Credential Transparency Description Language Release History

Contents

March 2025 CTDL Release (20250328) - Pending Release
January 2025 CTDL Release (20250131) - Current Release
August 2024 CTDL Release (20240830)
February 2024 CTDL Release (20240223)
October 2023 CTDL Release (20231027)
September 2023 CTDL Release (20230929)
May 2023 CTDL Release (20230526)
March 2023 CTDL Release (20230331)
February 2023 CTDL Release (20230224)
November 2022 CTDL Release (20221130)
September 2022 CTDL Release (20220930)
July 2022 CTDL Release (20220729)
June 2022 CTDL Release (20220624)
March 2022 CTDL Release (20220325)
October 2021 CTDL Release (20211029)
May 2021 CTDL Release (20210528)
March 2021 CTDL Release (20210326)
November 2020 CTDL Release (20201127)
October 2020 CTDL Release (20201030)
August 2020 CTDL Release (20200828)
July 2020 CTDL Release (20200731)
May 2020 CTDL Release (20200529)
April 2020 CTDL Release (20200424)
March 2020 CTDL Release (20200327)
November 2019 CTDL Release (20191129)
October 2019 CTDL Release (20191025)
August 2019 CTDL Release (20190830)
April 2019 CTDL Release (20190426)
March 2019 CTDL Release (20190301)
December 2018 CTDL Release (20181228)
October 2018 CTDL Release (20181026)
July 2018 CTDL Release (20180727)
April 2018 CTDL Release (20180427)
January 2018 CTDL Release (20180129)
October 2017 CTDL Release (20171027)
October 2017 CTDL Interim Definition Update (20171018)
August 2017 CTDL Release (20170825)
June 2017 CTDL Release (20170630)
April 2017 CTDL Release (20170428)
February 2017 CTDL Release (20170224)
Initial Release of CTDL (20161117)

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.

February 2017 CTDL Release (20170224)

View Terms | Jump to Mapping Changes

ceterms:actingAgent View Term History: JSON Turtle

Change:

owl:equivalentProperty: Added schema:agent
rdfs:comment: Added
en-US The direct performer or driver (animate or inanimate) of an action.
rdfs:range: Added ceterms:CredentialOrganization
rdfs:range: Added ceterms:QACredentialOrganization
rdfs:range: Added ceterms:CredentialPerson
rdfs:label: Added
en-US Acting Agent
rdfs:domain: Added ceterms:CredentialingAction
vann:usageNote: Added
en-US The organization or person performing an action.

Reason:

en-US Supersedes ceterms:agent and helps prevent confusion between ceterms:agent and ceterms:Agent

https://github.com/CredentialEngine/vocabularies/issues/286

ceterms:additionalCondition View Term History: JSON Turtle

Change:

vs:term_status: Added vs:unstable
vs:term_status: Removed vs:stable

Reason:

en-US Potentially replacing ceterms:additionalCondition with ceterms:alternativeCondition.

https://github.com/CredentialEngine/vocabularies/issues/297

ceterms:advancedStandingFrom View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/292

ceterms:agent View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Superseded by ceterms:actingAgent

https://github.com/CredentialEngine/vocabularies/issues/286

ceterms:alternativeCondition View Term History: JSON Turtle

Change:

rdfs:comment: Added
en-US A set of conditions in the context of requirements where more than one alternative set or path have been defined and from which any one path fulfills the parent conditions.
vs:term_status: Added vs:stable
rdfs:range: Added ceterms:ConditionProfile
rdfs:domain: Added ceterms:ConditionProfile
vann:usageNote: Added
en-US Two or more sets of alternative conditions are not necessarily mutually exclusive paths; for example, a set of alternative concentrations for a degree may allow a person to optionally complete more than one concentration even though only one is required to earn the degree.
rdfs:label: Added
en-US Alternative Condition

Reason:

en-US Enables multiple pathways to meet requirements.

https://github.com/CredentialEngine/vocabularies/issues/297

ceterms:audienceLevelType View Term History: JSON Turtle

Change:

vann:usageNote: Added
en-US Best practice is to use terms from the CTDL Audience Level vocabulary.
vann:usageNote: Removed
en-US Best practice for developing credential descriptions for the Credential Engine Registry is to use the CTDL AudienceLevel vocabulary.

Reason:

en-US Enhancement

https://github.com/CredentialEngine/vocabularies/issues/103

ceterms:broadAlignment View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:contactOption View Term History: JSON Turtle

Change:

rdfs:comment: Added
en-US An option available on this contact point.
rdfs:label: Added
en-US Contact Option
dcterms:description: Added
en-US For example, a toll-free number or support for hearing-impaired callers.
rdfs:domain: Added ceterms:ContactPoint
rdfs:range: Added rdfs:Literal

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:contactPoint View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:ContactPoint View Term History: JSON Turtle

Change:

rdfs:comment: Added
en-US A means of contacting a resource or its representative(s).
dcterms:description: Added
en-US For example, a public relations email address or phone number.
rdfs:comment: Removed
en-US A contact point--for example, a Customer Complaints department.
dcterms:description: Removed
en-US The means for communicating with a designated agent.

