FHIRPath Function: is

The is() function is supported for backwards compatibility with previous implementations of FHIRPath. Just as with the is keyword, the type argument is an identifier that must resolve to the name of a type in a model. For implementations with compile-time typing, this requires special-case handling when processing the argument to treat it as a type specifier rather than an identifier expression:

Bundle.entry.resource.all($this.is(Observation) implies status = 'finished')

Note: The is() function is defined for backwards compatibility only and may be deprecated in a future release.

Summary

• Category: Types
• Section: 6.3.2
• Return Type: Boolean
• Empty Input Result: empty
• Errors on Multiple Input: true

Description

The is() function is supported for backwards compatibility with previous implementations of FHIRPath. Just as with the is keyword, the type argument is an identifier that must resolve to the name of a type in a model.

Arguments

• type: type specifier - Type to check against

Type Mapping

• n/a

Example

Bundle.entry.resource.all($this.is(Observation) implies status = 'finished')