IMS Comprehensive Learner Record (CLR) JSON Schema Version 1.0

IMS Candidate Final
Version 1.0
IMS Candidate Final
Date Issued: February 7, 2020
Status: This document is for review and adoption by the IMS membership.
This version:

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The IMS Comprehensive Learner Record (CLR) specification has been designed to create, transmit, and render an individual's set of achievements, as issued by multiple learning providers, in a machine-readable format that can be curated into verifiable digital records of achievement.

1. Introduction

The IMS Comprehensive Learner Record (CLR) specification supports interoperability in that CLR publishers and consumers can consistently send, receive, and verify records among conformant systems. The CLR specification describes an information model, service definition, and implementation guide to allow institutions, suppliers, and others to 'extend' the traditional transcript with records and types of information that are typically not found in a traditional transcript, such as competency attainment, co-curricular activities, Open Badges, and to define and facilitate an institution's learner achievements record store for collection of CLRs.

CLR data can be consumed by other schools, institutions, employers, and any other entities that are conformant as CLR consumers. In this machine readable format, CLR data enables granular and expansive discoverability of learning achievements and competencies that was not previously possible.

1.1 Status of this Document

This document is the Candidate Final release, meaning the technical specification is also in Candidate Final status. IMS members are currently working towards successful completion of conformance certification.

IMS strongly encourages its members and the community to provide feedback to continue the evolution and improvement of the CLR standard. To join the IMS developer and conformance certification community focused on CLR please visit the IMS Digital Credentials and Badging Alliance online here:

1.2 Specification Documents

CLR specification documents are available on the IMS website:

1.3 Where Can I Get Help?

If you have questions or need help with implementing CLR or achieving conformance certification, here are some available resources:

Conformance Certification

IMS offers a process for testing the conformance of products using the IMS certification test suite. Certification designates passing a set of tests that verify the standard has been implemented correctly and guarantees a product’s interoperability across hundreds of other certified products. The CLR Conformance Certification Guide [CLR-CERT-10] provides details about the testing process, requirements, and how to get started.

Conformance certification is much better than claims of “compliance," since the only way IMS can guarantee interoperability is by obtaining certification for the latest version of the standard. Only products listed in the official IMS Certified Product Directory can claim conformance certification. IMS certification provides the assurance that a solution will integrate securely and seamlessly into an institution's digital learning ecosystem.

In order to become certified a paid IMS membership is necessary. Here's why: while conformance certification provides a "seal" for passing prescribed tests it is much more than that. It is a commitment by a supplier to the IMS community for continuous support for achieving "plug and play" integration. Certification implies ongoing community commitment to resolve problems, revise implementations and retest as need. For that reason, only IMS Contributing Members, Affiliate Members and Alliance members are eligible to apply for conformance certification. Details and benefits of membership are listed here:

This document is an informative resource in the Document Set of the Comprehensive Learner Record specification [CLR-10]. As such, it does not include any normative requirements. Occurrences in this document of terms such as MAY, MUST, MUST NOT, SHOULD or RECOMMENDED have no impact on the conformance critera for implementors of this specification.

1.4 Product Directory Listing

The IMS Certified Product Directory is the official listing of products that have passed IMS Global conformance certification testing. Products that are listed in this directory are guaranteed to meet the IMS standards for which they have passed testing. If you experience an integration issue with a product listed here, IMS will work with the supplier to resolve the problem. If a product is NOT listed here it has either not passed IMS testing or its certification has expired.

