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.
<?xml version="1.0" encoding="UTF-8" standalone="no"?><ValueSet xmlns="http://hl7.org/fhir">
   <id value="CareConnect-ReportCodeSnCT-1"/>
   <url value="https://fhir.hl7.org.uk/STU3/ValueSet/CareConnect-ReportCodeSnCT-1"/>
   <version value="1.1.0"/>
   <name value="Care Connect Report Code SnCT"/>
   <status value="draft"/>
   <date value="2019-06-14T00:00:00+00:00"/>
   <publisher value="HL7 UK"/>
   <description value="A code from the SNOMED Clinical Terminology UK coding system that describes a diagnotic report"/>
   <copyright value="This value set includes content from SNOMED CT, which is copyright © 2002+ International Health Terminology Standards Development Organisation (IHTSDO), and distributed by agreement between IHTSDO and HL7. Implementer use of SNOMED CT is not covered by this agreement."/>
   <compose>
      <include>
         <system value="http://snomed.info/sct"/>
         <filter>
            <property value="constraint"/>
            <op value="="/>
            <value value="(<<371525003 | Clinical procedure report (record artifact))"/>
         </filter>
      </include>
   </compose>
</ValueSet>