semantic web and coldfusion
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The Semantic Web and Coldfusion
William Greenly29th July 2010
Introduction
New technology
New revenue stream
That thing 10 years ago was the Semantic Web and somewhere between now and then it got lost
Principles and fundamentals
URI's and Triples
RDF/XML, OWL/XML, RDFa, SPARQL
Protocols
URI's / Triples
Identifiers for things e.g:http://dbpedia.org/resource/Boston
mailto:[email protected]
mid:1276004540.10196.1.camel@waldron
Triple consists of a subject, predicate and object e.g:Will knows Tim
RDF/XML
RDF has an XML representation
This can be resolved as triples
OWL/XML
Web Ontology Language / has an XML representation
Essentially a set of axioms that can be used to create vocabularies of terms to describe data
Also used for reasoning over data
RDFa
Means to embed RDF in an HTML web page
Typically parsed and stored as triples
SPARQL
Query language for RDF
Designed for querying distributed data
Sophisticated and feature rich
Protocols
SPARQL Protocol
Interface for triplestores (databases) over the web
Based on HTTP
Use Case 1
HTML+RDFaSPARQLEndpointApplicationApplicationApplicationDataDataDataTriplestore
Nutch/SolrRDFa Parser
Use Case 2
HTML+RDFaSPARQLEndpointApplicationApplicationApplicationTriplestore
Nutch/SolrRDFa Parser
Basic Techniques
Jena
CFQUERY
CF_RDF
CF_OWL
CFQUERY
CF_RDF / CF_OWL
Advanced Techniques
Binding to an RDF Model
Hibernate
PropertyEventListenersJava Beans
JCR
AnnotationsJPA Empire
Groovy/Grails plugins
Implicit getters and setters for , but no listeners
ColdFusion ORM supports listeners/event handlers for CRUD operations
But SPARQL cannot be treated as a SQL/Hibernate dialect
JPA - Empire
Groovy/Grails plugins
Further Reading
Semantic Web Standards:http://www.w3.org/standards/semanticweb/
Communityhttp://semanticweb.org/
Semantic Web Programminghttp://amzn.com/047041801X
Development Tools
Jenahttp://jena.sourceforge.net/
sparql4jdbc driver:http://code.google.com/p/jdbc4sparql/
CF_RDF/CF_OWLhttp://code.google.com/p/cfsemantics/
Empirehttp://github.com/clarkparsia/Empire
RDFa Grails Pluginhttp://www.grails.org/plugin/rdfa
Recommended Triplestores
Garlikhttp://www.4store.org/
Intellidimensionhttp://www.intellidimension.com/
Common Vocabularies
E-Commercehttp://purl.org/goodrelations/v1
People, Businesses, Placeshttp://www.w3.org/2001/vcard-rdf/3.0#
http://xmlns.com/foaf/0.1/
Dublin Corehttp://purl.org/dc/elements/1.1/