A curated namespace that issues unique symbols within that namespace for the identification of concepts, people, devices, etc. Represents a "System" used within the Identifier and Coding data types.

A natural language name identifying the naming system. This name should be usable as an identifier for the module by machine processing applications such as code generation.

Support human navigation & code generation.

The name is not expected to be globally unique. The name should be a simple alpha-numeric type name to ensure it is computable friendly. The"symbolic name" for an OID would be captured as an extension.

The status of this naming system. Enables tracking the life-cycle of the content.

Allows filtering of naming system that are appropriate for use vs. not.

Indicates the purpose for the naming system - what kinds of things does it make unique?

The date (and optionally time) when the naming system was published. The date must change when the business version changes, if it does, and it must change if the status code changes. In addition, it should change when the substantive content of the naming system changes.

Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the naming system. Additional specific dates may be added as extensions.

The name of the individual or organization that published the naming system.

Helps establish the "authority/credibility" of the naming system. May also allow for contact.

Usually an organization, but may be an individual. The publisher (or steward) of the naming system is the organization or individual primarily responsible for the maintenance and upkeep of the naming system. This is not necessarily the same individual or organization that developed and initially authored the content. The publisher is the primary point of contact for questions or issues with the naming system. This item SHOULD be populated unless the information is available from context.

Contact details to assist a user in finding and communicating with the publisher.

May be a web site, an email address, a telephone number, etc.

The name of the organization that is responsible for issuing identifiers or codes for this namespace and ensuring their non-collision.

This is the primary organization. Responsibility for some aspects of a namespace may be delegated.

Categorizes a naming system for easier search by grouping related naming systems.

This will most commonly be used for identifier namespaces, but categories could potentially be useful for code systems and authorities as well.

A free text natural language description of the naming system from the consumer's perspective. Details about what the namespace identifies including scope, granularity, version labeling, etc.

This description can be used to capture details such as why the naming system was built, comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the module as conveyed in the text field of the resource itself. This item SHOULD be populated unless the information is available from context.

The content was developed with a focus and intent of supporting the contexts that are listed. These terms may be used to assist with indexing and searching of code system definitions.

Assist in searching for appropriate content.

When multiple usageContexts are specified, there is no expectation for whether all or any of the contexts apply.

A jurisdiction in which the naming system is intended to be used.

Provides guidance on the use of the namespace, including the handling of formatting characters, use of upper vs. lower case, etc.

Indicates how the system may be identified when referenced in electronic exchange.

Multiple identifiers may exist, either due to duplicate registration, regional rules, needs of different communication technologies, etc.

Identifies the unique identifier scheme used for this particular identifier.

Different identifier types may be used in different types of communications (OIDs for v3, URIs for FHIR, etc.). Other includes RUIDs from v3, standard v2 code name strings, etc.

The string that should be sent over the wire to identify the code system or identifier system.

If the value is a URI intended for use as FHIR system identifier, the URI should not contain "\" or "?" or "," since this makes escaping very difficult.

Indicates whether this identifier is the "preferred" identifier of this type.

Notes about the past or intended usage of this identifier.

e.g. "must be used in Germany" or "was initially published in error with this value".

Identifies the period of time over which this identifier is considered appropriate to refer to the naming system. Outside of this window, the identifier might be non-deterministic.

Within a registry, a given identifier should only be "active" for a single namespace at a time. (Ideally, an identifier should only ever be associated with a single namespace across all time).

For naming systems that are retired, indicates the naming system that should be used in their place (if any).