- From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
- Date: Mon, 23 Jan 2023 19:39:58 -0500
- To: public-rdf-star-wg@w3.org
For some of these examples it is unclear what is going on. For example, is
Sherman Klump a string or an object? Similarly for 135025560000; Jan10, 2011;
and friends. Without this information it is unclear what edge annotations
are being used.
peter
On 1/23/23 19:19, Thomas Lörtsch wrote:
> Hi,
>
> I collected some use cases for edge annotations by googling for "property graph example", checking some popular books on graph databases and consulting RDF-star implementors' documentations. It wasn’t a very systematic effort but I swear I didn’t pick favorites.
> I did put a little effort in formatting, so with a monospaced font it should be fairly readable. When the example has 2 columns and 3 rows then the left column are subject, predicate and object of a statement and the right column are the attributes - you’ll get the idea.
>
> Best,
> Thomas
>
>
>
>
> EXAMPLES:
>
>
> Dave Bechberger, Josh Perryman - Graph Databases in Action, Manning Publications, 2020
> Figure 2.18 Adding a role property to the acted_in edge creates a mutiple uniqueness edge to express the fact that Eddie Murphy acted in multiple roles in the movie Nutty Professor.
>
> person Eddie Murphy
> acted_in role: Sherman Klump, Buddy Love
> movie Nutty Professor
>
>
>
> Ian Robinson, Jim Webber, Emil Eifrim - Graph Databases New opportunities for Connected Data, O’Reilly, 2015
> Figure 5-16. Timestamp properties on relationships
>
> id:1 Location: Parcel Center
> CONNECTED_TO cost: 3, start_date: 13502556000000, end_date: 13508604000000
> id:1, name:… Location: Delivery Base
>
>
>
> Neo4j Developer, Why Graph Databases?
> https://neo4j.com/developer/graph-database/
>
> Person name: Dan, born: May 29 1970, twitter: "@dan"
> drives since: Jan 10, 2011
> Car brand: "Volvo", model: "V70"
>
>
>
> Neo4j Blog, RDF Triple Stores vs. Labeled Property Graphs: What’s the Difference?
> https://neo4j.com/blog/rdf-triple-store-vs-labeled-property-graph-difference/
>
> 2042819 name: NYC
> CONNECTION distanceKm: 4100, costUSD: 300
> 2042820 name: SFO
>
>
>
> Oracle, Graph Developer's Guide for Property Graph, 1.1.1 What Are Property Graphs?
> https://docs.oracle.com/en/database/oracle/property-graph/22.2/spgdg/what-are-property-graphs.html
>
> 1 name: Alice, age: 31
> knows type: friends
> 2 name: Bob, age: 27
>
>
>
> Oxford Semantics, What is a labeled property graph?
> https://www.oxfordsemantic.tech/fundamentals/what-is-a-labeled-property-graph
>
> ID: "12345", Label: "Person"
> name: "Alice", dateOfBirth: "1975-10-22", height: 1.70
> ID "24680", Label: "Married"
> date: "2004-09-19"
> ID: "67890", Label: "Person"
> name: "Bob", dateOfBirth: "1976-01-07", height: 1.75
>
>
>
> TerminusDB Community Blog post, Graph Fundamentals — Part 2: Labelled Property Graphs
> https://medium.com/terminusdb/graph-fundamentals-part-2-labelled-property-graphs-ba9a8edb5dfe
>
> NODE name: "Andy", title: "Developer"
> EDGE rid:"MANAGES", from: 2011-12-12
> NODE name: "Bob", title: "Manager"
>
>
>
> OpenCredo, Blog post, Making Sense of Data with RDF* vs. LPG
> https://opencredo.com/blogs/making-sense-of-data-with-rdf-vs-lpg/
>
> Elon Musk
> FOUNDED startDate: "2002-03-14", source: "https://en.wikipedia.org/wiki/SpaceX"
> SpaceX
>
>
>
> Cambridge Semantics, AnzoGraphDB 2.5, Creating and Querying Labeled Property Graphs (RDF*)
> https://docs.cambridgesemantics.com/anzograph/v2.5/userdoc/lpgs.htm?Highlight=Labeled%20Property%20Graphs%20RDF*
>
> @prefix tickit: <http://anzograph.com/tickit/> .
>
> tickit:person3
> rdf:type tickit:person ;
> tickit:card "4984932249480735"^^xsd:long ;
> tickit:birthday "1963-07-02"^^xsd:date ;
> […] .
> << tickit:person3 tickit:like "sports" >> tickit:weight 8 .
> << tickit:person3 tickit:like "rock" >> tickit:weight 9 .
> […]
> << tickit:person3 tickit:friend tickit:person8563 >> tickit:startDate "1990-01-04"^^xsd:date .
