dataprotocols/dataprotocols — pull request #112 by ldodds (2014-04-06 12:00:10+00:00)
Title: Added description of constraints

Initial changes in support of #95.

This currently covers addition of `constraints`. Still to do:

* [ ] revising `type` to use XML Schema URIs. This would be a breaking change
* [ ] addition of `datePattern` to support more flexible parsing and validation of dates.