CSW DC output should display valid CRS URN

[tomkralidis]

CSW DC output has the following snippet for spatial representation:

    <ows:BoundingBox crs="urn:ogc:def:crs:::WGS 1984">
      <ows:LowerCorner>-52.03125 21.796875</ows:LowerCorner>
      <ows:UpperCorner>-106.875 54.140625</ows:UpperCorner>
    </ows:BoundingBox>

Is urn:ogc:def:crs:::WGS 1984 a valid CRS? Since GN controls this output, it would be valuable to output a known and valid CRS (whether it's a EPSG code, URN, etc.), which honours axis order.

Examples:

    <ows:BoundingBox crs="urn:ogc:def:crs:EPSG:6.11:4326">
      <ows:LowerCorner>miny minx</ows:LowerCorner>
      <ows:UpperCorner>maxy maxx</ows:UpperCorner>
    </ows:BoundingBox>

    <ows:BoundingBox crs="EPSG:4326">
      <ows:LowerCorner>minx miny</ows:LowerCorner>
      <ows:UpperCorner>maxx maxy</ows:UpperCorner>
    </ows:BoundingBox>

[tomkralidis]

Update: the WGS 1984 comes from the ISO document which was inserted into the GN catalog via CSW Transaction (Insert). I updated the ISO document with the following snippet:

         <gmd:RS_Identifier>
           <gmd:code>
             <gco:CharacterString>4326</gco:CharacterString>
           </gmd:code>
           <gmd:codeSpace>
             <gco:CharacterString>EPSG</gco:CharacterString>
           </gmd:codeSpace>
         </gmd:RS_Identifier>

at which point the CRS is outputted correctly:

    <ows:BoundingBox crs="urn:ogc:def:crs:EPSG::4326">
      <ows:LowerCorner>-52.03125 21.796875</ows:LowerCorner>
      <ows:UpperCorner>-106.875 54.140625</ows:UpperCorner>
    </ows:BoundingBox>

However a./ the axis order is off and b./ the x coordinates are swapped (related ticket #730).

[tomkralidis]

FYI the metadata above was generated from the GN UI, which allows 'WGS 1984' as a projection when specifying the bounding coordinates of the metadata, so I'm guessing this should be updated in the UI area.