diff --git a/resources/schema/inventory.xsd b/resources/schema/inventory.xsd
index be4f8b9..6a155b9 100644
--- a/resources/schema/inventory.xsd
+++ b/resources/schema/inventory.xsd
@@ -296,6 +296,13 @@
         <xsd:attribute name="kol" type="xsd:string"/> <!-- legacy attribute for the word's lemma -->
         <xsd:attribute name="lexical_unit_lexeme_id" type="xsd:int"/> <!-- ID within its lexical unit -->
         <xsd:attribute name="lexeme_id" type="xsd:int"/> <!-- ID of the component's lexeme -->
+        <xsd:attribute name="space"> <!-- is the component followed by a space? only used if it isn't -->
+          <xsd:simpleType>
+            <xsd:restriction base="xsd:string">
+              <xsd:enumeration value="false"/>
+            </xsd:restriction>
+          </xsd:simpleType>
+        </xsd:attribute>
       </xsd:extension>
     </xsd:simpleContent>
   </xsd:complexType>