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+== CRS84 update to include EllipsoidalCS element
+
+The proposed revision of CRS84 is shown below.
+
+Date: 2022-09-28
+
+[source,xml]
+----
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<GeodeticCRS xmlns="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:0.11:dataset" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/gml/3.2 http://schemas.opengis.net/gml/3.2.1/gml.xsd      http://www.w3.org/1999/xlink http://schemas.opengis.net/xlink/1.0.0/xlinks.xsd     urn:x-ogp:spec:schema-xsd:EPSG:0.11:dataset ../../../EPSG.xsd" gml:id="ogc-crs-OGC-CRS84" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd">
+    <metaDataProperty>
+        <epsg:CommonMetaData>
+            <epsg:type>geographic 2D</epsg:type>
+            <epsg:informationSource>B.3 in OGC 06-042.</epsg:informationSource>
+            <epsg:revisionDate>2004-01-20</epsg:revisionDate>
+            <epsg:show>true</epsg:show>
+            <epsg:isDeprecated>false</epsg:isDeprecated>
+        </epsg:CommonMetaData>
+    </metaDataProperty>
+    <metaDataProperty>
+        <epsg:CRSMetaData>
+            <epsg:projectionConversion xlink:href="http://www.opengis.net/def/coordinateOperation/EPSG/0/15593"/>
+            <epsg:sourceGeographicCRS xlink:href="http://www.opengis.net/def/crs/EPSG/0/4979"/>
+        </epsg:CRSMetaData>
+    </metaDataProperty>
+    <identifier codeSpace="http://www.opengis.net/">http://www.opengis.net/def/crs/OGC/1.3/CRS84</identifier>
+    <name codeSpace="http://urn.opengis.net/">http://www.opengis.net/def/crs/OGC/1.3/CRS84</name>
+    <name>WGS 84 longitude-latitude</name>
+    <domainOfValidity>
+        <epsg:AreaOfUse xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0">
+            <gmd:description>
+                <gco:CharacterString>World.</gco:CharacterString>
+            </gmd:description>
+            <gmd:geographicElement>
+                <gmd:EX_GeographicBoundingBox>
+                    <gmd:westBoundLongitude>
+                        <gco:Decimal>-180</gco:Decimal>
+                    </gmd:westBoundLongitude>
+                    <gmd:eastBoundLongitude>
+                        <gco:Decimal>180</gco:Decimal>
+                    </gmd:eastBoundLongitude>
+                    <gmd:southBoundLatitude>
+                        <gco:Decimal>-90</gco:Decimal>
+                    </gmd:southBoundLatitude>
+                    <gmd:northBoundLatitude>
+                        <gco:Decimal>90</gco:Decimal>
+                    </gmd:northBoundLatitude>
+                </gmd:EX_GeographicBoundingBox>
+            </gmd:geographicElement>
+            <gml:metaDataProperty>
+                <epsg:CommonMetaData>
+                    <epsg:informationSource>OGP</epsg:informationSource>
+                    <epsg:revisionDate>2001-06-05</epsg:revisionDate>
+                    <epsg:show>false</epsg:show>
+                    <epsg:isDeprecated>false</epsg:isDeprecated>
+                </epsg:CommonMetaData>
+            </gml:metaDataProperty>
+            <gml:identifier codeSpace="OGP">http://www.opengis.net/def/area/EPSG/0/1262</gml:identifier>
+            <gml:name>World</gml:name>
+            <epsg:geometryFile xlink:href="http://www.opengis.net/def/extent-polygon/EPSG/0/1262" xlink:type="simple"/>
+        </epsg:AreaOfUse>
+    </domainOfValidity>
+    <scope>Horizontal component of 3D system. .</scope>
+    <gml:ellipsoidalCS>
+        <gml:EllipsoidalCS gml:id="epsg-cs-6424">
+            <gml:metaDataProperty>
+                <epsg:CommonMetaData>
+                    <epsg:type>ellipsoidal</epsg:type>
+                    <epsg:informationSource>OGP</epsg:informationSource>
+                    <epsg:revisionDate>2015-05-22</epsg:revisionDate>
+                    <epsg:changes>
+                        <epsg:changeID xlink:href="http://www.opengis.net/def/change-request/EPSG/0/2008.045"/>
+                        <epsg:changeID xlink:href="http://www.opengis.net/def/change-request/EPSG/0/2015.018"/>
+                    </epsg:changes>
+                    <epsg:isDeprecated>false</epsg:isDeprecated>
+                </epsg:CommonMetaData>
+            </gml:metaDataProperty>
+            <gml:identifier codeSpace="IOGP">http://www.opengis.net/def/cs/EPSG/0/6424</gml:identifier>
+            <gml:name>
+                Ellipsoidal 2D CS. Axes: longitude, latitude. Orientations: east, north. UoM: degree
+            </gml:name>
+            <gml:remarks>
+                Used in geog2D CRSs for some web mapping: CS code 6422 recommended. Coordinates referenced to this CS are in degrees. Any degree representation (e.g. DMSH, decimal, etc.) may be used but that used must be declared for the user by the supplier of data.
