issue-145 ssn time

Raul notes in https://lists.w3.org/Archives/Public/public-sdw-wg/2016Dec/0181.html





* ssn:startTime and ssn:endTime

>> They are not documented in the ontology with rdfs:comment (it happens in others such as observedBy). And the link that appears in the description is "broken" (http://www.w3.org/2005/Incubator/ssn/wiki/SSN_Base#Time).

>> They are not used in any of the other entities in the ontology; should we remove them?

I agree --- either that or align with QB4ST and/or owlTime.   I prefer removing as I cannot find anybody using them and (can someone else confirm please)?, not even in the ssn examples. If I recall  they are intended to be used as part of the deployment  (the period in which a sensor  was in some deployment)., but I suppose they can be used for other things to - just generally useful subclasses of dul:Region.

I will populate the comment field but await a decision on removal or whatever.

Btw - they should be "deprecated' in preference to deletion.

Raised issue-145 https://www.w3.org/2015/spatial/track/issues/145

-Kerry