Resources Description Framework

Thu, 07 Jul 2022 10:12:49 GMT

Properties
Name Value
Identifier resources-description-framework
Name Resources Description Framework
Type Topic
Creation timestamp Thu, 07 Jul 2022 10:12:49 GMT
Modification timestamp Tue, 02 Aug 2022 11:35:20 GMT


RDF

  • It's a data model in which the basic unit of information is known as a triple
  • A triple consists of a subject, a predicate, and an object. You can also think of these as a resource identifier, an attribute or property name, and an attribute or property value
  • To remove any ambiguity from the information stated by a given triple, the triple's subject and predicate must be URIs (it's possible —and common— to use prefixed names in place of URIs)

Node Types

There are 3 different kinds of nodes that can exist in a RDF graph:

  • Resources: A concept that you want to describe. All resources must have a unique identifier.
  • Literals: These are values such as strings, numbers and dates
  • Blank nodes: A blank node is a resource without a unique identifier

In an RDF graph, nodes represent subject or object resources, and the predicates are the connections between those nodes.

URIs

All resources and predicates need to have a machine-readable unique identifier. A Uniform Resource Identifier (URI) is a string of characters that unambiguously identifies a particular resource. To guarantee uniformity, all URIs follow a predefined set of syntax rules.

Named Graphs

Pending

Building Knowledge Graphs

  1. Taxonomies
  2. Ontologies
  3. Content and data
  4. Graph database

Ecosystem

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