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swish: A semantic web toolkit.

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Swish is a framework, written in the purely functional programming language Haskell, for performing deductions in RDF data using a variety of techniques. Swish is conceived as a toolkit for experimenting with RDF inference, and for implementing stand-alone RDF file processors (usable in similar style to CWM, but with a view to being extensible in declarative style through added Haskell function and data value declarations). It explores Haskell as "a scripting language for the Semantic Web".

Swish is a work-in-progress, and currently incorporates:

  • Turtle, Notation3 and NTriples input and output. The N3 support is incomplete (no handling of @forAll).

  • RDF graph isomorphism testing and merging.

  • Display of differences between RDF graphs.

  • Inference operations in forward chaining, backward chaining and proof-checking modes.

  • Simple Horn-style rule implementations, extendable through variable binding modifiers and filters.

  • Class restriction rule implementation, primarily for datatype inferences.

  • RDF formal semantics entailment rule implementation.

  • Complete, ready-to-run, command-line and script-driven programs.

Changes in version 0.9.0.4:

  • Turtle parser: updated to the Candidate Recommendation (19 February 2013) specification; added minor improvements to error messages when given invalid syntax. As part of the upgrade, there is no longer a default namespace set up for the empty prefix and numeric literals are no-longer converted into a canonical form.

  • Turtle/N3 output: improved string formatting (better handling of string literals with three or more consecutive " characters); blank node handling has been improved but the output may not be as elegant.

  • NTriples parser: now accepts upper-case language tags such as en-UK (case is preserved).

  • Swish.QName.LName names can now contain #, : and / characters.

  • Added tests for the Turtle parser and formatter.

  • The new w3ctests flag will build the runw3ctests executable, which will run the W3C Turtle tests (if downloaded from http://www.w3.org/2013/TurtleTests/).

  • Minor fixes and additions to the documentation.

Changes in version 0.9.0.3:

  • Minor Haddock fix to Swish.RDF.Parser.Utils.appendURIs.

Changes in version 0.9.0.2:

  • Updated the upper bound on the polyparse dependency.

Changes in version 0.9.0.1:

  • Updated the upper bound on the semigroup dependency (thanks to Leif Warner).

Changes in version 0.9.0.0:

  • Updated to support hashable-1.2 series; although this should *not* change the API from the 0.8 series, I have decided to bump up the version to 0.9 just in case.

  • Fix failing test on 64-bit GHC (no change to the library).

Changes in previous versions can be found at https://bitbucket.org/doug_burke/swish/src/tip/CHANGES.

References:

