National Institute of Standards and Technology, Interfaces for Personal Identity Verification (NIST Special Publication 800-73-4): * Part 1: End-Point PIV Card Application Namespace, Data Model and Representation (May 13, 2013) (full-text) * Part 2- PIV Card Application Card Command Interface (May 13, 2013) (full-text) * Part 3- PIV Client Application Programming Interface (May 13, 2013) (full-text).