Developers Guide to Semantic Web Toolkits
for different Programming Languages

This Version:
http://www.wiwiss.fu-berlin.de/suhl/bizer/toolkits/06062006/
Latest Version:
http://www.wiwiss.fu-berlin.de/suhl/bizer/toolkits/
Date:
01/15/2007
 
Authors:
Chris Bizer (Freie Universität Berlin, Germany)
Daniel Westphal (Freie Universität Berlin, Germany)


Abstract

This guide collects links to Semantic Web toolkits for different programming languages and gives an overview about the features of each toolkit, the strength of the development effort and the toolkit's user community.

Table of Contents

 


1. Introduction

This guide collects links to Semantic Web toolkits for different programming languages. We evaluate for each toolkit:

Our current evaluation results are found below. The information was collected by us from the websites of the toolkits or was sent to us by the developers of the toolkits. Thanks a lot to all toolkit developers and users who helped to create this guide.

Request for Support

We are trying to keep this guide up-to-date. So:

All hints are highly appreciated. Please send feedback to: chris@bizer.de

Alternative Toolkit Lists

Other, alternative toolkit lists are found at


2. Toolkit Comparison

This chapter lists all known toolkits ordered by programming language.
The comparison criteria are explained at the end of this document.

2.1 C

 
Redland 1.0.5 3Store 2.2.18 TAP 0.75
Latest Release
11/2006
11/2004 04/2003
Number of
Developers
1
5 8
Downloads
(01/2005)
?
420 ?
Active
Mailing-List
+
+ +
License
GPL, LGPL, Apache
GPL BSD
API-
Paradigm
Statement-centric
Model-centric Statement-centric
Resource-centric
Query-
Languages
RDQL
SPARQL
RDQL
OKBC
GetData
Model
Storage
Memory
DB
File
DB File
Supported
Databases

Berkeley DB
MySQL
SQLite
AKT Triplestore
PostgreSQL

MySQL -
Supported
Serialization
Formats
RDF/XML
N-Triples
Turtle
RSS
? RDF/XML
Reasoning
Support
-
- -
RDF Server
-
+ +
Other
Features
Language bindings
for C#, Java, Obj-C,
Perl, PHP, Python,
Ruby and Tcl  
  Clients for
JAVA and PERL
TAPache Apache
Module for
publishing data.
Comments    

 

 
RDFStore 0.50
Latest Release
08/2004
Number of
Developers
3
Downloads
(01/2005)
?
Active
Mailing-List
-
License
API-
Paradigm
Model-centric
Query-
Languages
RDQL
SPARQL
Model
Storage
Memory
DB
File
Remote
Supported
Databases

Berkeley DB

Supported
Serialization
Formats
RDF/XML
N-Triples
XML
(using SPARQL
DAWG-XML format)
Reasoning
Support
RDFS
owl:sameAs
RDF Server
Other
Features
Language bindings
for Perl
Comments Native DB support for
xsd:date, xsd:dateTime,
xsd:integer, xsd:double

 

2.2 Haskell

 
Swish 0.2.1
Latest Release
02/2004
Number of
Developers
1
Downloads
(01/2005)
?
Active
Mailing-List
-
License
GPL
API-
Paradigm
Model-centric
Query-
Languages
-
Model
Storage
Memory
Supported
Databases

-

Supported
Serialization
Formats
N3
Reasoning
Support
RDFS
RDF Server
-
Other
Features
 
Comments  

 

2.3 JAVA

 
JENA 2.4 Sesame 2.0 Kowari 1.1
Latest Release
5/2006
2/2006
12/2005
Number of
Developers
11
12
8
Downloads
(01/2005)
24600
6100
1300
Active
Mailing-List
+
+
+
License
BSD
LGPL
Mozilla Public
License
API-
Paradigm
Statement-centric
Resource-centric
Ontology-centric
Statement-centric
Resource-centric
Ontology-centric

