oai-pmh.md

@@ -162,7 +162,7 @@ The mapping used:
 - no Media Type mapping, use of mime/type as is
 - open for spdx.org/license (except commercial one)
 - All Vocabs are archived in the index (spdx, oefos2012, iso639, kim/hcrt)
-### spdx 
+### spdx (Licenses)
 oerhub 1.3 and above we introduce Software Package Data Exchange (spdx).
 ```xml
 <lom:description>
@@ -170,9 +170,9 @@ oerhub 1.3 and above we introduce Software Package Data Exchange (spdx).
 </lom:description>
 ```
 > expected URI: `https://spdx.org/licenses/<Identifier>`. `<Identifier>` is the Short Identifier. The link shows the remarks of the license.
-### Language codes and translation
+### ISO Language codes and translation (Languages)
  The data for the language codes and translation is based on https://www.loc.gov/standards/iso639-2/php/code_list.php.
-### kim/hcrt
+### kim/hcrt (Learning Resource Type)
 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