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kraison / vivace-graph-v2

Superceded by https://github.com/kraison/vivace-graph-v3 Open source Common Lisp graph database / RDF store / Prolog implementation. Supersedes http://github.com/kraison/vivace-graph.
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A free competitor to Franz's AllegroGraph by Kevin Raison.

At the moment, this code is in a state of rapid flux. Please don't expect it to behave consistently from one check-in to another.

The goal is to build a fast, robust, distributed graph database with optional RDF semantics built-in. The primary query language is Prolog (based on PAIP), but I have plans to add Javascript and maybe Sparql at a later date. At the moment, persistence is achieved via transaction logging and replay. I am also working on a native SBCL memory mapped persistence library that will give me some variation on linear hash tables.

The code checked-in as of 2012/05/06 works fairly well, but should be considered alpha quality. In order to get it working, you will need the following:

SBCL 1.0.42 or higher: http://www.sbcl.org/platform-table.html cl-skip-list: http://www.cliki.net/cl-skip-list bordeaux-threads: http://common-lisp.net/project/bordeaux-threads/ hunchentoot: http://weitz.de/hunchentoot/ cl-json: http://common-lisp.net/project/cl-json/ uuid: http://www.dardoria.net/software/uuid.html ieee-floats: http://common-lisp.net/project/ieee-floats/ parse-number: http://www.cliki.net/PARSE-NUMBER cffi: http://common-lisp.net/project/cffi/ local-time: http://common-lisp.net/project/local-time/ date-calc: http://common-lisp.net/project/cl-date-calc/ py-configparser: http://common-lisp.net/project/py-configparser/ js: http://github.com/akapav/js split-sequence: http://www.cliki.net/SPLIT-SEQUENCE Montezuma

To get you started: (asdf:oos 'asdf:load-op 'vivace-graph-v2) (in-package #:vivace-graph-v2)

(create-triple-store :name "test store" :location "/var/tmp/db") (index-predicate "likes") (with-graph-transaction (store) (add-triple "Kevin" "is-a" "human") (add-triple "Joe" "is-a" "human") (add-triple "Fido" "is-a" "dog") (add-triple "Kevin" "likes" "Fido") (add-triple "Kevin" "likes" "Joe") (add-triple "Joe" "likes" "programming lisp") (add-triple "Kevin" "likes" "programming lisp") (add-triple "Kevin" "likes" "programming perl") (add-triple "Kevin" "likes" "programming c"))

(select (?x ?y) (q- ?x "likes" ?y))

(get-triples-list :search-string "programming")

(get-triples-list :s "Kevin") (get-triples-list :p "is-a") (close-triple-store :store store)

(open-triple-store :name "test store" :location "/var/tmp/db") (index-predicate "likes") (select (?x ?y) (q- ?x "likes" ?y)) (select-flat (?object) (q- "Kevin" "likes" (?object "a" "z"))) (get-triples-list :s "Kevin") (get-triples-list :p "is-a") (close-triple-store :store store)