Document properties for property files having constructs like
        <ns:name>value</ns:name>

        :param content_type: ``contenttypes.CT_CORE_PROPS`` or ``contenttypes.CT_EXT_PROPS``
        :return: mapping like {'property name': 'property value', ...}

def _tagValuedProperties(self, content_type):
        """Document properties for property files having constructs like
        <ns:name>value</ns:name>

        :param content_type: ``contenttypes.CT_CORE_PROPS`` or ``contenttypes.CT_EXT_PROPS``
        :return: mapping like {'property name': 'property value', ...}
        """
        rval = {}
        if not content_type in self.content_types.listMetaContentTypes:
            # We fail silently
            return rval
        for tree in self.content_types.getTreesFor(self, content_type):
            for elt in tree.getroot().getchildren():
                tag = elt.tag.split('}')[-1] # Removing namespace if any
                rval[toUnicode(tag)] = toUnicode(elt.text)
        return rval