Erik, Did you use a bottom up evaluation strategy? What top level optimizations did you use (e.g. magic sets and so on)?
On Feb 3, 6:34 am, hoeck <i_am_wea...@kittymail.com> wrote: > Hi, > > On Feb 2, 3:42 pm, Timothy Pratley <timothyprat...@gmail.com> wrote: > > > > > Hi Jeffrey, > > > On Feb 1, 4:50 am, Jeffrey Straszheim <straszheimjeff...@gmail.com> > > wrote: > > > > However, I'm not sure if you can built your own predicates in Java > > > code (and therefore in Clojure code). That seems like a feature we'd > > > want. I've sent an email to their support folks to find out if this > > > is possible. > > > I gave it a crack. It is definitely possible (perhaps even easy if you > > are familiar with the nomenclature). Setting up the primitive support > > is trivial, but combining the parts sent me into a spin - enter a DSL > > which seems the logical aim (is this indeed the intention?)... > > >http://github.com/timothypratley/strive/blob/80a3e41af4c8d882c0330ff1... > > > Here is where I got to so far... does the cheats method (parse) to > > demonstrate simple facts/rules/query, then exposes the underlying > > primitives that could be used to build the same expression without > > parsing. Then I got somewhat lost and figured I'd call it a night :) > > Did the same thing some time ago. Iris has good (at least good enough) > API docs in pdf and javadoc form. Inspired by the Allegro CL Prolog > syntax i set up a little DSL for writing datalog programs and > providing relations from clojure-sets and sql-queries. Unfortunately > the whole package is currently broken while I'm completing the > surrounding relational algebra library. > But maybe someone wants to look at the code: > > http://github.com/hoeck/ra/blob/a018f2347fb409e7adc438f9c8b74fe8fecc5... > > the simpsons example would then look like: > (clear-universe) > (<- (man '#{homer})) > (<- (woman '#{marge})) > (<- (hasSon '#{[homer bart]})) > (<- (isMale ?x) (man ?x)) > (<- (isFemale ?x) (woman ?x)) > (<- (isMale ?y) (hasSon ?x ?y)) > > (?- (isMale ?x)) > > I hope to get it running again soon. > > > I couldn't find much info (any?) at all on the web about Datalog or > > how to use IRIS in general... it certainly seems interesting as a > > solver, but in practical terms how can I take advantage of it? Ok I > > can think of some classic solver type problems (which are indeed > > practical), but I get the impression Datalog is slated for greater > > things, ie: general data modeling? > > Iris is hosted at the Semantic Technology Institute (STI) Innsbruck, > reading through their research projects page leads to a new iris page, > describing its goal as: > "It is the mission of the IRIS research unit to define languages for > describing data and Web services, and to build software components to > reason about these data and service descriptions in order to make the > vision of the Semantic Web a reality." (http://iris.sti-innsbruck.at) > > So you're probably right about it being for greater things. > > erik --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
