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Euler Yet another proof Engine - EYE

EYE

DOI

EYE is a reasoning engine supporting the Semantic Web layers and implementing Notation3.

EYE performs forward and backward chaining along Euler paths. Forward chaining is applied for rules using => in Notation3 and backward chaining is applied for rules using <= in Notation3 which one can imagine as user defined built-ins. Euler paths are roughly "don't step in your own steps" which is inspired by what Leonhard Euler discovered in 1736 for the Königsberg Bridge Problem.

Installation

Test the EYE installation via command line eye --version and it should return the version which is in the file VERSION.

Usage

Create a test Notation3 file. We use the file socrates.n3 as example:

$ cat socrates.n3
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix : <http://example.org/socrates#>.

:Socrates a :Human.
:Human rdfs:subClassOf :Mortal.

{
    ?S a ?A .
    ?A rdfs:subClassOf ?B . 
} 
=> 
{
    ?S a ?B .
} .

Run the EYE reasoner without proof explanation, in quiet mode and passing all deductive closures to the output:

$ eye --nope --quiet --pass socrates.n3
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix : <http://example.org/socrates#>.

:Socrates a :Human.
:Socrates a :Mortal.
:Human rdfs:subClassOf :Mortal.

Tutorial and example scripts

Online versions of EYE

References

Publications

Verborgh, R. , De Roo, J. : Drawing Conclusions from Linked Data on the Web: The EYE Reasoner. IEEE Software (2015) Online Version

License & copyright

MIT License

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