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If OIDs are used they SHALL be prefixed with urn:oid:
per the OID primitive datatype definition.
When remote value sets are referenced in Questionnaires, full URLs are recommended. If you are using local value sets a relative path is recommended.
Note: Expanding a large value set at run time, may slow down your DTR app. In other words having your value set already expanded could give the user a better client side experience.
When referencing expressions in libraries such as a CQL library, the name of the library should be included.
e.g., “expression”: “\“LowerLimbProsthesis\“.PhysicalExaminationType”
In this example above LowerLimbProsthesis
is the library name
and PhysicalExaminationType
is the expression name
.
When developing FHIR Libraries that depend on CQL content, the content element SHALL include the data
element. Note: The use of the data
element requires it to contain a base-64 encoded string that represents the CQL file per the attachment specification.
For example, see the below snippet from a FHIR Library:
Note: Although the use of url
in the content element is valid, using the data
element should be more interoperable.