What are the differences in specs?

[hansmbakker]

For me the differences in specs are still new and not very clear. I understood that iotivity-node is based on the OCF web spec, but it is not clear to me who defines it and how it relates to the (official) OCF specs.

For example I found the OCF Smart Home spec where is stated on page 11-12 that ResourceLinks should have a rel property indicating the link between Resources. However I don't see that in the OCF web spec.

Is that rel property an addition for SmartHome devices or should it always be there?