Current Build
This profile describes common extensions that are used with OperationOutcomes
Extensions:
operationoutcome-issue-sourceSource of a validation message :

Helps a user track down the source of the problem.

operationoutcome-authorityReference to where the rule is defined :

A reference to where the rule is defined (based on the authoritative URLs in the applicanble conformance resources).

operationoutcome-detectedIssueReference to a contra-indication that is the basis for this error :

A reference to a stored contraindication that is the basis for this issue. A recipient can expect that the item referenced in this extension is being retained for record keeping purposes.

operationoutcome-expressionFHIR Path version of error location :

The error location as specified using FHIRPath language.