This is a HL7 FHIR server, and as you appear to be accessing this page from a web browser you are seeing a HTML version of the requested resource(s). You can also access this URL from a FHIR client as a ReSTful API call. For more details please see the HL7 FHIR specification.
{
  "resourceType": "ValueSet",
  "id": "CareConnect-DischargeDestination-1",
  "text": {
    "status": "generated"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/valueset-sourceReference",
      "valueUri": "http://www.datadictionary.nhs.uk/data_dictionary/attributes/d/disc/discharge_destination_de.asp?shownav=1"
    }
  ],
  "url": "https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-DischargeDestination-1",
  "version": "1.1.0",
  "name": "NHS Data Model and Dictionary Discharge Destination",
  "status": "draft",
  "date": "2018-11-14T00:00:00+00:00",
  "publisher": "HL7 UK",
  "description": "The destination of a Patient on completion of a Hospital Provider Spell, or a note that the Patient died or was a still birth.",
  "copyright": "Copyright © 2016 HL7 UK",
  "compose": {
    "include": [
      {
        "system": "https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-DischargeDestination-1"
      }
    ]
  }
}