Multiple runtime constraints for one object property.

[jonathan-r-thorpe]

Within the current specification an object has an array of runtime constraint objects that have an NcPropertyId to identify the targeted property. Currently there is no language to restrict the number of runtime constraints for a given NcPropertyId.

For instance, it is possible to specify the following runtime constraints for a single property (id=2p10):

[NcPropertyConstraint< NcPropertyId=(level=2, index=10), defaultValue=10 >
 NcPropertyConstraint< NcPropertyId=(level=2, index=10), defaultValue=20 >
 NcPropertyConstraint< NcPropertyId=(level=2, index=10), defaultValue=30 >]

Although this would seem nonsensical, it is currently allowed according to the specification.

Therefore, this needs to clarified in the spec i.e. for a given property of an object, there MUST only be a maximum of one corresponding runtime constraint.