1.5 Key Terms and Definitions

A document of structured data created by a Publisher containing one or more Assertions about one Learner.
An accomplishment such as a degree, evidence of competency mastery, a course completion, or other accomplishment. An achievement may be asserted about one or more Learners (though a CLR contains records for only one Learner). Achievements may include a label (e.g. certificate, competency, course, degree, etc.) and type (e.g. CTDL credential, CASE competency, Open Badge, IMS assessment result, etc.).
The attestation made by an Issuer about a Learner regarding an Achievement. The Assertion may also include associated evidence, results, or other metadata regarding a specific Achievement.
A relationship (e.g. isChildOf, precedes, etc.) between multiple achievements.
A REST API actor that makes requests to CLR endpoints on a Provider.
Information supporting the issuance of an assertion such as URL to an artifact produced by the Learner.
A Consumer that inspects a CLR to verify or validate the data.
The profile of an organization or entity that has made a particular Assertion about a Learner. The Issuer of an Assertion is the authoritative source for that specific Assertion.
The profile of the person who is the subject of the CLR and assertions contained in a CLR.
Protected Information
In the United States, the Family Educational Rights and Privacy Act (FERPA) is a Federal Law that protects personally identifiable information (PII) from students' educational records from unauthorized disclosure. CLRs fall within the definition of educational records; and the CLR Learner Profile contains PII. Therefore FERPA may apply to some uses of the CLR spec.
A REST API actor that responds to requests to CLR endpoints from a Consumer.
The profile of the organization providing the CLR (typically the educational institution, a 3rd-party agent, or the learner). The Publisher is the official record keeper for Assertions in a CLR. In the majority of cases, the Publisher is also the Issuer of some or all of the Assertions in a CLR. Except in the case of a self-curated CLR, the publisher is either the issuer or has a trusted relationship with the issuer of all the Assertions in the CLR. In the case of a self-curated collection of Assertions, the Learner is the Publisher of the CLR.
Instructive information for third parties to verify Assertions.

2. JSON Schema Files

This CLR JSON Schema file can be used to validate the JSON in the request payload.

Operation Payload JSON Schema
postClr schema

These CLR JSON Schema files can be used to validate the JSON returned by each operation endpoint response.

Operation HTTP Status Codes Response JSON Schema
deleteClr 204, 205, 400, 401, 403, 404, 421 schema
getAssertion 200, 410 schema
getAssertion 404, 421 schema
getClr 200, 410 schema
getClr 400, 401, 403, 404, 421 schema
getClrs 200 schema
getClrs 400, 401, 403, 404, 421 schema
getDiscoveryDocument 200 schema
getDiscoveryDocument 404, 421 schema
getEndorsement 200, 410 schema
getEndorsement 404, 421 schema
getKey 200 schema
getKey 404, 421 schema
getRevocationList 200 schema
getRevocationList 404, 421 schema
postClr 200, 201 schema
postClr 205, 304, 400, 401, 403, 404, 421 schema
postClr payload schema

3. About this Document

A. Revision History

This section is non-normative.

A.1 Version History

Version No. Release Date Comments
Version 1.0 August 26, 2019 The first release.

B. References

B.1 Normative references

IMS Comprehensive Learner Record (CLR) Specification Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) Conformance and Certification Guide Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) Implementation Guide Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) Information Model Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) JSON Schema Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) JSON-LD Context Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) OpenAPI Schema Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
IMS Comprehensive Learner Record (CLR) REST/JSON Binding Version 1.0. IMS Global. February 7, 2020. IMS Candidate Final. URL:
Key words for use in RFCs to Indicate Requirement Levels. S. Bradner. IETF. March 1997. Best Current Practice. URL:

C. List of Contributors

The following individuals contributed to the development of this document:

Name Organization Role
Tamer AbuelsaadIBM
Jeff BohrerIMS Global
Sherri BraxtonUniversity of Maryland, Baltimore County
Deb EverhartLearning Objects
Steve GraceWA Comm & Tech Colleges
Matthew HailstoneBrigham Young University
Chris HoustonCapella UniversityCo-Chair
Alex HripakCredly
Mark LeubaIMS Global
Jeff McNealState of Michigan Department of Education
Andy MillerIMS Global
Greg NadeauPublic Consulting GroupCo-Chair
Nate OttoConcentric Sky
Ozgur YogurtcuAEFIS