid multi-arch value or none in case pkga is a source package" >&2
echo" * pkgbma is the multi-arch value of pkgb and can be any valid multi-arch value" >&2
echo" * debrel is the relationship of pkga to pkgb and can be one of depends or conflicts" >&2
echo" * debvpkg is the dependency relationship value and can be any anything like pkgb, pkgb:amd64, pkgb:i386, pkgb:any, pkgc, pkgc:amd64, pkgc:i386, pkgc:any, pkgb:native or pkgc:native" >&2
echo"" >&2
echo"If no arguments are given, then all legal permutations are printed to standard output, each on one line." >&2
echo"" >&2
echo"This allows one to test all situations like this:" >&2