Term	Definition	Note
Classes
	Organization	A formal or informal group of people or entities working together for a common purpose, such as a company, university, or research group.
	Work	A creation or contribution of intellectual, artistic, or scientific nature, such as a paper, book, or software.
	Dataset	A collection of data, often structured and organized, used for analysis or research purposes.
	Expression	A particular form a work takes each time it is realized, often including specific edits, translations, or formats.
	JournalArticle	A scholarly article published in an academic journal, contributing new knowledge to a particular field of study.
	Preprint	A version of a scholarly article that precedes peer review and formal publication, usually shared publicly to facilitate feedback.
	Person	An individual human being, often used in academic and organizational contexts.
	Identifier	A unique reference used to distinguish a particular entity, such as a DOI for a publication or a ROR for a research organization.
	IdentifierScheme	A standardized system for creating identifiers, such as DOI or ROR, that ensures uniqueness and consistency.
	StatusInTime	A representation of the state or condition of an entity at a specific point in time, such as publication status.
	PublicationStatus	The state of a work in the publication process, including stages like being published in Gold Open Access, Green Open Access or Diamond Open Access.
	RoleInTime	A person’s role or responsibility at a particular point in time.
	Role	A defined function or responsibility, often in the context of a project or publication, such as “affiliate”.
	Repository	A storage location for digital or physical items, such as a data repository for datasets or a repository for publications.
	Concept	An abstract idea or a unit of meaning, often used in knowledge representation, such as a term in a classification system or ontology.
	ConceptScheme	A system or structure of concepts, such as a taxonomy, ontology, or controlled vocabulary, used to organize knowledge.
Object Properties
	hasIdentifier	An object property that links an entity to its unique identifier, such as a DOI or a ROR.
	usesIdentifierScheme	An object property indicating that an entity uses a specific identifier scheme, such as DOI or ROR.
	accessService	An object property referring to a service or platform that provides access to an entity, such as a repository.
	holdsRoleInTime	An object property that links an entity to a role it held at a specific point in time.
	withRole	An object property linking a role in time to a specific role it holds or has held.
	relatesToOrganization	An object property linking a role in time to an organization, such as affiliation with a research organization.
	isRelatedToRoleInTime	An object property indicating a relationship between an entity and a role in time held by another entity at a certain time.
	realization	An object property indicating that a work has been realized in a specific expression, such as a journal article or a preprint.
	holdsStatusInTime	An object property linking an entity to its status at a specific point in time.
	withStatus	An object property linking an entity to a particular status.
	inScheme	An object property indicating that an entity is part of a particular concept scheme, such as a taxonomy or classification system.
	relation	A general object property indicating a connection or relationship between two entities.
Data Properties
	name	A data property referring to the name of an entity, such as the name of a person or the name of an organization.
	hasLiteralvalue	A data property linking an identifier to a literal value, such as a string.
	title	A data property referring to the title of a work, such as the title of a journal article or dataset.
	prefLabel	A data property used to define a preferred label or term for an entity, often in controlled vocabularies.
	issued	A data property referring to the date when a work was issued or published, such as the publication date of a journal article.
Individuals
	doi	An individual representing a Digital Object Identifier, a unique identifier assigned to a digital object such as a journal article or dataset.
	ror	An individual representing a Research Organization Registry identifier, a unique identifier for research organizations.
	affiliate	An individual representing the role of a person being affiliated to an organization.
	gold-open-access	An individual representing the publication status of being published in Gold Open Access, so that the author pays to make a work freely available to the public.
	green-open-access	An individual representing the publication status of being published in Green Open Access, so that authors self-archive a work, making it available on a personal or institutional repository.
	diamond-open-access	An individual representing the publication status of being published in Diamond Open Access, so that works are published without any fees for authors or readers.