diff --git a/KorAP_schemas/span.rng b/KorAP_schemas/span.rng
index 029c920..feb2835 100644
--- a/KorAP_schemas/span.rng
+++ b/KorAP_schemas/span.rng
@@ -77,6 +77,9 @@
           <data type="NCName"/>
         </attribute>
       </optional>-->
+      <attribute name="l">
+        <data type="integer"/>
+      </attribute>
       <attribute name="from">
         <choice>
           <data type="integer"/>