curling SPARQL
A quick reference.
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bobdc.blogBob DuCharme's weblog, mostly on technology for representing and linking information. |
February 24, 2019
January 20, 2019
Querying machine learning distributional semantics with SPARQL
Bringing together my two favorite kinds of semantics.
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December 23, 2018
Playing with wdtaxonomy
Those queries from my last blog entry? Never mind!
October 28, 2018
SPARQL full-text Wikipedia searching and Wikidata subclass inferencing
Wikipedia querying techniques inspired by a recent paper.
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August 27, 2018
Pipelining SPARQL queries in memory with the rdflib Python library
Using retrieved data to make more queries.
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July 22, 2018
Dividing and conquering SPARQL endpoint retrieval
With the VALUES keyword.
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June 17, 2018
Running and querying my own Wikibase instance
Querying it, of course, with SPARQL.
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May 28, 2018
RDF* and SPARQL*
Reification can be pretty cool.
January 28, 2018
JavaScript SPARQL
With rdfstore-js.
December 31, 2017
SPARQL and Amazon Web Service's Neptune database
Promising news for large-scale RDF development.
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November 19, 2017
SPARQL queries of Beatles recording sessions
Who played what when?
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July 30, 2017
The W3C standard constraint language for RDF: SHACL
A brief history of the new standard and some toys to play with it.
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June 25, 2017
Creating Wide CSV files with SPARQL
Lots of columns and commas, but all in the right place.
May 29, 2017
Instead of writing SPARQL queries for Wikipedia--query for them!
Queries as data to help you get at more data.
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April 23, 2017
The Wikidata data model and your SPARQL queries
Reference works to get you taking advantage of the fancy parts quickly.
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March 26, 2017
Wikidata's excellent sample SPARQL queries
Learning about the data, its structure, and more.
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February 26, 2017
Getting to know Wikidata
First (SPARQL-oriented) steps.
January 22, 2017
Brand-name companies using SPARQL: the sparql.club
Disney! Apple! Amazon! MasterCard!
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July 31, 2016
SPARQL in a Jupyter (a.k.a. IPython) notebook
With just a bit of Python to frame it all.
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June 12, 2016
Emoji SPARQL😝!
If emojis have Unicode code points, then we can...
May 17, 2016
Trying out Blazegraph
Especially inferencing.
August 22, 2015
Querying machine learning movie ratings data with SPARQL
Well, movie ratings data popular with machine learning people.
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July 15, 2015
Visualizing DBpedia geographic data
With some help from SPARQL.
November 9, 2014
Querying aggregated Walmart and BestBuy data with SPARQL
From structured data in their web pages!
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October 6, 2014
Dropping OPTIONAL blocks from SPARQL CONSTRUCT queries
And retrieving those triples much, much faster.
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August 24, 2014
Exploring a SPARQL endpoint
In this case, semanticweb.org.
June 10, 2014
Integrating hiphop vocabulary scores with other relevant data—then querying it
With a little JSON + DBpedia integration.
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May 9, 2014
"Experience in SPARQL a plus"
The long tail story of SPARQL success: appearances in job postings.
April 21, 2014
RDF lists and SPARQL
Not great, but not terrible, and a bit better with SPARQL 1.1
March 8, 2014
Easier querying of strings with RDF 1.1
In which a spoonful of syntactic sugar makes the string querying go down a bit easier.
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February 9, 2014
Querying my own MP3, image, and other file metadata with SPARQL
And a standard part of Ubuntu.
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January 7, 2014
Storing and querying RDF in Neo4j
Hands-on experience with another NoSQL database manager.
December 4, 2013
Storing (and querying) RDF in NoSQL database managers
Interesting progress, carefully measured.
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November 9, 2013
Using SPARQL queries from native Android apps
With a free, kid-friendly development kit.
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September 22, 2013
Making charts out of SPARQL query results with sgvizler
Embed a query in your HTML, name an endpoint, and pick a chart type.
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July 1, 2013
Using VALUES to map values in a SPARQL query
The VALUES keyword: even better than I thought.
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June 2, 2013
Coming soon: new, expanded edition of "Learning SPARQL"
55% more pages! 23% fewer mentions of the semantic web!
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February 15, 2013
"RDF and SPARQL" article published in "Big Data" journal
Or: RDF, SPARQL, and Big Data, part 3.
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January 13, 2013
Finding Europeana audio with SPARQL
December 5, 2012
Normalizing company names with SPARQL and DBpedia
Wikipedia page redirection data, waiting for you to query it.
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October 24, 2012
SPARQL and Big Data (and NoSQL)
How to pursue the common ground?
