Linked Data Basic Resources

Bibliographic Metadata Elements

There are a number of existing element sets for bibliographic data. Some come out of library cataloging concepts, others have been developed from an academic research perspective and favor print materials, primarily journal articles.

Bibliographic Ontology (BIBO)
Citation Typing Ontology (CiTO) [part of SPAR] An ontology for citations
FRBR-Aligned Bibliographic Ontology (FABiO) Description of bibliographic resources using FRBR principles
Dublin Core Metadata Elements
RDA Vocabularies and Elements
British Library Terms in RDF
British National Bibliography (diagram, PDF)
FRBR (FRBRer)
ISBD
FRAD
MADS in RDF
BIBFRAME (Library of Congress)
BIBFRAME (Zepheira)

Some Useful Ontologies

Friend of a Friend (FOAF) (Foaf-o-matic) FOAF is a social ontology for people and their information such as contact information, email, and connections to other people. Foaf-o-matic is an easy way to create a FOAF profile.
BIO (Biographical information) and various vocabularies at Vocab.org
schema.org (Microformat ontology for marking up web pages)
DBPedia Ontology This ontology mirrors the data carried in Wikipedia
Event Ontology Allows you code the date, time, and place of an event

Some Useful Vocabularies

Note: these are controlled lists of terms that can be used as values ("objects") in linked data. The lists included here only ones with http URIs for each term. There are many standard lists of terms that have not yet been expressed as URIs, such as many ISO lists.

Geonames Geographic Data
BBC Wildlife vocabulary
Library of Congress Vocabularies (LCSH, subject authorities, classification, others)
FAST in RDF
RDA Vocabularies and Elements
Dewey Decimal System in RDF (discontinued. Was http://dewey.info)
Rameau subject headings Subject headings from the National Library of France
Deutsche national Bibliothek subjects Subject headings from the National Library of Germany
AGROVOC (FAO thesaurus)

Tutorials

Linked Data tutorial, by Bizer, Cyganiak and Heath
Euclid Project Tutorial
SPARQL by Example
Karen Coyle's Tutorial on Metadata and Semantic Web (in progress)

Databases and Catalogs using Linked Data

These are databases and catalogs that are searchable through a user interface whose data is stored as linked data. The amount of linking varies, and may change over time as these systems and the available resources grow.

OpenAgris, Food and Agriculture Organization
LIBRIS, National Library of Sweden
Open Library
Freebase(Note: "closed Aug 31 2016. This page provides access to the last available data dump")
Geonames
Biblioteca Nacional de Espana

Data Sets

These are bulk data sets that have been made available for download. They can be used for experimentation, or to feed into other data projects.

The Data Hub (includes BNB, LIBRIS, and other bibliographic datasets) (The Data Hub is a UK non-profit dedicated to open knowledge. It makes its site available as a place to list open data sets of any type, so look for the "RDF" button to find linked data.)