Credential Transparency Description Language Release History

This page displays the release history for the Credential Transparency Description Language schema. Each release contains a set of changes, which are documented below. Each change describes what was changed, why, and links to one or more relevant Github issues.

August 2026 CTDL Release (20260828) (Current Release)

This is the August 2026 CTDL release.

View Terms | Jump to Mapping Changes

ceterms:associatedResourceDescription View Term History: JSON Turtle

Change:

  • schema:domainIncludes: Added ceterms:LearningProgram
  • vs:term_status: Added vs:unstable
  • vann:usageNote: Added
    en-US Where appropriate the description of the associated resource should include factors such as whether the resource is required or recommended.
  • rdfs:label: Added
    en-US Associated Resource Description
  • rdfs:comment: Added
    en-US Description of resources that support, supplement or are referenced during learning and assessment to which access may be required or recommended.
  • schema:rangeIncludes: Added rdf:langString
  • schema:domainIncludes: Added ceterms:AssessmentProfile
  • schema:domainIncludes: Added ceterms:Course
  • schema:domainIncludes: Added ceterms:LearningOpportunityProfile

Reason:

en-US Provide descriptions of learning resources associated with a course.
https://github.com/CredentialEngine/Schema-Development/issues/974

ceterms:contentDescription View Term History: JSON Turtle

Change:

Reason:

en-US Allow for a listing of the general topics, theory, practices, and concepts typically covered by a Learning Opportunity or class.
https://github.com/CredentialEngine/Schema-Development/issues/1078

costType:PersonalExpenses View Term History: JSON Turtle

Change:

Reason:

en-US Fix data entry error
https://github.com/CredentialEngine/Schema-Development/issues/1072

deliveryType:Asynchronous View Term History: JSON Turtle

Change:

  • vs:term_status: Added vs:unstable
  • skos:definition: Added
    en-US Delivery is such that participants are not expected to undertake activities simultaneously.
  • skos:topConceptOf: Added ceterms:Delivery
  • skos:prefLabel: Added
    en-US Asynchronous
  • New Item: Added ceterms:Delivery

Reason:

en-US Add ability to classify synchronous / asynchronous delivery.
https://github.com/CredentialEngine/Schema-Development/issues/1070

deliveryType:MixedSynchronous View Term History: JSON Turtle

Change:

  • skos:topConceptOf: Added ceterms:Delivery
  • skos:prefLabel: Added
    en-US Mixed Synchronous
  • skos:inScheme: Added ceterms:Delivery
  • skos:definition: Added
    en-US Delivery is such that participants are expected to undertake some, but not all, activities simultaneously.
  • vs:term_status: Added vs:unstable

Reason:

en-US Add ability to classify synchronous / asynchronous delivery.
https://github.com/CredentialEngine/Schema-Development/issues/1070

deliveryType:Synchronous View Term History: JSON Turtle

Change:

  • vs:term_status: Added vs:unstable
  • skos:prefLabel: Added
    en-US Synchronous
  • skos:topConceptOf: Added ceterms:Delivery
  • skos:inScheme: Added ceterms:Delivery
  • skos:definition: Added
    en-US Delivery is such that participants are expected to undertake activities simultaneously.

Reason:

en-US Add ability to classify synchronous / asynchronous delivery.
https://github.com/CredentialEngine/Schema-Development/issues/1070

learnMethod:InstructorLed View Term History: JSON Turtle

Change:

  • skos:topConceptOf: Added ceterms:LearningMethod
  • skos:inScheme: Added ceterms:LearningMethod
  • dct:description: Added
    en-US The subject matter expert is expected to be a human and may be known as an instructor, teacher, trainer.
  • vs:term_status: Added vs:unstable
  • skos:definition: Added
    en-US Learning activities are facilitated by a subject matter expert.
  • skos:prefLabel: Added
    en-US Instructor-Led

Reason:

en-US Add ability to classify instructor led learning.
https://github.com/CredentialEngine/Schema-Development/issues/1070

Mapping Changes Implemented in this Release

ceterms:AssessmentProfile

Changes to properties for this class:

ceterms:Course

Changes to properties for this class:

ceterms:LearningOpportunityProfile

Changes to properties for this class:

ceterms:LearningProgram

Changes to properties for this class: