Allow empty labels

diff --git a/wdef.xsd b/wdef.xsd
index d3120e93744ae206651fc5bd196ec924d5458d25..438ee86af501cfb614cf12a761979c2ca638e79c 100644 (file)
--- a/wdef.xsd
+++ b/wdef.xsd
@@ -219,7 +219,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
        <!-- Types -->
        <xsd:complexType name="interface-translation">
                <xsd:simpleContent>
-                       <xsd:extension base="wdef:non-empty-normalized-string">
+                       <xsd:extension base="xsd:normalizedString">
                                <xsd:attribute name="interface-lang" use="required">
                                        <xsd:simpleType>
                                                <xsd:restriction base="xsd:normalizedString">