Rdf Primer / quote 9 of 55

Properties, domains and ranges in RDF Schema

All properties in RDF are described as instances of class rdf:Property. [..] RDF Schema also provides vocabulary for describing how properties and classes are intended to be used together in RDF data. The most important information of this kind is supplied by using the RDF Schema properties rdfs:range and rdfs:domain to further describe application-specific properties.

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#properties #class #instances #kind #range

Related / other sources, sharing tags

Properties are like grammatical verbs

A property serves to define a relationship of a specific kind between two classes. The property is characterized by an intension, which is conveyed by a scope…

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The domain and range of a property

The domain is the class for which a property is formally defined. This means that instances of the property are applicable to instances of its domain class…

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Instance of a property

An instance of a property is a factual relation between an instance of the domain and an instance of the range of the property that matches the criteria of…

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Classes model types, not instances

Classes (also called "terms" in this guide) model types of objects or processes in the real world. Note that classes model types, not instances. For example…

An Introduction To Obo Ontologies #class #objects #real-world #instances #types

Instance of a class

An instance of a class is an item that has the traits that match the criteria of the intension of the class.

Cidoc-crm Version 4.2.4 - Reference Document #class #instances #criteria #intension #items #traits

Similar to class and instance

Similar to class and instance. Use case is a template of an event and user story is an occurrence.

Alistair.cockburn.us | Stop Confusing Use Cases And User Stories #cases #occurrence #events #instances #class