September 29, 2012
SPARQL 1.1's new VALUES keyword
New ways to filter search results.
June 26, 2012
Reclaiming my picture metadata from flickr
Surprise: by converting multiple sources of data to triples and then running a SPARQL query.
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June 3, 2012
Trying out SPARQL 1.1's COPY and MOVE operations
Copying and moving triples between graphs, named or otherwise.
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March 31, 2012
Playing with SPARQL Graph Store HTTP Protocol
GETting, POSTing, PUTting, and DELETEing named graphs.
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October 4, 2011
Displaying SPARQL results on a mobile phone
July 27, 2011
"Learning SPARQL" now available
In print and ebook formats.
June 1, 2011
My upcoming O'Reilly book: "Learning SPARQL"
Querying and Updating with SPARQL 1.1.
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May 17, 2011
Using SPARQL to find the right DBpedia URI
Even with the wrong name.
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April 27, 2011
Inserting data from a SPARQL endpoint into a relational database
April 20, 2011
Form-driven SPARQL queries without scripting
Just two lines in an .htaccess file.
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February 22, 2011
Pulling SKOS prefLabel and altLabel values out of DBpedia
Or, using linked data to build a standards-compliant thesaurus with SPARQL.
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October 15, 2010
Playing more with SPARQL 1.1 property paths
Some fun new features.
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September 22, 2010
Fallback with SPARQL
"Use this term if available, else fall back to that one".
August 18, 2010
Trying SPARQL 1.1 new query features with ARQ
Just about all there.
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June 3, 2010
RESTful SPARQL queries of RDFa
No local parsing or querying software needed.
March 1, 2010
Is SPIN the Schematron of RDF?
Represent business rules using an implemented standard, then flagging violations in a machine-readable way.
January 21, 2010
Using the ARQ SPARQL processor from the command line
With the Jena extensions.
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January 4, 2010
Federated SPARQL queries
Using a Jena extension.
October 14, 2009
Blogging on TopQuadrant's Blog
In addition to here.
October 1, 2009
A rules language for RDF
Right under our noses.
September 9, 2009
Appreciating SPARQL CONSTRUCT more
Another way to get more out of your data.
August 27, 2009
Getting started with the TopQuadrant product line
A lot of great technology to learn about.
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July 22, 2009
New developerWorks article: "Build Wikipedia query forms with semantic technology"
Build form-driven apps that let any user query DBpedia.
May 22, 2009
Writing about the Semantic Web
And Linked Data, and RDF, and RDFa, and SPARQL, and OWL, and...
April 8, 2009
Getting started with AllegroGraph
Via Python and via HTTP.
March 19, 2009
Getting started with Open Anzo
Don't miss the exciting command line video demo!
March 15, 2009
Some use cases to implement using SPARQL graphs
Or not; I'm open to suggestions.
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March 10, 2009
Querying a set of named RDF graphs without naming the graphs
A big step toward using named graphs to track provenance.
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March 1, 2009
Some questions about RDF named graphs
Trying to connect the data structure to real-world use.
January 8, 2009
Hey CNN, SPARQL isn't so difficult.
And like any programming language, it doesn't have to be convoluted.
December 26, 2008
A belated Christmas wish: a SPARQL endpoint for Digg RDF
Or consider it a lazy semweb wish.
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December 22, 2008
Adding metadata value with Pellet
A nice new feature of Pellet 2.0.
December 1, 2008
SPARQL and live relational data
A little demo.
November 18, 2008
Linking information to "missing" information in SPARQL
Or, as the SQL people call it, doing outer joins.
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November 7, 2008
SPARQL at the movies
Using SPARQL to answer a few questions that IMDB won't help much with.
October 29, 2008
Download SPARQL results directly into a spreadsheet
And then sort it, graph it, create new calculations... do all that stuff people do with spreadsheets.
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October 20, 2008
SPARQL and relational databases: getting started
Asking about tables and columns and doing a simple join.
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October 10, 2008
Learning more about SPARQL
Improving the Bart blackboard query.
September 30, 2008
Querying wiki/dbpedia for presidents' ages at inauguration
Easier than Jon Udell had thought.
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September 23, 2008
Querying aggregated XBRL reports with SPARQL
Easier than I though it would be.
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August 15, 2008
How you can explore a new set of linked data
Some great tips from Dean Allemang.
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November 9, 2007
Querying DBpedia
And looking forward to more.
July 6, 2007
Semantic Web project ideas number 6
A form-driven front end to a SPARQL engine (as opposed to a SPARQL front end).