Validates context for activity.

[ryasmi]

Would cause problems for https://github.com/LearningLocker/xAPI-Recipe-Emitter/blob/master/docs/examples/AssignmentGraded.json

[ryasmi]

Any idea why this restriction is required @garemoko?

[garemoko]

@ryansmith94 there's no technical requirement disallowing statements from containing those properties with other objects and the LRS shouldn't reject them, but i can't think of a use case where those properties make sense where the object is an agent, statement reference or substatement.

Possibly if the object is an agent representing a robot or clone, then revision and even platform might make sense.

[garemoko]

Luke Skywalker reprogrammed R2D2, platform R2, revision D2.

[ryasmi]

@garemoko the spec states:

The revision property MUST only be used if the Statement's Object is an Activity.
The platform property MUST only be used if the Statement's Object is an Activity.

[garemoko]

@ryansmith94 ha. Good catch. No robot agents then.

[ryasmi]

Ok thanks @garemoko, I'll get this merged then.