Nigeria Core - FHIR Implementation Guide
0.0.0 - draft Nigeria flag

Nigeria Core - FHIR Implementation Guide, published by NDHI. This guide is not an authorized publication; it is the continuous build for version 0.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/digitalhealth-gov-ng/Nigeria-Core/ and changes regularly. See the Directory of published versions

CodeSystem: NG Provenance Activity Codes

Official URL: https://fhir-ig.digitalhealth.gov.ng/CodeSystem/ng-provenance-activity-cs Version: 0.0.0
Active as of 2026-04-20 Computable Name: NgProvenanceActivityCS

Local CodeSystem defining provenance activity codes for data lifecycle operations such as anonymization, de-identification, labeling, creation, and deletion, aligned to DHIN 2025 Connectathon artifacts.

This Code system is referenced in the content logical definition of the following value sets:

This case-insensitive code system https://fhir-ig.digitalhealth.gov.ng/CodeSystem/ng-provenance-activity-cs defines the following codes in a Grouped By hierarchy:

CodeDisplayDefinition
ANONY Anonymize Activity that removes all personally identifiable information (PII) to prevent re-identification.
DEID De-identify Activity that removes or obfuscates personal identifiers while retaining data usability.
MASK Mask Activity that hides or replaces specific data elements with placeholder values.
LABEL Assign Security Label Activity that applies confidentiality, sensitivity, or purpose-of-use labels to data.
PSEUD Pseudonymize Activity that replaces direct identifiers with pseudonyms that can be re-linked under controlled conditions.
CREATE Create Activity representing the creation of new data or resource instance.
DELETE Delete Activity representing deletion or removal of a data record.
APPEND Append Activity representing addition of new information to an existing resource or record.
NULLIFY Nullify Activity that invalidates or renders data non-usable without deleting the record.
LA Legally Authenticated Activity confirming legal authentication of a record (e.g., signed or witnessed by authorized person).