- From: Ted Thibodeau Jr <tthibodeau@openlinksw.com>
- Date: Thu, 14 Mar 2024 12:14:36 -0400
- To: Souripriya Das <souripriya.das@oracle.com>
- Cc: RDF-star WG <public-rdf-star-wg@w3.org>
- Message-Id: <DD8CD1FC-9EAB-41F8-95EF-86736F1FE69C@openlinksw.com>
> On Mar 10, 2024, at 08:34 AM, Souripriya Das <souripriya.das@oracle.com> wrote: > > fixed a typo in the Turtle example. > > From: Souripriya Das <souripriya.das@oracle.com> > Sent: Sunday, March 10, 2024 8:23 AM > To: RDF-star WG <public-rdf-star-wg@w3.org> > Subject: [External] : support for "bare" edges > > Here is a scenario where surface syntax support for "bare" edges (i.e., edges with no annotations) is important. > > Consider two entities: Workers and Jobs, I think those are not entities, but classes. > and a binary relationship "worksOn" connecting those two entities. I think that relationship connects instances of one of those two classes to instances of the other class. > There is also an attribute "daysPerWeek" for the "worksOn" relationship. Most workers work full-time. Only a handful that work part-time and "daysPerWeek" is populated only for part-time workers. > > A PG-minded user wants to only use "atomic" reifications because that is closest to the concept of edges in PG and comes up with the following: > > :e1 rdf:reifies <<( :w1 :worksOn :job1 )>> . > :e2 rdf:reifies <<( :w2 :worksOn :job1 )>> . > :e2 :daysPerWeek 3 . > > The ability to have a bare edge like :e1 above is important to avoid unnecessary increase in data size. You can always leave out any statements for which you have no value/object for a property/attribute/predicate of a subject/entity. RDF is perfectly suited to such sparse data. This is true whether the subject in question is an entity, a triple term, a pumpkin, etc. > Also, just to compare with PG, bare edges (i.e., edges with no edge-properties) are fully supported in PG. > > Using Turtle shortcuts, the 2nd and 3rd triple above may be compacted into a single statement. > > :e1 rdf:reifies <<( :w1 :worksOn :job1 )>> . > << :e2 | :w2 :worksOn :job1 >> :daysPerWeek 3 . > > Thanks, > Souri. Regards, Ted -- A: Yes. http://www.idallen.com/topposting.html | Q: Are you sure? | | A: Because it reverses the logical flow of conversation. | | | Q: Why is top posting frowned upon? Ted Thibodeau, Jr. // tel:+1-781-273-0900,1,32 Senior Support & Evangelism // mailto:tthibodeau@openlinksw.com // http://twitter.com/TallTed OpenLink Software, Inc. // http://www.openlinksw.com 117 Kendrick Street, Suite 300, Needham Heights, MA 02494-2722 Weblog -- http://www.openlinksw.com/blogs/ Community -- https://community.openlinksw.com/ LinkedIn -- http://www.linkedin.com/company/openlink-software/ Twitter -- http://twitter.com/OpenLink Facebook -- http://www.facebook.com/OpenLinkSoftware Universal Data Access, Integration, and Management Technology Providers
Received on Thursday, 14 March 2024 16:14:47 UTC