Jakob, you may also be able to tweak Pubby to use a SPARQL CONSTRUCT query instead of DESCRIBE, in which case you can implement your Linked Data pages in SPARQL. Note that you may find that listing all the triples in which a given resource appears as the object or predicate will yield a very large number of triples. You may find you need to implement some kind of pagination mechanism.
On 6 March 2017 at 22:19, Beetz, J. <[email protected]> wrote: > Hi Andy, > > Thanks a lot, this are exactly the pointers I had whished for! > > I will give this a try. > > Thank you for your quick and helpful answer, > Jakob > > _______________________________________________________________ > Dr. Jakob Beetz - Assistant Professor > Information Systems in the Built Environment (ISBE) Group > Department of the Built Environment | Bouwkunde > Eindhoven University of Technology, The Netherlands > phone: +31 (0)40 247 2288 on-campus location: VRT 9.J06 > > > -----Original Message----- > > From: Andy Seaborne [mailto:[email protected]] > > Sent: zaterdag 4 maart 2017 20:00 > > To: [email protected] > > Subject: Re: Fuseki / ARQ DESCRIBE query to include ?s ?p <incoming > resource> > > > > Minor clarification: > > > > Fuseki's default behaviour is the calculate the blank node closure based > > on the "subject (<incoming resource> ?p ?o)". > > > > > > There's a registry DescribeHandlerRegistry and a context key for setting > > it (ARQConstants.registryDescribeHandlers). > > > > The registry keeps a list of DescribeHandlerFactory and calls each one > > on the list. > > > > Adding to that list or setting per query is doable but it's Java - in > > Fuseki from just configuring, it's not doable. > > > > Adding a context setting to set the DescribeHandle policy by name would > > achieve that. > > > > Andy > > > > e.g. > > https://gist.github.com/shellac/1313924 > > > > On 03/03/17 10:13, Beetz, J. wrote: > > > Dear community, > > > > > > I have set up a Pubby http://wifo5-03.informatik. > uni-mannheim.de/pubby/ > > frontend to allow dereferencing/content-negotiation/browser-navigation > of a > > vocabulary served by Fuseki 2.4.1 . > > > As per the SPARQL standard, the default behavior of DESCRIBE queries > that are > > sent by the frontend to Fuseki is left to the implementation. Fusekis > default > > behavior is to send back the graph containing all triples where <incoming > > resource> is the subject (<incoming resource> ?p ?o). I would also like > to > > include (?s ?p <incoming resource> and probably (?s <incoming resource> > ?o). > > > > > > From the list archive I have seen that I can probably implement my own > > execDescribe() similar to this thread from some time ago: > > > > > http://jena.markmail.org/message/5thzze4xhqhak34g?q= > describe+query+%3Fs+%3Fp+%3 > > Fo&page=2#query:describe%20query%20%3Fs%20%3Fp%20%3Fo+ > page:2+mid:5thzze4xhqhak3 > > 4g+state:results > > > > > > I wonder whether there is another (easier) way through a configuration > > setting or similar which allows me to achieve this. > > > > > > Thank you very much in advance for your help > > > > > > Jakob > > > > > > _______________________________________________________________ > > > Dr. Jakob Beetz - Assistant Professor > > > Information Systems in the Built Environment (ISBE) Group > > > Department of the Built Environment | Bouwkunde > > > Eindhoven University of Technology, The Netherlands > > > phone: +31 (0)40 247 2288 on-campus location: VRT 9.J06 > > > > -- Conal Tuohy http://conaltuohy.com/ @conal_tuohy +61-466-324297