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:Course View Term History: JSON Turtle

Change:

rdfs:subClassOf: Added ceterms:LearningOpportunity

Reason:

en-US Enhancement

https://github.com/CredentialEngine/vocabularies/issues/303

ceterms:credentialProfiled View Term History: JSON Turtle

Change:

rdfs:domain: Removed ceterms:VerificationServiceProfile

Reason:

en-US Clarification/enhancement.

https://github.com/CredentialEngine/vocabularies/issues/300

ceterms:ctid View Term History: JSON Turtle

Change:

rdfs:domain: Removed ceterms:RegulateAction
rdfs:domain: Removed ceterms:CredentialOrganization
rdfs:domain: Removed ceterms:ProcessProfile
rdfs:domain: Removed ceterms:JurisdictionProfile
rdfs:domain: Removed ceterms:TaskProfile
rdfs:domain: Removed ceterms:EarningsProfile
rdfs:domain: Removed ceterms:CredentialingAction
rdfs:domain: Removed ceterms:GeoCoordinates
rdfs:domain: Removed ceterms:AccreditAction
rdfs:domain: Removed ceterms:PostalAddress
rdfs:domain: Removed ceterms:OfferAction
rdfs:domain: Removed ceterms:EmploymentOutcomeProfile
rdfs:domain: Removed ceterms:ConditionProfile
rdfs:domain: Removed ceterms:ApproveAction
rdfs:domain: Removed ceterms:CareerPathway
rdfs:domain: Removed ceterms:QACredentialOrganization
rdfs:domain: Removed ceterms:AdvancedStandingAction
rdfs:domain: Removed ceterms:IdentifierValueSet
rdfs:domain: Removed ceterms:CredentialFramework
rdfs:domain: Removed ceterms:VerificationServiceProfile
rdfs:domain: Removed ceterms:RightsAction
rdfs:domain: Removed ceterms:RecognizeAction
rdfs:domain: Removed ceterms:Competency
rdfs:domain: Removed ceterms:RevocationProfile
rdfs:domain: Removed ceterms:ContactPoint
rdfs:domain: Removed ceterms:CompetencyFramework
rdfs:domain: Removed ceterms:RenewAction
rdfs:domain: Removed ceterms:CredentialPerson
rdfs:domain: Removed ceterms:IdentifierValue
rdfs:domain: Removed ceterms:CredentialAlignmentObject
rdfs:domain: Removed ceterms:DurationProfile
rdfs:domain: Removed ceterms:HoldersProfile
rdfs:domain: Removed ceterms:CostProfile
rdfs:domain: Removed ceterms:LearningOpportunityProfile
rdfs:domain: Removed ceterms:RevokeAction
rdfs:domain: Removed ceterms:AssessmentProfile
rdfs:domain: Removed ceterms:FinancialAlignmentObject

Reason:

en-US These domains were not needed.

https://github.com/CredentialEngine/vocabularies/issues/267

ceterms:degreeConcentration View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:Degree
dcterms:description: Added
en-US Where possible, values should be taken from published frameworks defining degree majors, minors, and concentrations such as the U.S. National Center for Education Statistics' (NCES) Classification of Instructional Programs (CIP).
rdfs:range: Added ceterms:CredentialAlignmentObject
rdfs:domain: Added ceterms:MasterDegree
rdfs:domain: Added ceterms:AssociateDegree
rdfs:domain: Added ceterms:ceterms:BachelorDegree
rdfs:comment: Added
en-US A structured plan of study within a degree major.
rdfs:label: Added
en-US Degree Concentration
rdfs:domain: Added ceterms:DoctoralDegree

Reason:

en-US Refinement of description of degree credentials.

https://github.com/CredentialEngine/vocabularies/issues/265

ceterms:degreeMajor View Term History: JSON Turtle

Change:

dcterms:description: Added
en-US Where possible, values should be taken from published frameworks defining degree majors, minors, and concentrations such as the U.S. National Center for Education Statistics' (NCES) Classification of Instructional Programs (CIP).
rdfs:label: Added
en-US Degree Major
rdfs:domain: Added ceterms:BachelorDegree
rdfs:domain: Added ceterms:MasterDegree
rdfs:range: Added ceterms:CredentialAlignmentObject
rdfs:domain: Added ceterms:DoctoralDegree
rdfs:domain: Added ceterms:AssociateDegree
rdfs:domain: Added ceterms:Degree
rdfs:comment: Added
en-US The primary field of study of a degree-seeking student.

