<?xml version="1.0" encoding="UTF-8"?>
<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron">
  <sch:ns prefix="mrs" uri="https://schemas.isotc211.org/19115/-1/mrs/1.3"/>
  <!--
    ISO 19115-3 base requirements for metadata instance documents
    
    See ISO19115-1:2014(E) page 17, Figure 12 Reference system information classes
  -->

  <!-- 
    Rule: MD_ReferenceSystem
    Ref: responsibilities
          Refer to ISO 19111 and ISO19111-2 when coordinate reference
          systeminformation is not given through referenceSystem Identifier
    -->
</sch:schema>