roxi-js v0.1.3

RoXi

RoXi provides a uniform framework for Reactive Reasoning applications including:

• Incremental maintenance
• RDF Stream Processing

• Temporal Reasoning (TODO)

RoXi also supports efficient materialization of static data.

RoXi uses some of the internals of oxigraph, including sparqlalgebra and OxRDF.

RoXi can be included as a library, run in server mode through CLI or in the browser using web assembly. You can try it out in your own browser!

Usage

Example usage when using the static reasoner:

import {RoxiReasoner} from "roxi-js";
// create the reasoner
const reasoner = RoxiReasoner.new();
// add ABox 
reasoner.add_abox("<http://example2.com/a> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.test.be/test#SubClass> .");
// Add rules
reasoner.add_rules("@prefix test: <http://www.test.be/test#>.\n @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.\n {?s rdf:type test:SubClass. }=>{?s rdf:type test:SuperType.}");
// perform materialization through forward chaining
reasoner.materialize();
// log a dump of the materialized abox
console.log(reasoner.get_abox_dump());

Example usage when using the RSP engine:

import {JSRSPEngine} from "roxi-js";
// callback function
function callback(val) {
    console.log(val);
}
let width = 10;
let slide = 2;
let rules = "@prefix test: <http://test/>.\n @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.\n {?x test:isIn ?y. ?y test:isIn ?z. }=>{?x test:isIn ?z.}";
let abox = "";
let query = "Select * WHERE{ ?x <http://test/isIn> ?y}";
// create the engine
let rspEngine = JSRSPEngine.new(width,slide,rules,abox,query,callback);
// add some data
let event = "<http://test/0> <http://test/isIn> <http://test/1>.";
let currentTimeStamp = 0;
rspEngine.add(event, currentTimeStamp);
...
let event = ... ;
currentTimeStamp += 1;
rspEngine.add(event, currentTimeStamp);