Dear Eric!
I have a problem in understanding of subscribeObjectClassAttributes method. the standard 1516.2 said :
"for all object instances discovered as a result of this service invocation, shall be
provided to the joined federate from the RTI (via the Reflect Attribute Values service).
The set of class attributes provided shall be a subset of the available attributes of the specified object class."
and in the end its says.
"If the optional passive subscription indicator argument is not present or indicates that this is an active subscription, the invocation of this service may cause the Start Registration For Object Class service to be invoked at one or more other joined federates."