Credential Engine Technical Site

Welcome to the Credential Engine Technical Site where you will find complete documentation on our:

  • Credential Transparency Description Language open family of schemas
  • Data publishing tools including the Registry Publishing Assistant API
  • Credential Registry Handbook
  • Credential Registry Policy
  • Consuming services from the Registry
  • Learner and Worker Records Guide
  • Quick Start Guides
  • Other tools including those for mapping to the schemas, serializations.

To get started with using the Credential Registry data publishing and consuming tools, begin by setting up your Credential Engine account and let us know if you have any questions.

Technical Services and Advisory Group

Technical Services

We specialize in helping organizations define, implement, and derive value from general open data strategies as well as from the Credential Registry and other Credential Engine services. Our areas of focus include credentials, skills and competencies, education and career pathways, transfer value, and quality assurance.

CTDL Advisory Group

The CTDL Advisory Group is open to anyone interested in participating with feedback on development of the CTDL and other Credential Engine technologies and services and with supporting alignment with other standards.


Developers are able to leverage the the Credential Registry API to build applications that can read or publish as much or as little information about credentials as they need to.

The Credential Engine project's developers are using Dublin Core Application Profiles process to create systems that communicate all virtually all aspects of credentials.

Use the CTDL Schemas

The Credential Transparency Description Language (CTDL) is available to use with data design, with interoperable learner/worker records, and for publishing information as linked data.

Explore the CTDL Handbook, Terms, Serializations, LER Guide, and other resources for using CTDL on this site.

Publishing Options

Credential Engine offers the following options for publishing to the Credential Registry:

  • Registry Assistant Publishing API
  • Manual Entry
  • Bulk Upload

For more information on setting up your account and getting started with any of the publishing methods, click here.

Search Options

Credential Engine offers a robust search API to enable developers to leverage the wealth of data contained in the registry, using the CTDL and CTDL-ASN schemas.

Credential Engine offers a way for non-technical participants to enable a credential search on their own website. The Credential Finder Widget can be customized to match your site's theme and your preferences for automatic filtering, so that the results it shows can be more closely tailored to your site's purposes.

Join Credential Engine

Visit the Credential Engine website to:

  1. Learn more about Credential Engine
  2. Subscribe to updates
  3. Become a participant or partner

Get started with Credential Engine today by:

  1. Create or Login to your Credential Engine account
  2. Get your organization approved to publish and/or consume
  3. Learn more about CTDL, the Registry, and the publishing and consuming APIs


Action Items and Follow-Up: CTDL Education and Employment Outcomes Metrics Terms Proposal
Posted on 7/17/2024

Thank you to everyone who participated in the Education and Employment Outcomes Metrics (EEOM) Task Group and attended the July 10, 2024, CTDL EEOM Terms Proposal Webinar. The webinar recording, audio, transcript, and presentation are now available for your review. The presentation has also been attached to this email as a powerpoint, for those that cannot access Google docs.

Your input is highly valued, and we appreciate your contributions. Following the webinar, we are entering a comment period, and we invite you to provide feedback on the CTDL EEOM Proposal by Friday, July 31, 2024. You can share your feedback through any of the following methods:

The updates to the CTDL EEOM terms are part of an organized process to enhance the CTDL Linked Open Data. Credential Engine's plan includes updating the CTDL and implementing these changes within the Credential Registry Publishing System. Further details on these updates will be provided soon.

If you have any questions or need additional information, please do not hesitate to contact us at

This information is also available on our website here.

Qualifications Frameworks as Data Global Task Group: Invitation to Participate
Posted on 7/9/2024

Introduction: In today's interconnected world, transparently and accurately representing qualifications across borders is vital for mobility. Qualifications frameworks provide a structured approach to defining and comparing different types and levels of credentials. They are essential for understanding the equivalence of education and training qualifications across different systems and jurisdictions, thereby enabling more opportunities for learners and workers.

The diversity of these national, regional and international frameworks provides an opportunity to improve understanding, increase adoption and use, and provide greater value for learner mobility. The role of qualifications frameworks is further enhanced when they are also structured as linked, open data. Benefits include:

  • Enhanced Interoperability: Creating a unified linked open data model will enable seamless integration and comparison of qualifications across different jurisdictions.
  • Increased Transparency: Providing clear, accessible, and standardized information about qualifications will help everyone make informed decisions.
  • Supported Mobility: Standardizing a shared, open structure for qualifications data transparency will facilitate the modernization of credential recognition globally, supporting the movement of learners and workers and enhancing their opportunities.
  • Enabled Alignment: Enabling the alignments between qualification frameworks will support a cohesive understanding of educational standards and outcomes across nations and regions.
  • Facilitated Linking: Directly linking credentials and related programs to qualifications frameworks and other important information such as quality assurance.
  • Improved AI analysis: Providing qualification frameworks as structured linked open data improves the accuracy and effectiveness of AI tools and processes that connect, combine, and compare data from numerous sources.

