Semanlink - SPARQL

Parents:

Semantic Web

SPARQL

Backed by the flexibility of the RDF data model, and consisting of both a query language and data access protocol SPARQL has the potential to become a key component in Web 2.0 applications. SPARQL could provide a common query language for all Web 2.0 applications.

Related Tags:

52 Documents (Show All)

Showing distribution of Open University course topics with R and SPARQL « LinkedUp DevTalk
2013-05-08
- Open University
- R
SPARQL Query Mediation over RDF Data Sources with Disparate Contexts
2012-04-16
- Sem web: context
apassant.net » Easy “copy and paste” from the Web to LaTeX with SPARQL
sparqlTeX - a LaTeX class / python script to easily embed SPARQL results into TeX files. Using it, one can directly integrate data from SPARQL endpoints, from RDFa-enabled content (such as the previous talk pages), but also from any microformatted page (any Linkedin profile as they’re using hResume) into a LaTeX document. For the last one, I’m using any23 to convert such data into RDF (actually, any23 is used for any file-based query as it extracts RDF from HTML pages even if they’re not W3C-valid)
2012-02-23
- Alexandre Passant
- LaTeX
Displaying SPARQL results on a mobile phone - bobdc.blog
2011-10-05
- Bob DuCharme
- Téléphone portable
- XSLT
Revisiting Blank Nodes in RDF to Avoid the Semantic Mismatch with SPARQL
2011-01-15
- RDF blank nodes
SPARQL more than a query language! - Semantic Overflow
2010-12-27
- Semantic Overflow
- TopBraid/SPIN
SPARQL for SKOS integrity constraints
2010-12-16
- Constraints in the SW
- Pellet
- SKOS
- TopBraid/SPIN
ESWC2007_SPARQL_Tutorial.pdf
2010-12-15
- Andy Seaborne
- Axel Polleres
- Bijan Parsia
Semantics and Complexity of SPARQL
We identify a large class of SPARQL patterns, defined by imposing a simple and natural syntactic restriction, where the query evaluation problem can be solved more efficiently. This restriction gives rise to the class of well-designed patterns. We show that the evaluation problem is coNP-complete for well-designed patterns. Moreover, we provide several rewriting rules for well-designed patterns whose application may have a considerable impact in the cost of evaluating SPARQL queries.
2010-12-15
Empire: RDF & SPARQL Meet JPA | Semantic Universe
2010-07-06
- JPA
- RDF
RESTful SPARQL queries of RDFa - bobdc.blog
I can say "extract the RDF triples from the RDFa on that web page and then run this SPARQL query against it" all with a single URL.
2010-06-04
- Bob DuCharme
- RDFa
Composing the Semantic Web: Creating documents with SPARQL and JSP
2009-06-06
- JSP
SPARCool
SPARCool offers a way to run SPARQL queries about any URI that follows the Linked Data principles by calling a simple URL based on the http://sparcool.net/format/predicate[;l=lang]/URI pattern.
2009-04-21
- Alexandre Passant
- Linked Data
Querying Semantic Data from ISWC Wiki (USB Version) - SMWForum
2008-11-07
- Excel
danbri’s foaf stories » SPARQL results in spreadsheets
2008-11-07
- Dan Brickley
- Spreadsheets
Download SPARQL results directly into a spreadsheet - bobdc.blog
2008-10-30
- Bob DuCharme
- Spreadsheets
The SPARQL Service Interface
2008-10-12
- Dan Connolly
FAQ/CharacterEncoding - Tomcat Wiki
The fact is: there is no char encoding in a GET request. So an unmodified installation of Tomcat will parse the URI in a GET as ISO-8859-1 ("the Servlet spec requires it"). But a SPARQL request, for instance, requires it to be UTF-8 encoded. So it can't work!!!
Tomcat people insist that their behavior is a feature. Maybe it's not a bug, but I doubt it is a feature. To get tomcat working otherwise, you have to set a parameter in the server.xml (connector, URIEncoding) What if you don't control the tomcat install? Maybe the best thing to do is to parse the parameters from request.getQueryString(). In my web apps until now, I double UTF-8 encode the params in a GET (for instance, the semanlink bookmarklet)
2008-10-12
- FAQ
- Servlet
- Tomcat
- URI encoding
Berlin SPARQL Benchmark V2 - Results for Sesame, Virtuoso, Jena TDB, D2R Server, and MySQL
2008-09-24
- Benchmark
- Jena and database
Semantic Web by Example: Semantic CrunchBase - benjamin nowack's blog
2008-08-01
- Benjamin Nowack
SPARQLScript - Semantic Mashups made easy - benjamin nowack's blog
2008-07-17
- Benjamin Nowack
- Semantic mashups
SPARQL/Extensions/SPARQLScript - ESW Wiki
2008-06-12
- Nova Spivak
From RSS to SIOC using SPARQL : Alexandre Passant
2008-04-08
- Alexandre Passant
- RSS
- SIOC
SPARQL Reference Card
2008-04-08
- David Beckett
DanBriSlides - SPARQL-ing days
Notes from danbri talk, and motivation for SparqlPress
2008-02-17
- Dan Brickley
- SparqlPress
danbri’s foaf stories » Graph URIs in SPARQL: Using UUIDs as named views
2008-02-11
- Dan Brickley
wiki to dbpedia with sparql
SELECT ?subject ?p WHERE { { ?subject ?p http://en.wikipedia.org/wiki/Well-Tempered_Clavier } }
2008-02-01
- SPARQL: sample code
- Wikipedia page to concept
