Defines an extension that can be used in resources.

The URL at which this definition is (or will be) published, and which is used to reference this profile in extension urls in operational FHIR systems.

So you can say, in a profile, what the full extensions URL should be. This is required to allow hosting profiles on multiple different servers, and to allow for the editorial process.

Formal identifier that is used to identify this profile when it is represented in other formats (e.g. ISO 11179(, or referenced in a specification, model, design or an instance (should be globally unique OID, UUID, or URI), (if it's not possible to use the literal URI).

The identifier that is used to identify this version of the extension definition when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the author manually.

There may be multiple resource versions of the extension definition that have this same identifier. The resource version id will change for technical reasons, whereas the stated version number needs to be under the author's control.

N/A.

A free text natural language name identifying the extension.

Not expected to be globally unique.

Defined so that applications can use this name when displaying the value of the extension to the user.

Applications don't have to use this name, but can always fall back to it. In the absence of a value for this element, use the name.

The name of the individual or organization that published the extension definition.

Helps establish the "authority/credibility" of the extension definition. May also allow for contact.

Usually an organization, but may be an individual. This item SHOULD be populated unless the information is available from context.

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

May be a web site, an email address, a telephone number (tel:), etc.

The name of an individual to contact regarding the extension definition.

If there is no named individual, the telecom is for the organization as a whole.

Contact details for individual (if a name was provided) or the publisher.

A free text natural language description of the extension and its use.

This field can be used for things such as comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the extension definition as conveyed in Profile.text.

A set of terms from external terminologies that may be used to assist with indexing and searching of extension definitions.

Assist in searching for appropriate extensions.

The status of the extension.

Allows filtering of extnsions that are appropriate for use vs. not.

This extension definition was authored for testing purposes (or education/evaluation/marketing), and is not intended to be used for genuine usage.

Allows filtering of extensions that are appropriate for use vs. not.

The date that this version of the extension was published.

The Scope and Usage that this extension was created to meet.

An external specification that the content is mapped to.

An Internal id that is used to identify this mapping set when specific mappings are made.

The specification is described once, with general comments, and then specific mappings are made that reference this declaration in the element definition.

A URI that identifies the specification that this mapping is expressed to.

A formal identity for the specification being mapped to helps with identifying maps consistently.

A name for the specification that is being mapped to.

Comments about this mapping, including version notes, issues, scope limitations, and other important notes for usage.

Identifies the type of context to which the extension applies.

Identifies the types of resource or data type elements to which the extension can be applied.

If the context is an element that can have multiple types, then use (e.g.) value[x] if the extension works on all choice types, or otherwise an enumeration of explicitly named elements if not. Note that a context of "string" doesn't mean that the extension can be used with one of the string patterns such as "id" etc.

Definition of the elements that are defined to be in the extension.