RDF-RDFS-RDFa-OWL-TTL-XML

Semantic web, linked datasets

Resources for semantic web

Good practises

Principles of linked open data

On the web
Machine Readable
Non-proprietary format
RSF standards
Linked RDF

Get an overview of the principles of Linked Data with "Linked Data: Evolving the Web into a Global Data Space" by Tom Heath and Christian Bizer

Syntax

RDF translator on appspot.com from about any language to about any other. See also easyrdf.org

Visualize RDF .

Download data of a certain negotiated format with `curl` command (Windows)

-L refers to the location
-H refers to the header
more info with curl --help

rdf/xml curl -o myFileName.xml -L -H "Accept: application/rdf+xml" myURI
json curl -o myFileName.json -L -H "Accept: application/json" myURI
turtle curl -o myFileName.ttl -L -H "Accept: text/turtle" myURI
html curl -o myFileName.html -L -H "Accept: text/html" myURI

Assign URI / Prefix URI

Use # separator for grouping, small coherent datasets, simple structures.
Use / separator for big datasets, modularity, to be more precise.
Read more about cool URIs on W3

Code/Decode a URL on meyerweb.com

Find namespace associated with prefix on prefix.cc

Common prefixes

Generals

prefix	URI	comment
owl	http://www.w3.org/2002/07/owl#	Web Ontology Language
rdfs	http://www.w3.org/2000/01/rdf-schema#	Resource Description Framework Schema
rdf	http://www.w3.org/1999/02/22-rdf-syntax-ns#	Resource Description Framework
rdfa	http://www.w3.org/ns/rdfa#	Resource Description Framework in Attributes
sh	http://www.w3.org/ns/shacl#	SHACL Shapes Constraints Language vocabulary
void	http://rdfs.org/ns/void#	Vocabulary of Interlinked Datasets
dcat	https://www.w3.org/ns/dcat#	Data CATalog vocabulary

Specialized

prefix	URI	comment
xsd	http://www.w3.org/2001/XMLSchema#	RDF compatible XSD types
foaf	http://xmlns.com/foaf/0.1/	Friend Of A Friend social vocabulary
rel	http://purl.org/vocab/relationship/	Relationship, extension of FOAF
skos	http://www.w3.org/2004/02/skos/core#	SKOS knowledge vocabulary
skosxl	http://www.w3.org/2008/05/skos-xl#	SKOS eXtenstion for Labels
dct (dcterms)	http://purl.org/dc/terms	Dublin Core Metadata Initiative : Metadata Terms
dc	http://purl.org/dc/elements/1.1/	DCMI : Metadata Elements
dctype	http://purl.org/dc/dcmitype/	DCMI Type vocabulary
prov	https://www.w3.org/ns/prov#	Provenance vocabulary
qb	http://purl.org/linked-data/cube#	Data Cube vocabulary
cc	http://creativecommons.org/ns#	Creative Common licenses
sawsdl	http://www.w3.org/ns/sawsdl#	Semantic Annotation for Web Services Description Language
ma	http://www.w3.org/ns/ma-ont#	Ontology for media resources

Datasets

prefix	URI	comment
db	http://dbpedia.org/	DBpedia data

Reference biblio on good practices

A pattern catalogue for modelling, publishing, and consuming Linked Data by Leigh Dodds and Ian Davis

Some Standards

Famous schemas

SKOS Simple Knowledge Organization System homepage has 4 classes and 28 properties in OWL
SKOS-XL SKOS eXtension for Labels homepage to transform labels into resources
Dublin Core Metadata Initiative to describe documents has 22 classes and 55 properties. Note that DC Elements is a subset of DC Terms. DC Type is a different vocabulary containing types of things that can be described using DC terms.
Creative Commons homepage to describe rights associated to a resource, has 6 main classes, 12 secondary classes and 11 properties
Friend Of A Friend specifications for social networkd, has 13 classes and 62 properties
Relationship is an extension of FOAF to describe relations between persons
Vocabulary of Interlinked Datasets to describe datasets and linksets
Data Catalog Vocabulary recommendation to describe any dataset, not only rdf

Software

W3C RDF/XML validator renders triples and graph from RDF/XML
Download standalone version of Corese from inria.fr for SPARQL queries and SHACL checks
Download Protégé from stanford.edu for ontology edition
Get simple RDFa samples on rdfa.info
W3C RDFa distiller and parser to get triples from html
Map a given vocabulary or append IRI = ...

comevussor/RDF-RDFS-RDFa-OWL-TTL-XML