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.
<ValueSet xmlns="http://hl7.org/fhir">
   <id value="CareConnect-DischargeDestination-1"></id>
   <text>
      <status value="generated"></status>
   </text>
   <extension url="http://hl7.org/fhir/StructureDefinition/valueset-sourceReference">
      <valueUri value="http://www.datadictionary.nhs.uk/data_dictionary/attributes/d/disc/discharge_destination_de.asp?shownav=1"></valueUri>
   </extension>
   <url value="https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-DischargeDestination-1"></url>
   <version value="1.1.0"></version>
   <name value="NHS Data Model and Dictionary Discharge Destination"></name>
   <status value="draft"></status>
   <date value="2018-11-14T00:00:00+00:00"></date>
   <publisher value="HL7 UK"></publisher>
   <description value="The destination of a Patient on completion of a Hospital Provider Spell, or a note that the Patient died or was a still birth."></description>
   <copyright value="Copyright © 2016 HL7 UK"></copyright>
   <compose>
      <include>
         <system value="https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-DischargeDestination-1"></system>
      </include>
   </compose>
</ValueSet>