Lost Boy: Bee Node Deconstructed
"ADC pattern" (ASK, DESCRIBE, CONSTRUCT): a way to probe a remote data set to see if it has information that is of interest and then extract information from that data set with increasing levels of precision and control.
2008-02-01
- Leigh Dodds
TechnicaLee Speaking: Why SPARQL?
2008-01-25
- Lee Feigenbaum
- Semantic web: evangelization
Grawiki - A Wiki (and aggregator) for graph-shaped data - benjamin nowack's blog
Grawiki is a SPARQL-based Data Wiki, a little bit inspired by freebase, less impressive, feature-rich, scalable and all that, but, well, OpenSource, SemWeb-enabled, and decentralized (each Grawiki installation can import selected graphs from other ones, back-POSTing is in the works). As it seems that I forgot to write-protect the instance mentioned above, you can play with it if you like. You'll most probably encounter bugs, the built-in inferencer is still at alpha stage, and editing of consolidated bnodes is quite tricky to implement. I'll tweak things in a day or two. With Grawiki, I think I finally have (the start of) a tool that could work nicely for ad-hoc RDF editing and aggregation (it can import RDF and certain microformats). Oh, and a personal URI, and a FOAF file. At last ;-)
2008-01-25
- Benjamin Nowack
- To see
- Wiki
SparqlImplementations - ESW Wiki
2007-10-13
SPARQL Protocol for RDF
W3C Candidate Recommendation 6 April 2006
2007-10-13
- W3C Recommendation
SPARQLing AltaVista: the meaning of forms
The AltaVista engineers developed a clever mapping between html forms and SPARQL queries.
2007-08-23
- AltaVista
- Henry Story
- RDF forms
Restful semantic web services
2007-07-04
- Henry Story
- RDF forms
- Restful semantic web services
ESWC 2007 Tutorial: SPARQL - Where are we? Current state, theory and practice
2007-06-13
- ESWC 2007
- Tutorial
Linked Data at WWW2007: GRDDL, SPARQL, and Wikipedia, oh my!
2007-05-19
- Dan Connolly
- GRDDL
- Linked Data
RDF and SPARQL: Using Semantic Web Technology to Integrate the World's Data
Interesting write-up about relational database to RDF mapping on the W3C website
2007-04-19
- Database to RDF mapping
XMLArmyKnife -- SPARQL Query Service
2007-01-24
- Leigh Dodds
Online SPARQL Editor
2007-01-09
- Danny Ayers
Javascript SPARQL editor
sparql-editor - a simple, single-file HTML form/textarea/Javascript based SPARQL editor. Do what thou wilt (public domain). Only tested on Firefox.
2006-10-09
- Danny Ayers
- JavaScript
SPARQL Protocol and Query Language: Frequently AskedQuestions
2006-10-09
- FAQ
- Lee Feigenbaum
Lost Boy: Feeding Google Co-Op with SPARQL
Last night I took my first look at Google Co-op, in particular the "Subscribed Links" feature which allows users to add services to Google search results.
2006-06-08
- Google
- Leigh Dodds
XMLArmyKnife - Experimenting with EmbeddedRDF and GRDDL Support
Embedded RDF is a method of embedding (a subset of) RDF within XHTML and HTML documents. A simple XSLT transformation can be used to extract the RDF from within the document.
A related and more generalised technology is GRDDL which defines how to associate transformation algorithms (i.e. XSLT stylesheets) with XHTML profiles or microformats so that there's a clear mapping from embedded metadata into RDF.
I've been experimenting with adding support for both of these technologies in the XMLArmyKnife SPARQL query service. This provides a means to directly query RDF embedded in XHTML documents.
2006-05-28
- GRDDL
- Leigh Dodds
- Semantic markup in HTML
XTech 2006: SPARQLing Services
This paper will review the SPARQL specifications and its potential benefits to Web 2.0 applications. Focusing on the SPARQL protocol for RDF, the paper will provide implementation guidance for developers interested in adding SPARQL support to their applications.
2006-05-22
- Good
- Leigh Dodds
- Web Services
- XTech 2006
TechnicaLee Speaking: SPARQL Calendar Demo: A SPARQL JavaScript Library
2006-05-22
- JavaScript
- JSON
Lost Boy: XTech 2006: SPARQLing Services
An overview of SPARQL, with an emphasis on the SPARQL protocol and how SPARQL can benefit Web 2.0/AJAX applications.
2006-05-22
- Ajax
- JSON
- Leigh Dodds
- XTech 2006
Lost Boy: SPARQLing the BBC Programme Catalogue
2006-04-27
- BBC
- Leigh Dodds
SparqlCalendarDemo
This SPARQL Calendar Demo demonstrates the use of SPARQL queries over AJAX to integrate data from a myriad of native RDF and non-RDF sources. Currently, it finds calendar information from FOAF files, discovers shared interests between people, and suggests events that people with shared interests can attend together.
2006-03-24
- Ajax
XML.com: Introducing SPARQL: Querying the Semantic Web
2005-11-18
- Leigh Dodds
Quad store performance issues
2005-11-16
- RDF performance issues
- TripleStore
Plan B: Ajax and Sparql
2005-09-17
- Ajax
Semantic World and Cyberspace: SPARQL has some use - Kendall Clark
2005-09-17
- Ajax

Properties

rdf:type : sl:Tag
skos:prefLabel : SPARQL@fr