Il Resource Description Framework (RDF) è lo strumento base proposto da W3C per la codifica, lo scambio e il riutilizzo di metadati strutturati e consente l'interoperabilità semantica tra applicazioni che condividono le informazioni sul Web. È costituito da due componenti: . RDF Model and Syntax: espone la struttura del modello RDF, e descrive una possibile sintassi.

Resource Description and Access (RDA) is a standard for descriptive cataloging initially released in June 2010, providing instructions and guidelines on formulating bibliographic data.Intended for use by libraries and other cultural organizations such as museums and archives, RDA is the successor to Anglo-American Cataloguing Rules, Second Edition (AACR2).

RDF Schema (Resource Description Framework Schema, variously abbreviated as RDFS, RDF(S), RDF-S, or RDF/S) is a set of classes with certain properties using the RDF extensible knowledge representation data model, providing basic elements for the description of ontologies.It uses various forms of RDF vocabularies, intended to structure RDF resources. ...