jena-clj's Introduction

jena-clj

An idiomatic clojure wrapper to the Jena ontology management library.

Install

Leiningen / Boot:

[jena-clj "0.1.0"]

Gradle

compile "jena-clj:jena-clj:0.1.0"

Maven

<dependency>
  <groupId>jena-clj</groupId>
  <artifactId>jena-clj</artifactId>
  <version>0.1.0</version>
</dependency>

Usage

Some usage examples:

(require '[jena-clj.triplestore :as ts])
(import '[org.apache.jena.query ReadWrite])
(defonce db (ts/init-database "path/to/triplestore") ; If it doesn't exist, it creates one

(with-transaction db ReadWrite/WRITE
  (ts/insert-rdf db "path/to/rdf/or/ttl/file")) ; Loads a whole RDF file into triplestore
  
(with-transaction db ReadWrite/READ
  (ts/select-query 
    "prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
     SELECT ?uri ?name
     WHERE {?uri rdf:name ?name}")) ; Returns a lazy sequence with all results.

Take a look at triplestore.clj source for more!

Features

TDB Triplestore management
SPARQL queries

License

Distributed under the GNU General Public License v3.0

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jena-clj's Issues

jena-clj not compatible to Clojure 1.9 because it uses incorrect import expr in ns

jena-clj 0.1.0 is not usable in clojure 1.9 because there spec is whining about the fact that inside the (ns ...) expression, jena-clj uses the incorrect version of import without colon (correct is :import).

See this thread
https://groups.google.com/forum/#!msg/clojure/mIlKaOiujlo/Ls1H5HzbCwAJ