expand parameter should be aplicable to ParameterizedCRS

[Dimitar Misev]

The expand parameter in SECORE should control whether to resolve a parameterized CRS url. With value none the original CRS definition is returned.

expand=none

[Piero Campalani]

NOTE: It should replace the flatten parameter.

[abeccati]

Milestone 9.0-beta1 deleted

[Bang Pham Huu]

May I ask a question, I guess that parameterizedCRS mean user can add "parameters" to URL with key=value, and Dimitar wants when access URL with ?expand=none, it will return the original definition like with /browse.jsp.

http://kahlua.eecs.jacobs-university.de:8080/def/crs/OGC/0/Index1D/browse.jsp

<ParameterizedCRS xmlns="http://www.opengis.net/CRS-NTS/1.0" 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" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" gml:id="param-index1d-crs">
  <gml:description>Parametrized 1D CRS with indexed coordinates.</gml:description>
  <gml:identifier codeSpace="http://www.ietf.org/rfc/rfc3986">http://www.opengis.net/def/crs/OGC/0/Index1D</gml:identifier>
  <gml:name>Parametrized Index 1D CRS</gml:name>
  <gml:remarks>Initial version (0.1)</gml:remarks>
  <parameters>
    <parameter name="axis-label">
      <value>"i"</value>
      <target>//gml:CoordinateSystemAxis/gml:axisAbbrev</target>
    </parameter>
  </parameters>
  <targetCRS xlink:href="http://www.opengis.net/def/crs/OGC/0/_Index1D_template"/>
</ParameterizedCRS>

However, I feel expand=none is "confusing" because with expand=0 that means no resolve to any xlink:href. For example a paramerterizedCRS like above when resolve with expand=0 will return only the imported CRS inside it (which is ImageCRS "index1d-crs"))

http://kahlua.eecs.jacobs-university.de:8080/def/crs/OGC/0/Index1D?expand=0

<ImageCRS id="index1d-crs"><description>CRS for 1D index-domain referenced axis.</description><identifier codeSpace="http://www.ietf.org/rfc/rfc3986">http://kahlua.eecs.jacobs-university.de:8080/def/crs/OGC/0/Index1D?expand=0</identifier><name>1D Index CRS</name><remarks>Initial version (0.1)</remarks><scope>not known</scope><cartesianCS><CartesianCS xlink:href="http://www.opengis.net/def/cs/OGC/0/CartesianIndexed1D"/></cartesianCS><imageDatum><ImageDatum xlink:href="http://www.opengis.net/def/datum/OGC/0/CellCenter"/></imageDatum></ImageCRS>

So I think, a parameter to return the original definition of CRS in XML (same as in browse.jsp) like "?getDef" is better.

[Dimitar Misev]

Let's ignore this one, because we need to decide the parameter first and this needs to be in line with OGC.

[Bang Pham Huu]

yes, it is good to know. Thanks.