RDFa Core Initial Context
RDFa Core Initial Context
This list of predefined prefixes have been defined for RDFa as an
“initial context”
: essentially, RDFa users can use these prefixes without having the obligation of defining the prefixes in the HTML code. The same list of prefixes have also been defined for JSON-LD as a
JSON-LD Context
at the URI
; JSON-LD users can use the
@context
key with that URI as a shorthand to use the same prefixes.
Vocabulary Prefixes
Vocabulary Prefixes of W3C Documents (Recommendations or Notes)
Prefix
URI
Description
For more details see
Origin
as
Activity Vocabulary
Activity Vocabulary
W3C Recommendation
csvw
Metadata for Tabular Data
Metadata Vocabulary for Tabular Data
W3C Recommendation
dcat
Data Catalog Vocabulary
Data Catalog Vocabulary (DCAT)
W3C Recommendation
dqv
Data Quality Vocabulary
Data
on the Web Best Practices: Data Quality Vocabulary
W3C WG Note
duv
Dataset Usage Vocabulary
Dataset Usage Vocabulary
W3C WG Note
grddl
GRDDL
Gleaning Resource Descriptions from Dialects of Languages (GRDDL)
W3C Recommendation
jsonld
JSON-LD
JSON-LD 1.1, A JSON-based Serialization for Linked Data
W3C Recommendation
ldp
Linked Data Platform Vocabulary
Linked Data Platform 1.0
W3C Recommendation
ma
Ontology for Media Resources
Ontology for Media Resources 1.0
W3C Recommendation
oa
Web Annotation Vocabulary
Web Annotation Vocabulary
W3C Recommendation
odrl
ODRL Vocabulary & Expression 2.2
ODRL Vocabulary & Expression 2.2
W3C Recommendation
org
Organizations
The Organization Ontology
W3C Recommendation
owl
OWL
OWL Overview
W3C Recommendation
prov
Provenance Vocabulary
Provenance Ontology
W3C Recommendation
qb
Data Cubes
The RDF Data Cube Vocabulary
W3C Recommendation
rdf
RDF
RDF Semantics
W3C Recommendation
rdfa
RDFa Vocabulary
RDFa Core 1.1
W3C Recommendation
rdfs
RDF Schema
RDF Semantics
W3C Recommendation
rif
RIF
RIF Overview
W3C Recommendation
rr
R2RML
R2RML: RDB to RDF Mapping Language
W3C Recommendation
sd
SPARQL 1.1 Service Description
SPARQL 1.1 Service Description
W3C Recommendation
skos
SKOS Core
SKOS Simple Knowledge Organization System Reference
W3C Recommendation
skosxl
SKOS eXtension for Labels
SKOS Simple Knowledge Organization System Reference
W3C Recommendation
ssn
Semantic Sensor Network Ontology
Semantic Sensor Network Ontology
W3C Recommendation
sosa
Sensor, Observation, Sample, and Actuator Ontology
Semantic Sensor Network Ontology
W3C Recommendation
time
Time Ontology
Time Ontology in OWL
W3C Recommendation
void
VoID
Describing Linked Datasets with the VoID Vocabulary
W3C Interest Group Note
wdr
POWDER
Protocol for Web Description Resources (POWDER): Formal Semantics
W3C Recommendation
wdrs
POWDER-S
Protocol for Web Description Resources (POWDER): Formal Semantics
W3C Recommendation
xhv
RDFa Default Prefix
RDFa Core 1.1
W3C Recommendation
xml
XML Reserved Prefix
Namespaces in XML 1.0
W3C Recommendation
xsd
XML Schema Datatypes
XML Schema Part 2: Datatypes Second Edition
W3C Recommendation
Some vocabularies are currently in development at W3C and they
may
become W3C Recommendations or Notes, i.e., may become part of the table
above. It is therefore advisable to consider their prefixes reserved for
now. These are:
earl
for “http://www.w3.org/ns/earl#”, see
“Evaluation
and Report Language (EARL) 1.0 Guide”
Widely used Vocabulary prefixes based on the
vocabulary
usage on the Semantic Web
Prefix
URI
Description
For more details see
cc
ccREL
ccREL: The Creative Commons Rights Expression Language
ctag
Common Tag Ontology
Common Tag Specification
dc
Dublin Core Metadata Terms
DCMI Metadata Terms
dcterms
Dublin Core Metadata Terms
DCMI Metadata Terms
dc11
Dublin Core Metadata Element Set, Version 1.1
Dublin Core Metadata Element Set, Version 1.1
foaf
FOAF
FOAF Vocabulary Specification
gr
GoodRelations Ontology
GoodRelations Language Reference
ical
iCalendar terms in RDF
iCalendar terms in RDF
og
Facebook's Open Graph protocol
Open Graph Protocol
rev
RDF Review Vocabulary
RDF Review Vocabulary
sioc
SIOC Core Ontology
SIOC Core Ontology Specification
Google Rich Snippets' Vocabularies
Rich snippets (microdata, microformats, and RDFa)
vcard
vCard in RDF
Representing vCard Objects in RDF
schema
The Schema.org vocabulary
Full Schema.org documentation
Vocabulary Terms
Terms defined by W3C Documents
Term
URI
Description
For more details see
describedby
Refers to resource providing a description.
POWDER: Formal Semantics, Section 5, POWDER Processor Semantics
license
Refers to a license associated with this context.
IANA Link Relations
role
indicates the purpose of the resource. See the
XHTML Role Vocabulary
for roles in this vocabulary space
XHTML Role Attribute Module
Ivan
Herman
ivan@w3.org
W3C
Digital
Publishing Activity Lead
Updated:
2020-05-09
US