Regelsatz: Fehler, wenn Metadatum nicht exportiert

src/ruleset.rnc

@@ -18,6 +18,16 @@ Preferences =
    }
 
 MetadataTypeDef =
+   [
+      s:pattern [
+         s:rule [
+            context = "metadata[parent::DocStrctType]" s:assert [
+               test = "/Preferences/METS/Metadata/InternalName = ."
+               "Das Metadatum '" s:value-of [ select = "." ] "' wird nicht exportiert."
+            ]
+         ]
+      ]
+   ]
    element MetadataType {
       attribute type { "person" | "identifier" }?,
       (

test/ruleset.xspec

@@ -32,6 +32,11 @@
           <DocStrctType>
             <metadata>is-defined</metadata>
           </DocStrctType>
+          <METS>
+            <Metadata>
+              <InternalName>is-defined</InternalName>
+            </Metadata>
+          </METS>
         </Preferences>
       </context>
       <expect-not-assert/>
@@ -42,6 +47,24 @@
           <DocStrctType>
             <metadata>is-not-defined</metadata>
           </DocStrctType>
+          <METS>
+            <Metadata>
+              <InternalName>is-defined</InternalName>
+            </Metadata>
+          </METS>
+        </Preferences>
+      </context>
+      <expect-assert/>
+    </scenario>
+    <scenario label="Metadatum wird nicht exportiert">
+      <context>
+        <Preferences xmlns="">
+          <MetadataType>
+            <Name>is-defined</Name>
+          </MetadataType>
+          <DocStrctType>
+            <metadata>is-not-defined</metadata>
+          </DocStrctType>
         </Preferences>
       </context>
       <expect-assert/>