Short-Term Task Group: Credential Engine is hosting a targeted task group that is open to subject matter experts worldwide. The group aims to represent qualifications frameworks as linked, open data. By participating in the Qualifications Frameworks as Data Global Task Group, members will play a vital role in improving how linked, open and interoperable data meets the evolving needs of credentialing ecosystems. This is a short-term commitment with guaranteed outcomes.

What to Expect: As a member of this task group, you'll participate as a subject matter and/or technical expert. Together, we'll define the task group's charter, generate use cases, define a CTDL data model, and propose new terms to describe a wide range of qualification frameworks and their relationships to credentialing organizations, credentials, learning programs, assessments, quality assurance actions, and other relevant entities.

Who Should Join: We are looking for subject matter and technical experts across a wide spectrum of fields, including: education, training, policy, government, research, industry, and business. If you fall into any of the following categories, we invite you to be part of our dynamic group. We welcome individuals from various backgrounds and roles, and we encourage you to join this task group, regardless of your geographical location or prior CTDL knowledge.

  • Subject Matter Experts have experience in developing, reviewing, implementing, and/or approving qualification frameworks.
  • Users of Qualifications Frameworks actively use qualifications frameworks in their work, including evaluating credential equivalencies, designing and delivering curriculum and credentials, and conducting research.
  • Education and Career Pathway Experts have a background in designing or implementing qualifications frameworks that support flexible learning pathways or in designing or implementing education and career pathways and using tools that include qualifications frameworks in their design.
  • Technical Experts know existing standards or technical implementations for qualifications frameworks.

By bringing together individuals with diverse perspectives and experiences, we aim to create a collaborative environment that fosters innovation and inclusivity. At Credential Engine, we believe that diversity in knowledge and expertise is key to our mission's success.

When and Where: The task group is anticipated to begin on Thursday, August 29, 2024 and will have approximately six, one-hour bi-weekly meetings via Zoom. The meeting schedule is as follows at 10:00 am Eastern Time. (See the World Clock for your local time.)

All meetings will be recorded, and materials will be shared with all participants.

Join the Qualifications Frameworks as Data Global Task Group

Resources: Credential Engine will create and provide all resources needed for this work, based on task group input, and share them for ongoing feedback between meetings. All feedback and materials are transparently available following an open development process.

Outcomes: The final products of this work include the expanded use cases, real-world data examples, and a CTDL domain model and terms with definitions. All outputs from the process are public information made available under open licenses.

Processes: The task group follows a defined process leading to specific deliverables and outcomes. The resultant outputs will be reviewed via an open webinar for Credential Engine's task group members and other stakeholders, followed by a public comment period. This efficient process ensures orderly changes that support and expand the durable, persistent value of CTDL Linked Open Data. Once this process is completed, the CTDL family of standards and handbook will be updated, along with the Credential Registry publishing and consuming tools. The Registry and related tools and resources are freely available for publishing data using CTDL.We develop the CTDL in alignment with other global data standards and projects to ensure mutual benefit. This approach allows CTDL to incorporate aspects of other standards and projects, while also enabling those standards and projects to utilize the work of this group, thus creating multiple benefits beyond CTDL itself.

Contact Credential Engine: If you have any questions about this task group, please email This mailbox is monitored during normal U.S. business hours. Learn more via the Credential Engine Website.

Visit our website: Invitation to Participate: Qualifications Frameworks as Data Global Task Group | Credential Engine

Invitation to Provide Input: CTDL Definitions for Education and Employment Outcomes Metrics
Posted on 6/20/2024

Credential Engine is enhancing data transparency for education and employment outcomes metrics to ensure that everyone - from educators and employers to policymakers and learners - has access to clear, actionable data for making informed decisions about learning and career pathways. Credential Engine is hosting a webinar on July 10th where we are requesting your expertise and feedback to confirm the proposed education and employment outcome metrics additions to the Credential Transparency Description Language (CTDL). It is not required to attend the webinar to provide input.

