Split spec into two or more parts

Good morning,

Jim (who's supposed to be on vacation) and I have been having a
conversation in the comments on the requirement: 3.9 Consider dividing
the specification.

  https://github.com/xproc/specification/issues/53

Jim appears to recall that we decided we wanted to do this, I recall
that we're still waffling about it.

Straw proposal, three REC track documents:

  XProc 2.0: An XML Pipeline Language
  XProc 2.0: Required Step Vocabulary
  XProc 2.0: Optional Step Vocabulary

Objections?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh
Lead Engineer
MarkLogic Corporation
Phone: +1 512 761 6676
www.marklogic.com