def build(self, builder):
        """Build XML by appending to builder"""
        params = dict(OID=self.oid,
                      Name=self.name)
        if self.location_type:
            params.update(dict(LocationType=self.location_type.value))
        # mixins
        self.mixin()
        self.mixin_params(params)
        builder.start("Location", params)
        for mdv in self.metadata_versions:
            mdv.build(builder)
        builder.end("Location")
Build XML by appending to builder