+            </gml:remarks>
+            <gml:axis>
+                <gml:CoordinateSystemAxis gml:id="iogp-axis-220" uom="http://www.opengis.net/def/uom/EPSG/0/9122">
+                    <gml:descriptionReference xlink:href="http://www.opengis.net/def/axis-name/EPSG/0/9902"/>
+                    <gml:identifier codeSpace="EPSG">http://www.opengis.net/def/axis/EPSG/0/220</gml:identifier>
+                    <gml:axisAbbrev>Lon</gml:axisAbbrev>
+                    <gml:axisDirection codeSpace="EPSG">east</gml:axisDirection>
+                </gml:CoordinateSystemAxis>
+            </gml:axis>
+            <gml:axis>
+                <gml:CoordinateSystemAxis gml:id="iogp-axis-221" uom="http://www.opengis.net/def/uom/EPSG/0/9122">
+                    <gml:descriptionReference xlink:href="http://www.opengis.net/def/axis-name/EPSG/0/9901"/>
+                    <gml:identifier codeSpace="EPSG">http://www.opengis.net/def/axis/EPSG/0/221</gml:identifier>
+                    <gml:axisAbbrev>Lat</gml:axisAbbrev>
+                    <gml:axisDirection codeSpace="EPSG">north</gml:axisDirection>
+                </gml:CoordinateSystemAxis>
+            </gml:axis>
+        </gml:EllipsoidalCS>
+    </gml:ellipsoidalCS>
+    <geodeticDatum>
+        <gml:GeodeticDatum xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" gml:id="iogp-datum-6326">
+            <gml:metaDataProperty>
+                <epsg:CommonMetaData>
+                    <epsg:type>geodetic</epsg:type>
+                    <epsg:alias code="332" codeSpace="http://www.opengis.net/def/naming-system/EPSG/0/7302" alias="WGS 84"/>
+                    <epsg:informationSource>NIMA TR8350.2 June 2004 revision. http://earth-info.nga.mil/GandG/publications/tr8350.2/tr8350_2.html and
+                        http://gis-lab.info/docs/nima-tr8350.2-addendum.pdf. Also NGA.STND.0036_1.0.0_WGS84 of 2014-07-08.</epsg:informationSource>
+                    <epsg:revisionDate>2017-07-14</epsg:revisionDate>
+                    <epsg:show>true</epsg:show>
+                    <epsg:isDeprecated>false</epsg:isDeprecated>
+                </epsg:CommonMetaData>
+            </gml:metaDataProperty>
+            <gml:identifier codeSpace="IOGP">http://www.opengis.net/def/datum/EPSG/0/6326</gml:identifier>
+            <gml:name>World Geodetic System 1984</gml:name>
+            <gml:remarks>EPSG::6326 has been the then current realization. No distinction is made between the original and subsequent (G730, G873, G1150, G1674 and G1762) WGS 84 frames. Since 1997, WGS 84 has been maintained within 10cm of the then current ITRF.</gml:remarks>
+            <gml:domainOfValidity>
+                <epsg:AreaOfUse>
+                    <gmd:description>
+                        <gco:CharacterString>World.</gco:CharacterString>
+                    </gmd:description>
+                    <gmd:geographicElement>
+                        <gmd:EX_GeographicBoundingBox>
+                            <gmd:westBoundLongitude>
+                                <gco:Decimal>-180</gco:Decimal>
+                            </gmd:westBoundLongitude>
+                            <gmd:eastBoundLongitude>
+                                <gco:Decimal>180</gco:Decimal>
+                            </gmd:eastBoundLongitude>
+                            <gmd:southBoundLatitude>
+                                <gco:Decimal>-90</gco:Decimal>
+                            </gmd:southBoundLatitude>
+                            <gmd:northBoundLatitude>
+                                <gco:Decimal>90</gco:Decimal>
+                            </gmd:northBoundLatitude>
+                        </gmd:EX_GeographicBoundingBox>
+                    </gmd:geographicElement>
+                    <gml:metaDataProperty>
+                        <epsg:CommonMetaData>
+                            <epsg:informationSource>OGP</epsg:informationSource>
+                            <epsg:revisionDate>2001-06-05</epsg:revisionDate>
