Discussion Groups and Wikis
IHE HPD Implementers
open discussion group on Google Groups
SITE's
Provider Directory Community Forum
Wiki page for IHE's developing
Healthcare Provider Directory USA National Extension
Wiki page the developing
FHIR Provider Directory/Registry Implementation Guide
Shared Implementations
PDTI - Provider Directory Test Implementation
on GitHub, a Java implementation of an HPD server and client used by the SITE Provider Directory Test Tool
Public Testing Tools
Standards Implementation & Testing Environment (SITE) Provider Directory Test Tool
, a test harness for HPD servers and clients