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Identifier Policy

The PPR project uses URIs whenever Object Identifiers are required. URIs (Uniform Resource Identifiers) are globally unique identifiers for individual objects, as well as for value sets, code systems, profiles, namespaces, and more. URIs are the preferred object identifiers for FHIR objects, and are usually represented as URLs. All URIs used in Ontario Health projects must conform to Ontario Health's URI Management Policy.

For more information, or to obtain the proper URLs for use in this project, contact the Ontario Health Registries Team at oh-ds_registries@ontariohealth.ca.

The base URL for PPR FHIR interface will be referred to as "[base]" in the sections and examples below. These identifiers capture the URI specific to an implementation/environment, such as the URL for resources and extensions used in the PPR solution.

The base URL for Naming System (namespace of identifiers and code system of local terminologies) is 'http://ehealthontario.ca/API/FHIR/NamingSystem'.

For global/shareable identifiers (e.g. Ontario Physician License, etc.), this might be replaced with 'http://hl7.org/fhir/NamingSystem/ca-on-license-physician' in the future when HL7 FHIR Naming System registry is available.

The base for global identifier namespaces will be referred to as "[id-system-global-base]" in the sections and examples below. The base for local identifier namespaces (e.g. Practitioner identifiers, etc.) will be referred to as "[id-system-local-base]" in the sections and examples below. The base for local code systems (e.g. Practitioner Specialty) will be referred to as "[code-system-local-base]" in the sections and examples below. Due to the evolving FHIR standard and its developing framework and governance, implementers should recognize that these identifiers may change if identifier registration becomes governed nationally or internationally. Implementers are recommended to implement URIs using configurable variables.

Table 3 - Identifier Variables