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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!

Continue reading "Coming soon: new, expanded edition of "Learning SPARQL"" »

Posted by Bob DuCharme at 7:44 PM |

February 15, 2013

"RDF and SPARQL" article published in "Big Data" journal

Or: RDF, SPARQL, and Big Data, part 3.

Continue reading ""RDF and SPARQL" article published in "Big Data" journal" »

Posted by Bob DuCharme at 8:53 AM |

January 13, 2013

Finding Europeana audio with SPARQL

And video!

Continue reading "Finding Europeana audio with SPARQL" »

Posted by Bob DuCharme at 11:06 AM |

December 5, 2012

Normalizing company names with SPARQL and DBpedia

Wikipedia page redirection data, waiting for you to query it.

Continue reading "Normalizing company names with SPARQL and DBpedia" »

Posted by Bob DuCharme at 7:46 AM |

October 24, 2012

SPARQL and Big Data (and NoSQL)

How to pursue the common ground?

Continue reading "SPARQL and Big Data (and NoSQL)" »

Posted by Bob DuCharme at 10:15 PM |

September 29, 2012

SPARQL 1.1's new VALUES keyword

New ways to filter search results.

Continue reading "SPARQL 1.1's new VALUES keyword" »

Posted by Bob DuCharme at 4:42 PM |

June 26, 2012

Reclaiming my picture metadata from flickr

Surprise: by converting multiple sources of data to triples and then running a SPARQL query.

Continue reading "Reclaiming my picture metadata from flickr" »

Posted by Bob DuCharme at 7:54 PM |

June 3, 2012

Trying out SPARQL 1.1's COPY and MOVE operations

Copying and moving triples between graphs, named or otherwise.

Continue reading "Trying out SPARQL 1.1's COPY and MOVE operations" »

Posted by Bob DuCharme at 11:13 AM |

March 31, 2012

Playing with SPARQL Graph Store HTTP Protocol

GETting, POSTing, PUTting, and DELETEing named graphs.

Continue reading "Playing with SPARQL Graph Store HTTP Protocol" »

Posted by Bob DuCharme at 10:16 AM |

October 4, 2011

Displaying SPARQL results on a mobile phone

Nicely.

Continue reading "Displaying SPARQL results on a mobile phone" »

Posted by Bob DuCharme at 9:31 AM |

July 27, 2011

"Learning SPARQL" now available

In print and ebook formats.

Continue reading ""Learning SPARQL" now available" »

Posted by Bob DuCharme at 8:12 AM |

June 1, 2011

My upcoming O'Reilly book: "Learning SPARQL"

Querying and Updating with SPARQL 1.1.

Continue reading "My upcoming O'Reilly book: "Learning SPARQL"" »

Posted by Bob DuCharme at 10:07 AM |

May 17, 2011

Using SPARQL to find the right DBpedia URI

Even with the wrong name.

Continue reading "Using SPARQL to find the right DBpedia URI" »

Posted by Bob DuCharme at 8:40 AM |

April 27, 2011

Inserting data from a SPARQL endpoint into a relational database

Via XML.

Continue reading "Inserting data from a SPARQL endpoint into a relational database" »

Posted by Bob DuCharme at 9:28 AM |

April 20, 2011

Form-driven SPARQL queries without scripting

Just two lines in an .htaccess file.

Continue reading "Form-driven SPARQL queries without scripting" »

Posted by Bob DuCharme at 8:39 AM | | Comments (5)

February 22, 2011

Pulling SKOS prefLabel and altLabel values out of DBpedia

Or, using linked data to build a standards-compliant thesaurus with SPARQL.

Continue reading "Pulling SKOS prefLabel and altLabel values out of DBpedia" »

Posted by Bob DuCharme at 9:12 AM | | Comments (2)

October 15, 2010

Playing more with SPARQL 1.1 property paths

Some fun new features.

Continue reading "Playing more with SPARQL 1.1 property paths" »

Posted by Bob DuCharme at 8:58 AM | | Comments (4)

September 22, 2010

Fallback with SPARQL

"Use this term if available, else fall back to that one".

Continue reading "Fallback with SPARQL" »

Posted by Bob DuCharme at 9:09 AM | | Comments (8)

August 18, 2010

Trying SPARQL 1.1 new query features with ARQ

Just about all there.

Continue reading "Trying SPARQL 1.1 new query features with ARQ" »

Posted by Bob DuCharme at 9:27 AM |

June 3, 2010

RESTful SPARQL queries of RDFa

No local parsing or querying software needed.

Continue reading "RESTful SPARQL queries of RDFa" »

Posted by Bob DuCharme at 10:02 AM | | Comments (5)

March 1, 2010

Is SPIN the Schematron of RDF?

Represent business rules using an implemented standard, then flagging violations in a machine-readable way.

Continue reading "Is SPIN the Schematron of RDF?" »

Posted by Bob DuCharme at 6:56 PM |

January 21, 2010

Using the ARQ SPARQL processor from the command line

With the Jena extensions.

Continue reading "Using the ARQ SPARQL processor from the command line" »

Posted by Bob DuCharme at 10:38 AM |

January 4, 2010

Federated SPARQL queries

Using a Jena extension.

Continue reading "Federated SPARQL queries" »

Posted by Bob DuCharme at 1:07 PM | | Comments (3)

October 14, 2009

Blogging on TopQuadrant's Blog

In addition to here.

