Problems for source package w3-dtd-mathml

BuildDepends

Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on mipsel. Package w3-dtd-mathml does not exist on mipsel.
Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on s390x. Package w3-dtd-mathml does not exist on s390x.
Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on mips64el. Package w3-dtd-mathml does not exist on mips64el.
Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on armel. Package w3-dtd-mathml does not exist on armel.
Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on mips. Package w3-dtd-mathml does not exist on mips.
Package declares a build time dependency on debhelper (>= 7.0.50~) which cannot be satisfied on ppc64el. Package w3-dtd-mathml does not exist on ppc64el.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on mips. Package w3-dtd-mathml does not exist on mips.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on ppc64el. Package w3-dtd-mathml does not exist on ppc64el.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on mips64el. Package w3-dtd-mathml does not exist on mips64el.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on armel. Package w3-dtd-mathml does not exist on armel.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on s390x. Package w3-dtd-mathml does not exist on s390x.
Package declares a build time dependency on xml-core (>= 0.6) which cannot be satisfied on mipsel. Package w3-dtd-mathml does not exist on mipsel.