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