Continue reading "Blogging on TopQuadrant's Blog" »

Posted by Bob DuCharme at 7:59 PM | | Comments (1)

October 1, 2009

A rules language for RDF

Right under our noses.

Continue reading "A rules language for RDF" »

Posted by Bob DuCharme at 12:45 PM | | Comments (6)

September 9, 2009

Appreciating SPARQL CONSTRUCT more

Another way to get more out of your data.

Continue reading "Appreciating SPARQL CONSTRUCT more" »

Posted by Bob DuCharme at 7:33 PM | | Comments (4)

August 27, 2009

Getting started with the TopQuadrant product line

A lot of great technology to learn about.

Continue reading "Getting started with the TopQuadrant product line" »

Posted by Bob DuCharme at 8:38 PM | | TrackBacks (1)

July 22, 2009

New developerWorks article: "Build Wikipedia query forms with semantic technology"

Build form-driven apps that let any user query DBpedia.

Continue reading "New developerWorks article: "Build Wikipedia query forms with semantic technology"" »

Posted by Bob DuCharme at 10:07 AM |

May 22, 2009

Writing about the Semantic Web

And Linked Data, and RDF, and RDFa, and SPARQL, and OWL, and...

Continue reading "Writing about the Semantic Web" »

Posted by Bob DuCharme at 9:51 AM | | Comments (5)

April 8, 2009

Getting started with AllegroGraph

Via Python and via HTTP.

Continue reading "Getting started with AllegroGraph" »

Posted by Bob DuCharme at 4:50 PM | | Comments (4)

March 19, 2009

Getting started with Open Anzo

Don't miss the exciting command line video demo!

Continue reading "Getting started with Open Anzo" »

Posted by Bob DuCharme at 7:55 PM | | Comments (1)

March 15, 2009

Some use cases to implement using SPARQL graphs

Or not; I'm open to suggestions.

Continue reading "Some use cases to implement using SPARQL graphs" »

Posted by Bob DuCharme at 5:34 PM | | Comments (4)

March 10, 2009

Querying a set of named RDF graphs without naming the graphs

A big step toward using named graphs to track provenance.

Continue reading "Querying a set of named RDF graphs without naming the graphs" »

Posted by Bob DuCharme at 8:01 PM | | Comments (7)

March 1, 2009

Some questions about RDF named graphs

Trying to connect the data structure to real-world use.

Continue reading "Some questions about RDF named graphs" »

Posted by Bob DuCharme at 11:17 AM | | Comments (6) | TrackBacks (1)

January 8, 2009

Hey CNN, SPARQL isn't so difficult.

And like any programming language, it doesn't have to be convoluted.

Continue reading "Hey CNN, SPARQL isn't so difficult." »

Posted by Bob DuCharme at 9:19 AM | | Comments (2) | TrackBacks (1)

December 26, 2008

A belated Christmas wish: a SPARQL endpoint for Digg RDF

Or consider it a lazy semweb wish.

Continue reading "A belated Christmas wish: a SPARQL endpoint for Digg RDF" »

Posted by Bob DuCharme at 2:47 PM | | Comments (2)

December 22, 2008

Adding metadata value with Pellet

A nice new feature of Pellet 2.0.

Continue reading "Adding metadata value with Pellet" »

Posted by Bob DuCharme at 9:37 AM | | Comments (1)

December 1, 2008

SPARQL and live relational data

A little demo.

Continue reading "SPARQL and live relational data" »

Posted by Bob DuCharme at 5:19 PM | | Comments (2)

November 18, 2008

Linking information to "missing" information in SPARQL

Or, as the SQL people call it, doing outer joins.

Continue reading "Linking information to "missing" information in SPARQL" »

Posted by Bob DuCharme at 9:07 PM | | Comments (5)

November 7, 2008

SPARQL at the movies

Using SPARQL to answer a few questions that IMDB won't help much with.

Continue reading "SPARQL at the movies" »

Posted by Bob DuCharme at 9:12 AM | | Comments (6)

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.

Continue reading "Download SPARQL results directly into a spreadsheet" »

Posted by Bob DuCharme at 9:02 AM | | Comments (1)

October 20, 2008

SPARQL and relational databases: getting started

Asking about tables and columns and doing a simple join.

Continue reading "SPARQL and relational databases: getting started" »

Posted by Bob DuCharme at 5:24 PM | | Comments (4)

October 10, 2008

Learning more about SPARQL

Improving the Bart blackboard query.

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Posted by Bob DuCharme at 7:38 AM | | Comments (3)

September 30, 2008

Querying wiki/dbpedia for presidents' ages at inauguration

Easier than Jon Udell had thought.

Continue reading "Querying wiki/dbpedia for presidents' ages at inauguration" »

Posted by Bob DuCharme at 9:10 AM | | Comments (5)

September 23, 2008

Querying aggregated XBRL reports with SPARQL

Easier than I though it would be.

Continue reading "Querying aggregated XBRL reports with SPARQL" »

Posted by Bob DuCharme at 9:15 AM | | Comments (3)

August 15, 2008

How you can explore a new set of linked data

Some great tips from Dean Allemang.

Continue reading "How you can explore a new set of linked data" »

Posted by Bob DuCharme at 9:50 AM | | Comments (3)

November 9, 2007

Querying DBpedia

And looking forward to more.

Continue reading "Querying DBpedia" »

Posted by Bob DuCharme at 9:53 AM | | Comments (3)

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).

Continue reading "Semantic Web project ideas number 6" »

Posted by Bob DuCharme at 9:27 AM | | Comments (3)