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-ListCode-1",
  "url": "https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-ListCode-1",
  "version": "1.8.0",
  "name": "Care Connect List Code",
  "status": "draft",
  "date": "2020-09-29T17:18:00+00:00",
  "publisher": "HL7 UK",
  "description": "A ValueSet to identify the purpose of a list.",
  "copyright": "Copyright © 2020 HL7 UK",
  "compose": {
    "include": [
      {
        "system": "http://snomed.info/sct",
        "concept": [
          {
            "code": "887161000000102",
            "display": "Diagnoses"
          },
          {
            "code": "887171000000109",
            "display": "Procedures"
          },
          {
            "code": "717711000000103",
            "display": "Problems"
          },
          {
            "code": "933361000000108",
            "display": "Medications and medical devices"
          },
          {
            "code": "886921000000105",
            "display": "Allergies and adverse reactions"
          },
          {
            "code": "1102411000000102",
            "display": "Active medications"
          },
          {
            "code": "1102191000000100",
            "display": "Discontinued medications"
          },
          {
            "code": "1103671000000101",
            "display": "Ended allergies"
          },
          {
            "code": "325851000000107",
            "display": "Consultation"
          },
          {
            "code": "25851000000105",
            "display": "Topic (EHR)"
          },
          {
            "code": "24781000000107",
            "display": "Category (EHR)"
          },
          {
            "code": "1102181000000102",
            "display": "Immunisations"
          },
          {
            "code": "826501000000100",
            "display": "Miscellaneous record"
          },
          {
            "code": "792931000000107",
            "display": "Outbound referral"
          },
          {
            "code": "887191000000108",
            "display": "Investigations and results"
          },
          {
            "code": "1149501000000101",
            "display": "List of consultations"
          },
          {
            "code": "225390008",
            "display": "Triage"
          },
          {
            "code": "714311000000108",
            "display": "Patient recall administration"
          }
        ]
      },
      {
        "system": "https://fhir.hl7.org.uk/STU3/CodeSystem/GPConnect-SecondaryListValues-1"
      }
    ]
  }
}