The CTDL Education and Employment Outcomes Metrics Task Group, which included experts from a variety of organizations, collaborated with Credential Engine to introduce new terms, definitions, and usage guidance around education and employment outcomes. This proposal aims to improve the clarity and transparency of metrics that play a pivotal role in learning and work ecosystems.

This proposal complements the existing capabilities CTDL has to describe a wide range of education and employment outcomes metrics, credentials, learning opportunities, competencies, assessments, jobs, pathways, and more. It refines the granularity of valuable data for greater clarity and transparency.

You can provide feedback by reviewing the CTDL Education and Employment Outcomes Terms Proposal and adding your comments or by reviewing the proposal and emailing You can also learn more and engage with the Credential Engine team in our webinar on this topic.

  • Webinar: CTDL Education and Employment Metrics Terms Proposal Webinar
  • Audience: Anyone interested in learning about this CTDL terms proposal and engaging in an opportunity to provide input.
  • Date: Wednesday, July 10, 2024
  • Time: 11:00 am ET (See the World Clock for your time zone.)
  • Registration: To register, please click here.
  • Additional Information: The webinar will be recorded and made publicly available, along with meeting materials, as part of Credential Engine’s open participatory processes.

Your engagement and insights are vital to the evolution of CTDL. We appreciate your interest and active participation in the CTDL development process. For additional information, please visit the Credential Engine website.


Clearly Define Different Types of Certificates with CTDL
Posted on 3/25/2024

The Credential Transparency Description Language (CTDL) has recently been updated to encompass the broad diversity of certificates available for people to earn. CTDL now defines 22 types of certificates, with numerous terms available to give them meaning, differentiate among different types of certificates, and make their value transparent. With such a diverse range of certificates, from acknowledging participation to demonstrating skills in academic or career fields, CTDL provides essential information for illuminating paths to a better future.

Join us to learn about the CTDL certificate updates and explore this diverse landscape to discover how CTDL can benefit everyone.

During this webinar, you'll:

  • Gain insights into the various types of certificates, along with other types of credentials, described with CTDL.
  • Discover options for publishing certificates and other credentials as CTDL linked open data.
  • Learn how to access and utilize certificate and credential data from the Registry.
  • Receive step-by-step guidance on publishing certificates and other credentials to the Credential Registry.

Certificate Type Webinar Details:

  • Date: April 11, 2024
  • Time: 1:00 PM EST
  • Location: Virtual via Zoom
  • Audience: Professionals involved in creating, sharing, storing, and consuming certificates and other types of credentials, and anyone curious about how CTDL and the Registry support the diversity of types of certificates in learn and work ecosystems.
  • Registration: Click Here

Stay ahead in the field of credential transparency. Join us for this informative session and unlock the full valuable information using CTDL to the benefit of everyone.

Visit the Credential Engine Website to view this announcement: Clearly Define Different Types of Certificates with CTDL | Credential Engine

Contact us with any questions via

Don't miss out – register now!

Unlock Skill Assessment Potential with CTDL Rubric
Posted on 3/11/2024

Thank you to all who attended the February 29, 2024 CTDL Rubrics Webinar. The webinar via YouTube, audio recordings and presentation via Google Drive are available for your review.

CTDL rubrics offer versatility, applicable not only for assessing individuals' skills but also for evaluating organizational capabilities and assessing the quality or suitability of products, services, and more. The benefits of utilizing CTDL Linked Open Data Structure extend to all.

During the webinar, we delved into the CTDL update process and highlighted the latest enhancements supporting detailed Rubric descriptions. We introduced options for publishing and consuming rubric data:

  • Credential Registry Publishing Options: Bulk uploading via a CSV file and Publishing Assistant API
  • Credential Registry Consuming Options: Access records, perform search queries, download or import data for offline use, or utilize the credential finder widget.

A special thanks to our partners, the American Association of Colleges and Universities (AAC&U) and the Competency-Based Education Network (C-BEN), for sharing their Rubrics as CTDL Linked Open Data via the Credential Registry. Explore their Rubrics at

Start Publishing and Consuming CTDL Rubrics: Feeling inspired to start publishing and exploring the Credential Registry data consumption options? Here's how to get started:

  1. Create or log in to your Credential Registry Account at
  2. Begin publishing Rubrics to the Credential Registry. Refer to the Credential Registry Guidance Site for instructions for using the bulk upload CSV option and the Credential Registry Assistant API Handbook.
  3. Start consuming Rubric Data from the Registry at

This information is also available on our website: Unlock Skill Assessment Potential with CTDL Rubric | Credential Engine

For any inquiries or assistance, please contact