Basic Audit Log Patterns (BALP), published by IHE IT Infrastructure Technical Committee. This guide is not an authorized publication; it is the continuous build for version 1.1.4-current built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/IHE/ITI.BasicAudit/ and changes regularly. See the Directory of published versions

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Extension: AuditEvent.agent Assurance Level

Official URL: https://profiles.ihe.net/ITI/BALP/StructureDefinition/ihe-assuranceLevel				Version: 1.1.4-current
Active as of 2025-09-05				Computable Name: AssuranceLevel

The assuranceLevel element carries various types of Assurance level. May be an Identity Assurance (IAL), an Authentication Assurance Level (AAL), a Federation Assurance Level (FAL), or other.

In SAML this is defined to be carried in the saml:AuthnContextClassRef, but may be carried elsewhere based on the use-case and profiling of SAML.

The Vocabulary is not defined here. Some sources of vocabulary:

• HL7 v3 Security Trust Assurance ValueSet. These include ISO-7498-2, NIST 800-63-1, and NIST-800-63-2.
• idmanagement.gov published on login.gov
  • this is defined to be carried in the saml:AuthnContextClassRef
• OASIS Authentication Context for SAML
• An example of a customized and purpose defined small set of codes can be found in the HL7 SMART Health Cards defines a valueset

Context of Use

This extension may be used on the following element(s):

• Element ID AuditEvent.agent

Usage info

Usages:

• Use this Extension: Basic AuditEvent pattern for when an activity was authorized by an SAML access token Comprehensive and Basic AuditEvent pattern for when an activity was authorized by an SAML access token Minimal
• Examples for this Extension: AuditEvent/ex-auditPoke-SAML-Comp and AuditEvent/ex-auditPoke-SAML-QDI-Comp

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

Path	Conformance	ValueSet	URI
Extension.value[x]	preferred	SecurityTrustAssuranceObservationValue http://terminology.hl7.org/ValueSet/v3-SecurityTrustAssuranceObservationValue

Constraints

Id	Grade	Path(s)	Details	Requirements
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()