oai-pmh.md

@@ -168,6 +168,24 @@ With oerhub version 1.3 and above we introduce Software Package Data Exchange (s
 This uri is expected: `https://spdx.org/licenses/<Identifier>`. <Identifier> is the Short Identifier. The link shows the remarks of the license.
 ### Language codes and translation
 Our own vocabs are archived in our index (Opensearch). The data for the language codes and translation is based on `https://www.loc.gov/standards/iso639-2/php/code_list.php`.
+### kim/hcrt
+Our controlled vocabs are based from https://skohub.io/dini-ag-kim/hcrt/heads/master/w3id.org/kim/hcrt/scheme.en.html to define the Learning Resource Type.
+
+```xml
+<lom:educational>
+  <lom:learningresourcetype>
+    <lom:source>
+      <lom:langstring xml:lang="x-none">https://w3id.org/kim/hcrt/scheme</lom:langstring>
+    </lom:source>
+    <lom:id>https://w3id.org/kim/hcrt/video</lom:id>
+    <lom:entry>...
+    </lom:entry>
+  </lom:learningresourcetype>
+</lom:educational>
+```
+This uri is expected: `https://w3id.org/kim/hcrt/<Identifier>`.
+
+Example: https://w3id.org/kim/hcrt/video
 
 ## Links
 - https://www.openarchives.org/