> << tickit:person3 tickit:friend tickit:person38436 >> tickit:startDate "2000-04-27"^^xsd:date .
> << tickit:person3 tickit:friend tickit:person11979 >> tickit:startDate "2004-11-09"^^xsd:date .
> << tickit:person3 tickit:friend tickit:person11979 >> tickit:endDate "2012-07-17"^^xsd:date .
> tickit:person3 tickit:friend tickit:person8639,
> […]
> tickit:person11979,
> […]
> tickit:person38436
> […] .
>
> [In this example something went wrong with asserting quoted triples:
> person11979 should not be listed as friend anymore and
> it’s unclear why person8563 isn’t listed.
> Maybe a mishap, or mabye the friendship ended but we don’t know the date.]
>
>
>
> Renzo Angles, 2018, The Property Graph Database Model
> http://ceur-ws.org/Vol-2100/paper26.pdf
>
> Entry title, numpages, keyword
> hasAuthor order
> Author fname, lname
>
> InProceedings (inherits from Entry)
> booktitle pages
> Proceedings title, year, month
>
> Article (inherits from Entry)
> publishedIn pages
> Journal title, year, vol, num
>
>
>
> Stardog, Query Stardog/Edge Properties (beta)
> https://docs.stardog.com/query-stardog/edge-properties
>
> << :Pete a :Engineer >> :since 2010 .
> << :Pete :worksAt :Stardog >> :source :HR .
>
> :Pete a { :since 2010 ; until 2018} :Engineer ;
> :worksAt { :source :HR } :Stardog
>
>
>
> Stardog, Blog, Property Graphs meet Stardog
> https://www.stardog.com/blog/property-graphs-meet-stardog/
>
> << :Alice :worksFor :ACME >> :role :CEO ;
> :since 2010 ;
> :probability 0.8 ;
> :source <http://example.com/news> .
>
> :Alice :worksFor {:role :CEO ;
> :since 2010 ;
> :probability 0.8 ;
> :source <http://example.com/news>} :ACME ;
> :birthDate {:probability 0.2} "1972-01-01"^^xsd:date ;
> :nationality {:source <http://example.org/Alice>} :USA .
>
>
>
> GraphDB 9.2 Documentation, RDF* and SPARQL*
> https://graphdb.ontotext.com/documentation/9.2/free/devhub/rdf-sparql-star.html#id1
> (the current 10.1 docs use the same examples, just with explicit namespaces)
>
> :man :hasSpouse :woman .
> <<:man :hasSpouse :woman>> :startDate "2020-02-11"^^xsd:date .
>
> <<:man :hasSpouse :woman>> ex:certainty 0.9 .
>
> Object relation qualifiers:
> <<:man :hasSpouse :woman>> :startDate "2020-02-11"^^xsd:date
>
> Data value qualifiers:
> <<:painting :height 32.1>>
> :unit :cm;
> :measurementTechnique :laserScanning;
> :measuredOn "2020-02-11"^^xsd:date.
>
> Statement sources/references:
> <<:man :hasSpouse :woman>>
> :source :TheNationalEnquirer;
> :webpage <http://nationalenquirer.com/news/2020-02-12>;
> :retrieved "2020-02-13"^^xsd:dateTime.
>
>
>
> Apache Jena, Documentation Support of RDF-star
> https://jena.apache.org/documentation/rdf-star/
>
> SELECT ?name { <<:john foaf:name ?name >> dct:source <http://example/directory> }
>
> B.t.w., the page also says:
> "Translating back to RDF-star relies on the consistency constraint
> that there is only one reification for each unique quoted triple term."
> That's another way to illustrate how misguided the type-based approach of RDF-star is.
>
>
>
> TopQuadrant, RDF-Star – Why, how and when should you use it?
> https://www.topquadrant.com/resources/rdf-star-why-how-and-when-should-you-use-it
>
> example:Irene rdfs:label “Irene” ;
> rdf:type example:Person ;
> example:worksFor example:TopQuadrant .
> <urn:triple:%3Chttp%3A%2F%2Fexample.org%2Freification%23Irene%3E:%3Chttp%3A%2F%2Fexample.org%2Freification%23worksFor%3E:%3Chttp%3A%2F%2Fexample.org%2Freification%23TopQuadrant%3E>
> example:startDate “2001-12-01″^^xsd:date .
>
>
>
> rdf4j, Doumentation, RDF-Star and SPARQL-Star
> https://rdf4j.org/documentation/programming/rdfstar/
>
> <<ex:bob foaf:age 23>> ex:certainty 0.9 .
>
>
Received on Tuesday, 24 January 2023 00:40:12 UTC