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.

March 2026 CTDL Release (20260327) (Current Release)

This is the March 2026 CTDL release.

View Terms | Jump to Mapping Changes

ceterms:learningDeliveryDescription View Term History: JSON Turtle

Change:

schema:domainIncludes: Added ceterms:AssociateDegree
schema:domainIncludes: Added ceterms:ApprenticeshipCertificate
schema:domainIncludes: Added ceterms:Certification
schema:domainIncludes: Added ceterms:ProfessionalDoctorate
schema:domainIncludes: Added ceterms:Certificate
schema:domainIncludes: Added ceterms:AssociateOfAppliedArtsDegree
schema:domainIncludes: Added ceterms:SecondarySchoolDiploma
schema:rangeIncludes: Added rdf:langString
vs:term_status: Added vs:unstable
schema:domainIncludes: Added ceterms:ProfessionalCertificate
schema:domainIncludes: Added ceterms:MasterOfScienceDegree
schema:domainIncludes: Added ceterms:GeneralEducationLevel1Certificate
schema:domainIncludes: Added ceterms:BachelorOfArtsDegree
schema:domainIncludes: Added ceterms:License
schema:domainIncludes: Added ceterms:PreApprenticeshipCertificate
schema:domainIncludes: Added ceterms:BachelorDegree
schema:domainIncludes: Added ceterms:ResearchDoctorate
schema:domainIncludes: Added ceterms:MasterDegree
schema:domainIncludes: Added ceterms:Badge
schema:domainIncludes: Added ceterms:AssociateOfArtsDegree
schema:domainIncludes: Added ceterms:WorkBasedLearningCertificate
schema:domainIncludes: Added ceterms:AssociateOfScienceDegree
schema:domainIncludes: Added ceterms:MasterCertificate
schema:domainIncludes: Added ceterms:HigherEducationLevel1Certificate
schema:domainIncludes: Added ceterms:SpecialistDegree
schema:domainIncludes: Added ceterms:PostMasterCertificate
schema:domainIncludes: Added ceterms:SecondaryEducationCertificate
schema:domainIncludes: Added ceterms:Diploma
schema:domainIncludes: Added ceterms:DoctoralDegree
schema:domainIncludes: Added ceterms:HigherEducationLevel2Certificate
rdfs:label: Added
en-US Learning Delivery Description
schema:domainIncludes: Added ceterms:Credential
schema:domainIncludes: Added ceterms:QualityAssuranceCredential
rdfs:comment: Added
en-US Detailed description of the mode of delivery for the learning opportunity for the credential.
schema:domainIncludes: Added ceterms:JourneymanCertificate
schema:domainIncludes: Added ceterms:TechnicalLevel1Certificate
schema:domainIncludes: Added ceterms:MicroCredential
schema:domainIncludes: Added ceterms:BasicTechnicalCertificate
schema:domainIncludes: Added ceterms:MasterOfArtsDegree
schema:domainIncludes: Added ceterms:GeneralEducationLevel2Certificate
schema:domainIncludes: Added ceterms:Degree
schema:domainIncludes: Added ceterms:TechnicalLevel2Certificate
schema:domainIncludes: Added ceterms:PostBaccalaureateCertificate
schema:domainIncludes: Added ceterms:CertificateOfParticipation
schema:domainIncludes: Added ceterms:BachelorOfScienceDegree
schema:domainIncludes: Added ceterms:TechnicalLevel3Certificate
schema:domainIncludes: Added ceterms:AssociateOfAppliedScienceDegree
schema:domainIncludes: Added ceterms:ProficiencyCertificate
schema:domainIncludes: Added ceterms:AcademicCertificate
schema:domainIncludes: Added ceterms:GeneralEducationDevelopment
schema:domainIncludes: Added ceterms:DigitalBadge
schema:domainIncludes: Added ceterms:CertificateOfCompletion
schema:domainIncludes: Added ceterms:OpenBadge

Reason:

en-US Allow descriptions of the learning delivery type for a credential

https://github.com/CredentialEngine/Schema-Development/issues/990

ceterms:learningDeliveryType View Term History: JSON Turtle

Change:

rdfs:subPropertyOf: Removed ceterms:deliveryType

Reason:

en-US Remove semantic error.

https://github.com/CredentialEngine/Schema-Development/issues/990

collectionCategory:Competency View Term History: JSON Turtle

Change:

vann:usageNote: Added
en-US Use ceasn:CompetencyFramework for aggregations of competencies that are logically related.
vs:term_status: Added vs:unstable
skos:definition: Added
en-US Aggregation of Competencies.
skos:prefLabel: Added
en-US Competency
skos:inScheme: Added ceterms:CollectionCategory
skos:topConceptOf: Added ceterms:CollectionCategory

Reason:

en-US Classify collections of competencies.

https://github.com/CredentialEngine/Schema-Development/issues/1052

costType:Consumables View Term History: JSON Turtle

Change:

skos:definition: Added
en-US Cost for supplies or materials that are depleted or replaced.
skos:prefLabel: Added
en-US Consumables
vann:usageNote: Added
en-US For resources such as textbooks use costType:LearningResource.
vs:term_status: Added vs:unstable
skos:topConceptOf: Added ceterms:CostType
skos:inScheme: Added ceterms:CostType

Reason:

en-US Supplies/equipment can be costs.

https://github.com/CredentialEngine/Schema-Development/issues/975

costType:Equipment View Term History: JSON Turtle

Change:

skos:prefLabel: Added
en-US Equipment
vann:usageNote: Added
en-US For resources such as textbooks use costType:LearningResource.
skos:inScheme: Added ceterms:CostType
vs:term_status: Added vs:unstable
skos:definition: Added
en-US Cost for durable tools, instruments or machines.
skos:topConceptOf: Added ceterms:CostType

Reason:

en-US Supplies/equipment can be costs.

https://github.com/CredentialEngine/Schema-Development/issues/975

costType:PersonalExpenses View Term History: JSON Turtle

Change:

skos:inScheme: Added ceterms:CostType
skos:definition: Added
en-US Cost for personal living or incidental expenses.
skos:broader: Added ceterms:CostType
vs:term_status: Added vs:unstable
skos:prefLabel: Added
en-US Personal Expenses
vann:usageNote: Added
en-US Where possible use a more specific Cost Type, such as costType:Travel or costType:Meals.