+                            <epsg:show>false</epsg:show>
+                            <epsg:isDeprecated>false</epsg:isDeprecated>
+                        </epsg:CommonMetaData>
+                    </gml:metaDataProperty>
+                    <gml:identifier codeSpace="OGP">http://www.opengis.net/def/area/EPSG/0/1262</gml:identifier>
+                    <gml:name>World</gml:name>
+                    <epsg:geometryFile xlink:href="http://www.opengis.net/def/extent-polygon/EPSG/0/1262" xlink:type="simple"/>
+                </epsg:AreaOfUse>
+            </gml:domainOfValidity>
+            <gml:scope>Satellite navigation.</gml:scope>
+            <gml:anchorDefinition>Defined through a consistent set of station coordinates. These have changed with time: by 0.7m on 1994-06-29 (G730), a further 0.2m on 1997-01-29 (G873),  0.06m on 2002-01-20 (G1150), 0.2m on 2012-02-08 (G1674) and 0.02m on 2013-10-16 (G1762).</gml:anchorDefinition>
+            <gml:primeMeridian>
+                <gml:PrimeMeridian gml:id="iogp-meridian-8901">
+                    <gml:metaDataProperty>
+                        <epsg:CommonMetaData>
+                            <epsg:informationSource>OGP</epsg:informationSource>
+                            <epsg:revisionDate>2016-12-15</epsg:revisionDate>
+                            <epsg:show>true</epsg:show>
+                            <epsg:isDeprecated>false</epsg:isDeprecated>
+                        </epsg:CommonMetaData>
+                    </gml:metaDataProperty>
+                    <gml:identifier codeSpace="IOGP">http://www.opengis.net/def/meridian/EPSG/0/8901</gml:identifier>
+                    <gml:name>Greenwich</gml:name>
+                    <gml:remarks>The international reference meridian as defined first by the 1884 International Meridian Conference and later by the Bureau International de l'Heure (BIH) and then the International Earth Rotation Service (IERS).</gml:remarks>
+                    <gml:greenwichLongitude uom="http://www.opengis.net/def/uom/EPSG/0/9102">0</gml:greenwichLongitude>
+                </gml:PrimeMeridian>
+            </gml:primeMeridian>
+            <gml:ellipsoid>
+                <gml:Ellipsoid gml:id="iogp-ellipsoid-7030">
+                    <gml:metaDataProperty>
+                        <epsg:CommonMetaData>
+                            <epsg:alias code="67" codeSpace="http://www.opengis.net/def/naming-system/EPSG/0/7301" alias="WGS84"/>
+                            <epsg:informationSource>DMA Technical Manual 8350.2-B</epsg:informationSource>
+                            <epsg:revisionDate>2015-11-25</epsg:revisionDate>
+                            <epsg:show>true</epsg:show>
+                            <epsg:isDeprecated>false</epsg:isDeprecated>
+                        </epsg:CommonMetaData>
+                    </gml:metaDataProperty>
+                    <gml:identifier codeSpace="IOGP">http://www.opengis.net/def/ellipsoid/EPSG/0/7030</gml:identifier>
+                    <gml:name>WGS 84</gml:name>
+                    <gml:remarks>1/f derived from four defining parameters semi-major axis; C20 = -484.16685*10e-6; earth's angular velocity ? = 7292115e-11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s. In 1994 new GM = 3986004.418e8 m*m*m/s/s but a and 1/f retained.</gml:remarks>
+                    <gml:semiMajorAxis uom="http://www.opengis.net/def/uom/EPSG/0/9001">6378137</gml:semiMajorAxis>
+                    <gml:secondDefiningParameter>
+                        <gml:SecondDefiningParameter>
+                            <gml:inverseFlattening uom="http://www.opengis.net/def/uom/EPSG/0/9201">298.257223563</gml:inverseFlattening>
+                        </gml:SecondDefiningParameter>
+                    </gml:secondDefiningParameter>
+                </gml:Ellipsoid>
+            </gml:ellipsoid>
+        </gml:GeodeticDatum>
+    </geodeticDatum>
+</GeodeticCRS>
+----