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Copyright © 2014 Open Geospatial Consortium
13 Conclusions and Recommendations
13.1.1 Managing potential failovers
Improvements are desirable to the aspect of managing potential failover when using GeoSPARQL endpoints. Whilst this offers extended semantic mediation capabilities, it
leads to additional questions of whether an additional component will be required in future testbeds for managing the failover.
Perhaps a registry or WPS could keep track of all of the ontologies to ensure that they are all online; possibly sending out an alert when an ontology becomes unavailable.
13.1.2 WFS-G: PropertyMatches operator
The successful use of the PropertyMatches operator confirmed its utility and potential role in future WFS-G usage. It is therefore recommended that this operator be included in
future revisions on OGC standards cf. 8.2.4.
13.1.3 WFS-G: Radial Search support
WFS-G shall by default support radial search through DWithin operators cf. 8.5.1
13.1.4 WFS-G: Use of Parent Property for locations
The parent property is not appropriate for locations due to its implication of inheritence within Object Oriented modeling. Another reason is that the parent property implies a
parent-child relationship whereas its role attribute may imply different relationships such as in_country, potentially contradicting the parent relationship. This could lead to
incorrect intepretation of values due to ambiguity of the parent property or its role attribute.
The resulting change request suggests to replace the parent property with a relation property with tagged value for role.´
13.1.5 WFS-G: Ambiguous top level container
The WFS-G BP specifies that the top level container should be an iso19112:SI_Collection element but then gives an example that uses a
wfs:FeatureCollection element.This will lead to exceptions if clients do not know what top-level container root element to expect.
The resulting change request suggests to constrain the WFS-G Response to providing wfs:FeatureCollection as the top-level container.
Copyright © 2014 Open Geospatial Consortium
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13.1.6 WFS-G: Update WFS-G Best Practices for WFS 2.0
