Definition: OGP XML
<div class="syntax"><pre><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span>
<span class="nt"><gml:Conversion</span> <span class="na">xmlns:epsg=</span><span class="s">"urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset"</span> <span class="na">xmlns:gml=</span><span class="s">"http://www.opengis.net/gml/3.2"</span> <span class="na">xmlns:xlink=</span><span class="s">"http://www.w3.org/1999/xlink"</span> <span class="na">gml:id=</span><span class="s">"iogp-op-8356"</span><span class="nt">></span>
<span class="nt"><gml:metaDataProperty></span>
<span class="nt"><epsg:CommonMetaData></span>
<span class="nt"><epsg:type></span>conversion<span class="nt"></epsg:type></span>
<span class="nt"><epsg:informationSource></span>IOGP<span class="nt"></epsg:informationSource></span>
<span class="nt"><epsg:revisionDate></span>2017-10-11<span class="nt"></epsg:revisionDate></span>
<span class="nt"><epsg:changes></span>
<span class="nt"><epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:change-request:EPSG::2014.027"</span> <span class="nt">/></span>
<span class="nt"></epsg:changes></span>
<span class="nt"><epsg:show></span>true<span class="nt"></epsg:show></span>
<span class="nt"><epsg:isDeprecated></span>false<span class="nt"></epsg:isDeprecated></span>
<span class="nt"></epsg:CommonMetaData></span>
<span class="nt"></gml:metaDataProperty></span>
<span class="nt"><gml:identifier</span> <span class="na">codeSpace=</span><span class="s">"IOGP"</span><span class="nt">></span>urn:ogc:def:coordinateOperation:EPSG::8356<span class="nt"></gml:identifier></span>
<span class="nt"><gml:name></span>Caspian height to Caspian depth<span class="nt"></gml:name></span>
<span class="nt"><gml:remarks></span>Change of axis positive direction from up to down.<span class="nt"></gml:remarks></span>
<span class="nt"><gml:domainOfValidity</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:area:EPSG::1291"</span> <span class="nt">/></span>
<span class="nt"><gml:scope></span>Change of axis positive direction to facilitate transformation of heights or depths through concatenated operations.<span class="nt"></gml:scope></span>
<span class="nt"><gml:method</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:method:EPSG::1068"</span> <span class="nt">/></span>
<span class="nt"></gml:Conversion></span>
</pre></div>
<?xml version="1.0" encoding="UTF-8"?>
<gml:Conversion xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="iogp-op-8356">
<gml:metaDataProperty>
<epsg:CommonMetaData>
<epsg:type>conversion</epsg:type>
<epsg:informationSource>IOGP</epsg:informationSource>
<epsg:revisionDate>2017-10-11</epsg:revisionDate>
<epsg:changes>
<epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2014.027" />
</epsg:changes>
<epsg:show>true</epsg:show>
<epsg:isDeprecated>false</epsg:isDeprecated>
</epsg:CommonMetaData>
</gml:metaDataProperty>
<gml:identifier codeSpace="IOGP">urn:ogc:def:coordinateOperation:EPSG::8356</gml:identifier>
<gml:name>Caspian height to Caspian depth</gml:name>
<gml:remarks>Change of axis positive direction from up to down.</gml:remarks>
<gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1291" />
<gml:scope>Change of axis positive direction to facilitate transformation of heights or depths through concatenated operations.</gml:scope>
<gml:method xlink:href="urn:ogc:def:method:EPSG::1068" />
</gml:Conversion>