Re: Welcome to the RDF*/SPARQL* mailing list

Thanks for starting this list.

I'm Steve Sarsfield, currently working for Cambridge Semantics, makers of
AnzoGraph.

I am very excited that RDF* and SPARQL* are back on a path to acceptance by
the W3C.  These updates will not only bring RDF capability on parity with
the property database world, but will do it in a very elegant way. The
updates are necessary to rejuvenate interest in RDF/SPARQL.

As you may have read, Cambridge Semantics supports the proposed standards
and have already implemented much of Olaf's earlier proposal in AnzoGraph.
You can hear our head of engineering talking about it in a webinar
<https://info.cambridgesemantics.com/large-scale-graph-analytics-with-rdf-and-lpg-parallel-processing>we
did in October. The webinar includes some short-form examples of how we've
implemented.

Looking forward to the discussion.

*STEVE SARSFIELD *| Vice President Product, AnzoGraph

*e. *steve.sarsfield@cambridgesemantics.com

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*Cambridge Semantics*

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On Mon, Jul 8, 2019 at 6:09 AM Richard Cyganiak <richard@cyganiak.de> wrote:

> My intro:
>
> Richard Cyganiak
>
> Software engineer at TopQuadrant
>
> Editor of RDF 1.1 Concepts & Abstract Syntax and a number of other W3C
> recommendations
>
> My perspective on RDF*/SPARQL*:
>
> 1. It potentially addresses some significant use cases that currently are
> cumbersome to solve with the RDF stack.
>
> 2. Between the RDF reification vocabulary, named graphs, and now
> RDF*/SPARQL*, there are three different overlapping solutions to the
> problem of “data about data” in RDF. This creates an education/messaging
> problem and some work will be needed to guide the community.
>
> 3. If RDF*/SPARQL* were to become part of the official W3C recommendation
> stack, it would have a significant ripple effect where many documents would
> need to be updated over time. Having worked on several W3C recommendations,
> this is something I'd like to help with.
>
> 4. I have concerns about the RDF*/SPARQL* syntax that I'd like to discuss
> at some point.
>
> Looking forward to productive collaboration.
>
> Richard
>
>
>
>
> > On 6 Jul 2019, at 11:11, Olaf Hartig <olaf.hartig@liu.se> wrote:
> >
> > Hi all,
> >
> > I just wanted to welcome everyone who has already subscribed to this
> list!
> >
> > The main purpose of this list is to have a place where folks can ask and
> > discuss questions related to the RDF*/SPARQL* approach and how to use
> this
> > approach.
> >
> > If you are here to help or support the work on the submission document
> about
> > RDF*/SPARQL*, I will send another email later to share details about how
> we
> > are going to do this. Given that the vacation period here has started,
> > probably not much is going to happen anyways during the next weeks.
> >
> > In the meantime, maybe, everyone who has joined the list may introduce
> > themselves; who are you and what's your interest in RDF*/SPARQL*?
> >
> > For myself, I simply list the documents I wrote about about RDF*/SPARQL*
> with
> > a brief summary of what each of them provides:
> >
> > 1/ As an introductory document I created the short position statement
> that I
> > wrote for the W3C workshop in March 2019 in Berlin. This position
> statement
> > provides a brief motivation and an overview of the approach, a summary
> of its
> > properties, and pointers to other publications and material.
> >
> http://blog.liu.se/olafhartig/2019/01/10/position-statement-rdf-star-and-sparql-star/
> >
> > 2/ "Foundations of an Alternative Approach to Reification in RDF"
> > http://arxiv.org/pdf/1406.3399
> > This is the initial document that I wrote together with Bryan Thompson.
> The
> > main contributions of this document are a formal definition of the RDF*
> data
> > model, a mapping from RDF* to pure RDF with the RDF reification
> vocabulary, a
> > definition of the Turtle* grammar, a formal definition of SPARQL*, and a
> precise
> > specification of how SPARQL* (as a query language) extends the W3C
> > recommendation of the SPARQL 1.1 Query Language.
> >
> > 3/ "SPARQL* Update"
> > http://blog.liu.se/olafhartig/documents/sparql-update/
> > This document specifies SPARQL* Update, which is an RDF*-specific
> extension of
> > SPARQL Update.
> >
> > 4/ "Foundations of RDF* and SPARQL* - An Alternative Approach to
> Statement-
> > Level Metadata in RDF"
> > http://olafhartig.de/files/Hartig_AMW2017_RDFStar.pdf
> > This document is a research paper that looks at redundancy in RDF*
> graphs, and
> > shows that the reification-based mappings from RDF* to RDF and from
> SPARQL* to
> > SPARQL possess two desirable properties: they are information preserving
> and
> > query result preserving.
> >
> > 5/ "Reconciliation of RDF* and Property Graphs"
> > http://arxiv.org/pdf/1409.3288
> > This document describes the relationship between RDF* and the Property
> Graph
> > data model. More technically, this document provides two formal mappings
> from
> > RDF* graphs to Property Graphs, and one such mapping in the other
> direction
> > (PG to RDF*).
> >
> > Additionally, together with some of my students, we have developed an
> RDF*/
> > SPARQL* extension of the Java RDF framework Apache Jena to provide a
> > collection of tools and Java libraries to process RDF* data and SPARQL*
> > queries. See: https://github.com/RDFstar/RDFstarTools
> > Moreover, we have some preliminary extension of these tools that connect
> RDF*
> > and Property Graphs: https://github.com/RDFstar/RDFstarPGConnectionTools
> >
> >
> > Olaf
> >
> > -----
> > Dr. Olaf Hartig, Docent
> > Associate Professor (Universitetslektor, docent)
> > Division for Database and Information Techniques (ADIT)
> > Department of Computer and Information Science (IDA)
> > Linköping University
> >
> > Website: http://olafhartig.de
> > Office: Building B, Ground floor, Room 2B:478
> >
> > Postal address:
> >      Dept. of Computer and Information Science (IDA)
> >      Linköpings universitet
> >      SE-581 83 Linköping
> >      SWEDEN
> >
>
>
>