Major Description
Lots of example schemas are written using discriminators, because they predated the choiceDispatchKey feature.
These schemas should be revised to use choiceDispatchKey, which is a tighter more declarative specification of a format, and also more efficient.
See issue: https://github.com/DFDLSchemas/PCAP/issues/4(DONE!) also, which is about rewriting discriminators for PCAP specifically