Reason:

en-US Refinement of description of degree credentials.

https://github.com/CredentialEngine/vocabularies/issues/265

ceterms:degreeMinor View Term History: JSON Turtle

Change:

rdfs:comment: Added
en-US An optional, secondary field of study of a degree-seeking student.
rdfs:domain: Added ceterms:BachelorDegree
rdfs:domain: Added ceterms:DoctoralDegree
dcterms:description: Added
en-US Where possible, values should be taken from published frameworks defining degree majors, minors, and concentrations such as the U.S. National Center for Education Statistics' (NCES) Classification of Instructional Programs (CIP).
rdfs:range: Added ceterms:CredentialAlignmentObject
rdfs:label: Added
en-US Degree Minor
rdfs:domain: Added ceterms:Degree
rdfs:domain: Added ceterms:MasterDegree
rdfs:domain: Added ceterms:AssociateDegree

Reason:

en-US Refinement of description of degree credentials.

https://github.com/CredentialEngine/vocabularies/issues/265

ceterms:department View Term History: JSON Turtle

Change:

vs:term_status: Added vs:stable
owl:equivalentProperty: Added schema:department
rdfs:subPropertyOf: Added ceterms:subOrganization
rdfs:domain: Added ceterms:CredentialOrganization
rdfs:range: Added ceterms:QACredentialOrganization
rdfs:comment: Added
en-US The organization being referenced is a department of the organization being described.
rdfs:label: Added
en-US Department
rdfs:domain: Added ceterms:QACredentialOrganization
rdfs:range: Added ceterms:CredentialOrganization

Reason:

en-US Enhancement

https://github.com/CredentialEngine/vocabularies/issues/293

ceterms:email View Term History: JSON Turtle

Change:

rdfs:domain: Removed ceterms:PostalAddress

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:entryCondition View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:AssessmentProfile
rdfs:range: Added ceterms:ConditionProfile
rdfs:domain: Added ceterms:LearningOpportunityProfile
rdfs:label: Added
en-US Entry Condition
rdfs:comment: Added
en-US The prerequisites for entry into the resource being described. Comment: Such requirements might include transcripts, previous experience, lower-level learning opportunities, etc.
dcterms:description: Added
en-US Such requirements might include transcripts, previous experience, lower-level learning opportunities, etc.
rdfs:subPropertyOf: Added ceterms:requires

Reason:

en-US Distinguishes "prerequisite" conditions from "requires" conditions necessary to earn a credential or complete a learning opportunity after entry.

https://github.com/CredentialEngine/vocabularies/issues/296

ceterms:exactAlignment View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:faxNumber View Term History: JSON Turtle

Change:

rdfs:domain: Removed ceterms:PostalAddress

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:identifierType View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:IdentifierValue
dcterms:description: Added
en-US Examples include ISBN and SSN.
rdfs:label: Added
en-US Identifier Type
rdfs:range: Added rdfs:Literal
rdfs:comment: Added
en-US Formal name or acronym of the identifier type.
vs:term_status: Added vs:stable

Reason:

en-US Enables a formal description of an identifier.

https://github.com/CredentialEngine/vocabularies/issues/159

ceterms:IdentifierValueSet View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Not needed.

https://github.com/CredentialEngine/vocabularies/issues/159

ceterms:isAdvancedStandingFor View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/292

ceterms:isPreparationFor View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/292

ceterms:isRequiredFor View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/292

ceterms:LearningOpportunity View Term History: JSON Turtle

Change:

dcterms:description: Added
en-US Types of learning opportunities such as a Courses class in other namespaces (e.g., schema.org/Course) may be declared as subclasses of ceterms:LearningOpportunity to support their discovery through applications processing CTDL data.

Reason:

en-US To encourage 3rd parties developing learning opportunities to declare them as a subclass of ceterms:LearningOpportunity.

https://github.com/CredentialEngine/vocabularies/issues/271

ceterms:learningOpportunityOffered View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Not needed.

https://github.com/CredentialEngine/vocabularies/issues/313

ceterms:learningResource View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Superseded by ceterms:targetLearningResource

ceterms:majorAlignment View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:minorAlignment View Term History: JSON Turtle

Change:

rdfs:subPropertyOf: Added ceterms:isSimilarTo

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:minorAlignment View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:narrowAlignment View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US

https://github.com/CredentialEngine/vocabularies/issues/304

ceterms:numberAwarded View Term History: JSON Turtle

Change:

owl:equivalentProperty: Removed schema:numberAwarded

Reason:

en-US This property was erroneously included.

