Now that we have a SNOMED CT Code System, let's take a look at its content. We can query its content using either the SNOMED CT API or the FHIR API.

For sake of simplicity, let's search for the available concepts using the SNOMED CT API. For that we will need the branch we would like to query, but fortunately we already know the value from our previous call to the Code Systems API, it was MAIN. To list all available concepts in a SNOMED CT Code System, use the following command:

curl http://localhost:8080/snowowl/snomed-ct/v3/MAIN/concepts

And the response is:

  "items": [],
  "limit": 50,
  "total": 0

Which simply means we have no SNOMED CT concepts yet in our instance.

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