# profiles and Operations

## Introduction
The resources section of this implementation guide describes the profiles for use in the specification, provides narrative about their use, and assigns them a "readiness score" as they develop.

The implementation guide is targeting to be aligned with FHIR4 when it is released. As such, updates will be made as the ballot releases leading up to FHIR4 progress. As of this writing, this guide is based on FHIR3.2, with FHIR3.3 available for review.

## eReferral Resources
In this project, a small subset of FHIR resources needed for the ereferral solution is implemented. For a complete list of FHIR resources visit https://www.hl7.org/fhir/resourcelist.html. 

Below is the list of resources related to this project and their corresponding maturity levels in the parentheses :

* DocumentReference (3)
* OperationOutcome (5)
* ReferralRequest (1)
* Organization (3)
* Location(3)
* HealthcareService(2)
* Task(2)
* Composition (2)
* Practitioner (3)
* Patient (5)
* Bundle (5)

This implementation guide includes customized FHIR profiles for each resource. To do so, we have introduced new extensions, value sets and changed the cardinality of data elements in the abovementioned resources.

## Profile Readiness Score Scale
As this eReferral specification is a work in progress, each of the profiles will be ranked based on their maturity as follows:

* 0% - Not started
* 20% - Preliminary Draft
* 40% - Advanced Draft
* 60% - Prototype Ready
* 80% - Ready for formal final review and acceptance/balloting
*100% - Ready for implementation