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Versions [RSS] 0.2.1, 0.3.0.0, 0.3.0.1, 0.3.0.2, 0.3.0.3, 0.3.1.0, 0.3.1.1, 0.3.1.2, 0.3.2.0, 0.3.2.1, 0.4.0.0, 0.5.0.0, 0.5.0.1, 0.5.0.2, 0.5.0.3, 0.6.0.0, 0.6.0.1, 0.6.1.0, 0.6.1.1, 0.6.1.2, 0.6.2.1, 0.6.3.0, 0.6.4.0, 0.6.5.0, 0.6.5.1, 0.6.5.2, 0.7.0.0, 0.7.0.1, 0.7.0.2, 0.8.0.0, 0.8.0.2, 0.8.0.3, 0.9.0.0, 0.9.0.1, 0.9.0.2, 0.9.0.3, 0.9.0.4, 0.9.0.5, 0.9.0.6, 0.9.0.7, 0.9.0.8, 0.9.0.9, 0.9.0.10, 0.9.0.11, 0.9.0.12, 0.9.0.13, 0.9.0.14, 0.9.0.15, 0.9.1.0, 0.9.1.1, 0.9.1.2, 0.9.1.3, 0.9.1.5, 0.9.1.6, 0.9.1.7, 0.9.1.8, 0.9.1.9, 0.9.1.10, 0.9.2.0, 0.9.2.1, 0.10.0.0, 0.10.0.1, 0.10.0.2, 0.10.0.3, 0.10.0.4, 0.10.0.5, 0.10.0.6, 0.10.0.7, 0.10.0.8, 0.10.0.9, 0.10.1.0, 0.10.2.0, 0.10.3.0, 0.10.4.0, 0.10.5.0, 0.10.6.0, 0.10.7.0, 0.10.8.0, 0.10.9.0, 0.10.10.0
Dependencies base (>=3 && <5), containers (>=0.4 && <0.6), directory, filepath (>=1.1 && <1.4), hashable (>=1.1 && <1.2 || >=1.2.0.6 && <1.3), intern (>=0.8 && <1.0), mtl (>=2 && <3), network (>=2.2 && <2.5), old-locale (>=1.0 && <1.1), polyparse (>=1.6 && <=1.9), semigroups (>=0.5 && <0.10), swish, text (>=0.11 && <0.12), time (>=1.1 && <1.5) [details]
Tested with ghc ==7.6.3
License LicenseRef-LGPL
Copyright (c) 2003, 2004 G. Klyne; 2009 Vasili I Galchin; 2011, 2012, 2013 Doug Burke; All rights reserved.
Author Graham Klyne - GK@ninebynine.org
Maintainer dburke@cfa.harvard.edu
Category Semantic Web
Home page https://bitbucket.org/doug_burke/swish/wiki/Home
Bug tracker https://bitbucket.org/doug_burke/swish/issues
Source repo head: hg clone https://bitbucket.org/doug_burke/swish
Uploaded by DouglasBurke at 2013-08-21T03:22:04Z
Distributions Debian:0.10.1.0, LTSHaskell:0.10.10.0, NixOS:0.10.10.0, Stackage:0.10.10.0
Reverse Dependencies 1 direct, 0 indirect [details]
Executables runw3ctests, Swish
Downloads 52809 total (215 in the last 30 days)
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Readme for swish-0.9.0.4

[back to package description] 
# Introduction

Swish - which stands for Semantic Web Inference Scripting in Haskell -
was written by Graham Klyne as a framework, written in the purely
functional programming language Haskell, for performing deductions in
RDF data using a variety of techniques. Swish wass conceived as a
toolkit for experimenting with RDF inference, and for implementing
stand-alone RDF file processors (usable in similar style to CWM, but
with a view to being extensible in declarative style through added
Haskell function and data value declarations). One of the aims was to
explore Haskell as "a scripting language for the Semantic Web"
(http://www.ninebynine.org/RDFNotes/Swish/Intro.html).

It was updated from version 0.2.1 by Vasili I Galchin so that it would
build with recent version of GHC
(http://hackage.haskell.org/package/swish-0.2.1).

Since then it has been updated to take advantage of recent
developments in the Haskell ecosystem, add support for the NTriples
and Turtle serialisation formats, and a number of convenience
functions. Development is done at
https://bitbucket.org/doug_burke/swish/.

# Aim

Current development is based on my own needs, which are more about
using this as a RDF library for I/O with limited querying rather than
for inferencing or use as a flexible graph-processing library
(e.g. for extensions to non-RDF models).

# Copyright

(c) 2003, 2004 G. Klyne
(c) 2009 Vasili I Galchin
(c) 2011, 2012, 2013 Doug Burke

All rights reserved.

# License

GPL V2

# Haskell and the Semantic Web 

Other Haskell packages for RDF support include

 * rdf4h http://hackage.haskell.org/package/rdf4h
 * hsparql http://hackage.haskell.org/package/hsparql
 * hasparql-client http://hackage.haskell.org/package/hasparql-client

# Installation

Install a recent version of the Haskell platform (http://hackage.haskell.org/platform/)
and then try

    % cabal update
    % cabal install swish

This will install a command-line tool `Swish` along with the modules
in the `Swish` namespace; documentation can be found at
http://hackage.haskell.org/package/swish .