FHIRPath Operator: in (in)

If the left operand is a collection with a single item, this operator returns true if the item is in the right operand using equality semantics. If the left-hand side of the operator is empty, the result is empty, if the right-hand side is empty, the result is false. If the left operand has multiple items, an exception is thrown.

The following example returns true if 'Joe' is in the list of given names for the Patient:

'Joe' in Patient.name.given

Summary

• Category: Collections
• Section: 6.4.2
• Left Argument: Any
• Right Argument: collection
• Return Type: Boolean
• Empty Input Result: empty
• Errors on Multiple Input: true

Description

Returns true if the item in the left operand (single item collection) is in the right operand using equality semantics. If the left-hand side is empty, the result is empty; if the right-hand side is empty, the result is false. Throws an exception if the left operand has multiple items.

Type Mapping

• Any-collection