https://github.com/CredentialEngine/vocabularies/issues/269

ceterms:object View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:LearningOpportunityProfile

Reason:

en-US Missing from range

https://github.com/CredentialEngine/vocabularies/issues/279

ceterms:partOfIdentifierValueSet View Term History: JSON Turtle

Change:

vs:term_status: Added vs:deprecated
vs:term_status: Removed vs:stable

Reason:

en-US Not needed.

https://github.com/CredentialEngine/vocabularies/issues/159

ceterms:preparationFrom View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:ConditionProfile

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/292

ceterms:recommends View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:CredentialAlignmentObject

Reason:

en-US Enhancement.

https://github.com/CredentialEngine/vocabularies/issues/188

ceterms:requires View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:CredentialAlignmentObject

Reason:

en-US Enhancement

https://github.com/CredentialEngine/vocabularies/issues/188

ceterms:socialMedia View Term History: JSON Turtle

Change:

rdfs:label: Added
en-US Social Media
rdfs:domain: Added ceterms:ContactPoint
rdfs:comment: Added
en-US A social media resource for the resource being described.
rdfs:domain: Added ceterms:CredentialOrganization
rdfs:domain: Added ceterms:QACredentialOrganization
rdfs:range: Added xsd:anyURI

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:subjectWebpage View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:Credential

Reason:

en-US Unintentionally missing.

https://github.com/CredentialEngine/vocabularies/issues/294

ceterms:submissionOf View Term History: JSON Turtle

Change:

rdfs:label: Added
en-US Submission Of
rdfs:comment: Added
en-US An artifact to be submitted.
dcterms:description: Added
en-US Example artifacts may include transcripts, portfolios, or an affidavit.
rdfs:domain: Added ceterms:ConditionProfile
rdfs:range: Added xsd:Literal

Reason:

en-US Helps identify required submissions (e.g., a transcript or a recommendation) as a part of requirements.

https://github.com/CredentialEngine/vocabularies/issues/295

ceterms:targetContactPoint View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:CredentialOrganization
rdfs:label: Added
en-US Target Contact Point
rdfs:comment: Added
en-US Options for contacting the resource being described.
rdfs:domain: Added ceterms:PostalAddress
rdfs:domain: Added ceterms:QACredentialOrganization

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:targetCredential View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:ConditionProfile

Reason:

en-US Missing from domain

https://github.com/CredentialEngine/vocabularies/issues/276

ceterms:targetCredential View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:VerificationServiceProfile

Reason:

en-US Clarification/enhancement

https://github.com/CredentialEngine/vocabularies/issues/300

ceterms:targetLearningOpportunity View Term History: JSON Turtle

Change:

rdfs:domain: Added ceterms:LearningOpportunityProfile

Reason:

en-US This domain was missing.

https://github.com/CredentialEngine/vocabularies/issues/270

ceterms:targetLearningOpportunity View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:LearningOpportunity

Reason:

en-US To mirror the usage of ceterms:targetAssessment

https://github.com/CredentialEngine/vocabularies/issues/270

ceterms:targetLearningResource View Term History: JSON Turtle

Change:

rdfs:range: Added ceterms:LearningResource
vann:usageNote: Added
en-US Examples include a textbook or lesson plan that describes or records the Educational Activity (e.g. an audio- or video-recording of a lesson).
rdfs:label: Added
en-US Target Learning Resource
rdfs:comment: Added
en-US A resource that is used as part of an Educational Activity.
rdfs:domain: Added ceterms:LearningOpportunityProfile

Reason:

en-US Supersedes ceterms:learningResource and helps prevent confusion between ceterms:learningResource and ceterms:LearningResource

https://github.com/CredentialEngine/vocabularies/issues/302

ceterms:telephone View Term History: JSON Turtle

Change:

rdfs:domain: Removed ceterms:PostalAddress

Reason:

en-US Refining handling of contact information

https://github.com/CredentialEngine/vocabularies/issues/307

ceterms:verificationMethodDescription View Term History: JSON Turtle

Change:

rdfs:comment: Added
en-US Description of the methods used to evaluate the resource validity and reliability.
rdfs:comment: Removed
en-US Description of the methods used to evaluate the validity and reliability.

Reason:

en-US Enhancement/Clarification of definition.

https://github.com/CredentialEngine/vocabularies/issues/301

ceterms:VerificationServiceProfile View Term History: JSON Turtle

Change:

dcterms:description: Added
en-US Includes, but is not limited to, verification of whether quality assurance credentials have been issued for organizations, learning opportunities, and assessments.
rdfs:comment: Added
en-US A resource describing the means by which someone can verify whether a credential has been attained.
rdfs:comment: Removed
en-US An resource describing the means by which someone can verify whether a credential has been attained by a person.