#4560 - Describe how to use ELK to process Snomed before import

- Add recommendation to use ELK to generate missing statements and to enable the read-only mode

inception/inception-kb/src/main/resources/de/tudarmstadt/ukp/inception/kb/yaml/knowledgebase-profiles.yaml

@@ -386,6 +386,17 @@ snomed-ct:
       - Convert the _RD2_ data to _OWL Functional Syntax_ using the [snomed-owl-toolkil](https://github.com/IHTSDO/snomed-owl-toolkit)
       - Convert the _OWL Functional Syntax_ data to _RDF/XML_ e.g. using [Protégé](https://protege.stanford.edu)
       - Import the _RDF/XML_ file into the knowledge base created from this profile (this may take a while)
+      
+      At this point, you will be able to link against SNOMED concepts, but the tree browser will not be able to find
+      certain concepts. To fix this, an additional step has to be performed:
+      
+      - Obtain a copy for the [ELK Reasoner standalone executable](https://github.com/liveontologies/elk-reasoner/releases)
+      - Use ELK to classify the SNOMED _OWL Functional Syntax_ data: <br>
+        `java -jar elk-standalone.jar -i snomed-file.owl -c -o snomed-classified-file.owl`
+      - Convert the classified file produced by ELK from _OWL Functional Syntax_ data to _RDF/XML_ e.g. using [Protégé](https://protege.stanford.edu)
+      - Import that convered classified _RDF/XML_ into same knowledge base that already contains the other SNOMED data
+      
+      After all imports are complete, enable the _read only_ checkbox - this enables an internal cache and improves performance.
     host-institution-name: SNOMED International
     website-url: https://www.snomed.org
     license-url: https://www.snomed.org/get-snomed