- From: James Anderson <anderson.james.1955@gmail.com>
- Date: Thu, 21 Aug 2025 03:17:21 +0200
- To: RDF-star Working Group <public-rdf-star-wg@w3.org>
On 20. Aug 2025, at 22:30, Andy Seaborne <andy@apache.org> wrote: > > > > On 16/08/2025 15:45, Peter F. Patel-Schneider wrote: >> There was again discussion in the SPARQL EXISTS task force on different solutions to the SPARQL EXISTS problems. The solutions amount to, roughly: >> Simple LEFTJOIN, where no bindings from outside the EXISTS affect the pattern inside. > > SEMIJOIN? is it not the case that, where no variable from the solution is free in the exists pattern, that pattern reduces to a boolean constant value which depends only on the state of the target graph? > >> Values injection at the beginning of the pattern (SHALLOW INJECTION). >> Values injection inside the pattern (DEEP INJECTION), with two variations >> values projected out in sub-SELECTs are not affected (PROJECTION) and >> values projected out in sub-SELECTs are affected. > > > --- james anderson | james@dydra.com | https://dydra.com
Received on Thursday, 21 August 2025 01:17:37 UTC