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": "ConceptMap",
  "id": "CareConnect-PersonNameType-1",
  "url": "https://fhir.hl7.org.uk/STU3/ConceptMap/CareConnect-PersonNameType-1",
  "version": "1.1.0",
  "name": "Concept Map - Care Connect Person Name Type",
  "status": "draft",
  "date": "2018-11-02T00:00:00+00:00",
  "publisher": "HL7 UK",
  "description": "A Concept Map from ValueSet Name Use to PDS Person Name Type to aid interpretation.",
  "copyright": "Copyright © 2016 HL7 UK",
  "sourceReference": {
    "reference": "https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-NameUse-1"
  },
  "targetReference": {
    "reference": "https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-PDS-PersonNameType-1"
  },
  "group": [
    {
      "source": "http://hl7.org/fhir/name-use",
      "target": "https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-PDS-PersonNameType-1",
      "element": [
        {
          "code": "official",
          "display": "Official",
          "target": [
            {
              "code": "L",
              "display": "Usual (current) name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "nickname",
          "display": "Nickname",
          "target": [
            {
              "code": "A",
              "display": "Alias name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "usual",
          "display": "Usual",
          "target": [
            {
              "code": "PREFERRED",
              "display": "Preferred name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "old",
          "display": "Old",
          "target": [
            {
              "code": "PREVIOUS",
              "display": "Other previous name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "old",
          "display": "Old",
          "target": [
            {
              "code": "PREVIOUS-BACHELOR",
              "display": "Bachelor name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "old",
          "display": "Old",
          "target": [
            {
              "code": "PREVIOUS-BIRTH",
              "display": "Birth name",
              "equivalence": "equivalent"
            }
          ]
        },
        {
          "code": "old",
          "display": "Old",
          "target": [
            {
              "code": "PREVIOUS-MAIDEN",
              "display": "Maiden name",
              "equivalence": "equivalent"
            }
          ]
        }
      ]
    }
  ]
}