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"?><CodeSystem xmlns="http://hl7.org/fhir">
   <id value="CareConnect-PDS-PersonNameType-1"/>
   <url value="https://fhir.hl7.org.uk/STU3/CodeSystem/CareConnect-PDS-PersonNameType-1"/>
   <version value="1.1.0"/>
   <name value="PDS Person Name Type"/>
   <status value="draft"/>
   <date value="2018-11-02T00:00:00+00:00"/>
   <publisher value="HL7 UK"/>
   <description value="A code to identify the type of a name of a Person."/>
   <copyright value="Copyright © 2016 HL7 UK"/>
   <caseSensitive value="true"/>
   <content value="complete"/>
   <concept>
      <code value="L"/>
      <display value="Usual (current) name"/>
   </concept>
   <concept>
      <code value="A"/>
      <display value="Alias name"/>
   </concept>
   <concept>
      <code value="PREFERRED"/>
      <display value="Preferred name"/>
   </concept>
   <concept>
      <code value="PREVIOUS"/>
      <display value="Other previous name"/>
   </concept>
   <concept>
      <code value="PREVIOUS-BACHELOR"/>
      <display value="Bachelor name"/>
   </concept>
   <concept>
      <code value="PREVIOUS-BIRTH"/>
      <display value="Birth name"/>
   </concept>
   <concept>
      <code value="PREVIOUS-MAIDEN"/>
      <display value="Maiden name"/>
   </concept>
</CodeSystem>