Applying data markings

All,

  I developed this proposal to handle the application of data markings in STIX 2.0:  https://github.com/johnwunder/data-markings . Note: it doesn't address the format of the markings
  themselves (improvements to TLP, the work in FIRST, etc), just how those markings get applied to content.

  I this this meets the need for simplicity for object-level markings as we’ve talked about many times while still allowing for more complicated field-level markings for those that need them. Please review the proposal and let’s talk about feedback.
  If this looks good to everyone we could use it as the solution for issue #231 (currently #2 on our roadmap).

  John