tableau-mkt/addressfield.json — pull request #13 by iamEAP (2014-09-22 21:04:52+00:00)
Title: Add regex format for US ZIP codes

This one's [pretty well-documented](http://en.wikipedia.org/wiki/ZIP_code). US ZIP codes consist of 5 digits. Optionally, 4 additional digits can be affixed to the 5 primary digits (separated by a hyphen). Believe checking that a zip code exists is beyond the scope of this configuration.

__Proposed pattern__
`^\d{5}(?:[-\s]\d{4})?$`

__Examples__
- 98103
- 90210-9998