Richard Cyganiak (@cygri) header
Richard Cyganiak (@cygri) profile picture

Richard Cyganiak

@cygri

Data. Standards. SPARQL. TopQuadrant.

 Sligo, Ireland
Joined August 2007
  • Tweets3.5K
  • Following205
  • Followers2.7K
17Media
Photo by Richard Cyganiak (@cygri)Photo by Richard Cyganiak (@cygri)Photo by Richard Cyganiak (@cygri)
Minor prefix.cc update: Namespace URIs ending with underscores “_” are now allowed.
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Richard Cyganiak retweeted
Bob DuCharme (@bobdc) profile picture
Bob DuCharme@bobdc21 Jun 2020
New blog entry: Converting CSV to RDF with Tarql — quick and easy and, if you like, streaming. bobdc.com/blog/tarql/ (Thanks, @cygri and Boris P!)
Converting CSV to RDF with Tarql

Converting CSV to RDF with Tarql

Quick and easy and, if you like, streaming.

bobdc.com
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Tiny prefix.cc update: URIs longer than 100 characters now are rejected with a helpful error message. Previously they were silently truncated. Happened twice in 10 years, according to the logs. First time it was ignored, second time a bug was reported—thanks @olea!
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prefix.cc tweak: We now allow namespace URIs ending in underscores.
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Richard Cyganiak retweeted
Samu Lang (@langsamu) profile picture
Samu Lang@langsamu29 Jun 2019
I've created a #SHACL processor langsamu.net/shacl for dotNetRDF github.com/dotnetrdf/dotnetr…. Fully compliant with SHACL Core and SHACL-SPARQL github.com/langsamu/SHACL-do…. Feedback most welcome.
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Someone asked on StackOverflow why it makes sense to put the creation date in the namespace URI of a vocabulary, as seen in rdf:, rdfs:, xsd: and many other vocabularies. My answer: It doesn't. stackoverflow.com/a/56500519…
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A a questionnaire understanding the varying perspectives that exist within the Semantic Web gente :) Created by Aidan Hogan docs.google.com/forms/d/e/1F…
Semantic Web: Perspectives

Semantic Web: Perspectives

The following questionnaire aims to understand the community's perspectives regarding the current state of deployment of the Semantic Web, and some of the potential challenges faced. Each question is...

docs.google.com
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Richard Cyganiak retweeted
Adrian Gschwend (@linkedktk) profile picture
Adrian Gschwend@linkedktk13 May 2019
My colleague @_vhf is playing around with VS Code & our rdf-vocabularies package. Completion only to stuff that exists in RDF vocabularies & ontologies
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Favourite part: “Asked about the major challenges to standardizing vocabularies - her first answer was basically ‘egos’.”
Denny Vrandečić (@vrandezo) profile pictureDenny Vrandečić@vrandezo9 May 2019
My trip report on the first day of the Knowledge Graph Conference @KnowledgeGraph2 #kgc2019 simia.net/wiki/Knowledge_Gra…
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SPARQL/Turtle style poll: Do you put a space before a statement-ending semicolon, and why?
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Richard Cyganiak retweeted
Adrian Gschwend (@linkedktk) profile picture
Adrian Gschwend@linkedktk8 May 2019
Announcing RDF Vocabulary, a list of what we @zazukocom define as common prefixes & vocabularies. Bonus: You can get a RDFJS Dataset back containing triples of this vocab! Great if you want to do auto-complete for example. github.com/zazuko/rdf-vocabu…
Image from Adrian Gschwend (@linkedktk)
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Tarql 1.2 released! Tarql is a scalable CSV-to-RDF mapper with SPARQL syntax. This is a maintenance release with library upgrades, bug fixes, and minor new features. github.com/tarql/tarql/relea…
Release v1.2 · tarql/tarql

Release v1.2 · tarql/tarql

Various minor new features, improvements and bugfixes. --dedup n removes duplicate triples in a window of size n --write-base adds @base to Turtle output Ignore cells containing only whitespace Im...

github.com
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I can't speak for the designers of RDF* but I assume it's the desire to use the same syntax in SPARQL*. In SPARQL, curly braces were already taken for group graph patterns. Double pointy brackets were the next-best choice.
Tim Lebo (@timrdf) profile pictureTim Lebo@timrdf28 Apr 2019
Why <<> <> <>> and not {<> <> <>} to state the components of the reified triple? Latter seems to be more in line with trig and sparql.
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I don't love the RDF*/SPARQL* syntax but it's hard to see a good alternative. Perhaps I would have preferred "s1 p1 o1 <<p2 o2>>" over "<<s1 p1 o1>> p2 o2". Put the special thing (the annotation) into the special syntax, not the normal thing (the annotated triple).
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Richard Cyganiak retweeted
Olaf Hartig (@olafhartig) profile picture
Olaf Hartig@olafhartig28 Apr 2019
Replying to @cygri
RDF*/SPARQL* will soon have wider support. For instance, the Neptune folks are committed to add it. Corese by @wimmics is going to have it soon. Others will follow ;-)
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Q on StackOverflow: Can RDF express edge properties like in labelled property graphs? The brief answer is of course “No”, but the long answer keeps getting more interesting with RDF*/SPARQL* stackoverflow.com/a/55889556…
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Richard Cyganiak retweeted
Denny Vrandečić (@vrandezo) profile picture
Denny Vrandečić@vrandezo16 Apr 2019
Replying to @cygri
I couldn't help myself and also offered an answer. stackoverflow.com/questions/…
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Someone asked on StackOverflow how they can use the Linked Open Numbers dataset that @vrandezo et al published on April 1st, 2010. I tried to give a helpful answer… stackoverflow.com/q/55673324…
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Richard Cyganiak retweeted
Adrian Gschwend (@linkedktk) profile picture
Adrian Gschwend@linkedktk10 Apr 2019
🎉 Happy to announce RDF.community where we provide a Wiki & a Discourse discussion forum for a start. Our goal is to make this the number one place 🚀 to go for RDF, SPARQL and the whole Linked Data Stack & we need all your help for that!
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Richard Cyganiak retweeted
Andy Seaborne (@AndySeaborne) profile picture
Andy Seaborne@AndySeaborne29 Mar 2019
SPARQL 1.2 Community Group starting up: w3.org/community/sparql-12/ . Document features found as extensions and capture common needs from the user community.
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