Open Geospatial Consortium
OGC Doc 08-196r1
CR-Form-v3
CHANGE REQUEST
WCS 1.1.2 CR
08-196
revR1
Current version: 1.1.2 For
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Proposed change affects: AS Imp Spec X Best Practices Paper Other
Title: WCS 1.1.2 Change Request - Refactor XML Schemas
Source: PCI Geomatics
Work item code: Date:
Category: D
Use one of the following categories:
F (Critical correction)
A (corresponds to a correction in an earlier release)
B (Addition of feature),
C (Functional modification of feature)
D (Editorial modification)
Detailed explanations of the above categories can be found in the TC Policies and Procedures.
Reason for change: To separate the XML Schemas for requests from the response XML Schemas
Summary of change: The XML encodings for WCS requests and responses are defined in the same file usually named after the request. It is better to split the request schemas and the response schemas into separate files.
The coverage description response has also been refactored into
wcsDescribeCoverageResponse.xsd and wcsCoverage.xsd – this is a step closer to making the WCS Coverage more independent of the WCS service so that it can be reused outside of the WCS service.
Consequences if
not approved: There are several request encodings (KVP, XML) but usually only one XML response encoding so it makes sense to not integrate them both into the same XML Schema document. Organizations implementing only the KVP request encoding doesn’t care about the XML request schemas. There is also a slight confusion when referring to the request or response XML Schemas because the current method bases the XSD file name on the request name.
The coverage description refactoring will make it easier for the SWE group to reuse coverages thus possibly making it easier to harmonize.
Clauses affected:
Other specs Other core specifications
Affected: Abstract specifications Recommendation Papers
The OGC Technical Committee Policies & Procedures 05-020r3
Other comments: The change request is included in a ZIP file containing both this document and the XML Schemas split between the requests and responses. Any changes to the actual WCS specification due to this change request are not yet resolved by this change request.
The XML schemas in this change request are fully backwards compatible with the WCS 1.1.2 XML Schemas.
Another refactoring that could be done is to move the list of interpolation methods out of the Field thus making the CoverageType more of a list of metadata on a Coverage rather than listing what can be requested.
Status
Disposition
