Attribute
A specific piece of information about a person, place, office, or organization entity. Attributes for a ‘person entity’ might include name, date of birth or religion, for example. 

Entity
A person, place, office, or organization extracted from the historical records. 

Floruit
A period of time when a person was most active. Used in place of known birth and death dates.

Knowledge Graph
A network graph which organizes data in terms of different entities or concepts and connects their attributes and relationships with meaningful links.

Linked Data
A Knowledge Graph that is available on the Web and interlinked with additional external Knowledge Graphs, also on the Web.

Ontology
A type of controlled vocabulary establishing a shared understanding of concepts, categories, and relationships within a subject area. 

Resource Description Framework (RDF)
A standard model for representing and linking structured information on the web, used by the Virtual Treasury to store knowledge graph data.

Schema: the framework for recording and organizing an entity’s attributes and relations. Each entity type has its own schema.

Structured data: data which conforms to a data model and has a well-defined structure.

Subgraph: a smaller grouping of information within the Knowledge Graph.

Triple: <Subject, Predicate, Object> – a statement used to construct the knowledge graph by defining attributes and relationships

• Subject – a thing, often an entity
• Predicate – defines the relationship between the subject and the object 
• Object – the entity or attribute related to the subject

Vocabulary: a formal standard for the entity types and relations. It is usually seen as a lightweight version of an ontology.