[oslc-core] Issue 43-6: Core resource definitions allow >1 value type, but resource shapes permit only 1

[John Arwe]

Now that it's getting easier to track the unfinished parts of 43, this is 
one of the outstanding items.

Core resource definitions allow >1 value type [1] "A property MAY allow 
multiple value-types and a value MUST satisfy one or more of them.", but 
resource shapes permit only 1 value type [2] "oslc:valueType exactly-one". 
 For "resource" Property shapes, the Resource value-types enumeration 
covers all the cases I can think of.  For "literal" Property shapes, the 
Literal value-types enumeration lists 8 potential values, versus the 
single one allowed for an implementation on the Property's resource shape 
entry. 

I also don't see anything limiting a Property from allowing both literal 
and resource value types, although I have yet to see this capability used 
in practice.

Is there any reason Core limits an implementation to a single value-type 
when it permits specifications wider latitude?


[1] 
http://open-services.net/bin/view/Main/OslcCoreSpecification?sortcol=table;up=#OSLC_Defined_Resources
[2] 
http://open-services.net/bin/view/Main/OSLCCoreSpecAppendixA?sortcol=table;up=#oslc_ResourceShape_Resource

Best Regards, John

Voice US 845-435-9470  BluePages
Tivoli OSLC Lead - Show me the Scenario
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