diff --git a/schema/edxml.rng b/schema/edxml.rng
index c9f78af393febc8a85284c596cf59cf8e18f894c..9a3b8330cb5471f96414efa3838c3bf450db0792 100644
--- a/schema/edxml.rng
+++ b/schema/edxml.rng
@@ -1799,6 +1799,9 @@
                 <optional>
                     <ref name="model.analysis"/>
                 </optional>
+                <optional>
+                    <text/>
+                </optional>
             </oneOrMore>
             <sch:pattern>
                 <sch:rule context="*:damage[parent::*:column]">