Statement-centric
Resource-centric
Ontology-centric

Query-
Languages
RDQL
SPARQL
SeRQL
SPARQL
iTQL
Model
Storage
Memory
DB
File

Memory
DB
File
Native
RDF Repository

Native
RDF Repository
Supported
Databases

MySQL
PostgreSQL
Oracle
BerkeleyDB
MS SQLServer
DB2
HSQLDB

MySQL
XA Triplestore
Supported
Serialization
Formats
RDF/XML
N-Triples
N3
Turtle
RDF/XML
N-Triples
N3
Turtle
TriX
JSON for SPARQL
results
RDF/XML
N-Triples
Reasoning
Support
RDFS
OWL-Lite
DIG 1.1 Interface
RDFS
OWL-Lite
RDFS
OWL-Lite
RDF Server
SPARQL protocol
SPARQL protocol
+
Other
Features
 
 
Web-based Query UI
JENA Connectivity
Comments Joseki RDF Server
is a sperate download.
External
contributions
page.
Various extensions
availiable
New code fork
called Mulgara Project

 

 
KAON 1.2.9 KAON 2.0 JRDF 0.3.4.2
Latest Release
06/2005
06/2005
11/2005
Number of
Developers
12
?
4
Downloads
(01/2005)
14200
?
8200
Active
Mailing-List
-
-
-
License
LGPL
Commercial, free for
academic purposes
LGPL
API-
Paradigm

Statement-centric
Resource-centric
Ontology-centric

Ontology-centric

Statement-centric

Query-
Languages
-
Statement-centric
Model
Storage
Memory
DB
Memory
Memory
Supported
Databases

Any SQL2
compliant DB

-

-

Supported
Serialization
Formats
RDF/XML
?
Reasoning
Support
RDFS
OWL-Lite
OWL-Lite,
partial OWL-DL,
SWRL
-
RDF Server
+
+
-
Other
Features
 Several extensions
available
 
 
Comments Includes
KAON Portal;
See also KAON2
Reasoning based
on disjunctive datalog
 

 

 
Euler 1.5.7 OWLJessKB NG4J 0.5
Latest Release
03/2006
01/2005
10/2006
Number of
Developers
4
1
4
Downloads
(01/2005)
1037
?
?
Active
Mailing-List
-
+
+
License
W3C License
GPL
BSD
API-
Paradigm

Model-centric

Statement-centric
Ontology-centric

NamedGraph-centric
Triple-centric
Quad-centric
Statement-centric

Query-
Languages
N3QL
SPARQL
TriQL
Model
Storage
Memory

Memory

Memory
DB
Supported
Databases

-

-

MySQL,
PostgreSQL,
HSQLDB

Supported
Serialization
Formats
N3
RDF/XML
RDF/XML
N-Triples,
N3
TriX
TriG
Reasoning
Support
RDFS
OWL
RDFS
OWL-Lite
RDFS
OWL-Lite
RDF Server
-
-
-
Other
Features
 
 
Provenance-enabled
Jena statements;
See also
SemWeb Client Lib
Comments
Underlying
reasoner
is Jess 
Based on Jena

 

 
SOFA 0.3 YARS IBM IODT
Latest Release
03/2005
03/2006 6/2005
Number of
Developers
1
5 1
Downloads
(01/2005)
?
? ?
Active
Mailing-List
+
- +
License
LGPL
BSD ?
API-
Paradigm

Resource-centric
Ontology-centric

Model-centric Model-centric
Query-
Languages
-
N3QL SPARQL subset
Model
Storage
Memory
DB
Native
RDF Repository
Memory
DB
Supported
Databases

JDBC compliant DB

- DB2 and Derby
Supported
Serialization
Formats
RDF/XML
N3
N-Triples
RDF/XML
N-TRIPLE
N3
RDF/XML
Reasoning
Support
RDFS
- RDFS/OWL
RDF Server
-
+ -
Other
Features
 
 
Eclipse-based
ontology workbench  
Comments SOFA is
used by KOWARI
   

 

 
Boca Protégé OWL API Semantic Web
Client Library
Latest Release
1/2007
06/2005
12/2006
Number of
Developers
5
1
3
Downloads
(01/2005)
?
?
?
Active
Mailing-List
+
+
+
License
Eclipse Public
License
Mozilla
BSD
API-
Paradigm

NamedGraph-centric,
Statement-centric,
Resource-centric

Ontology-centric

Named Graph-centric
Triple-centric
Quad-centric
Statement-centric

Query-
Languages
SPARQL
?
SPARQL, find(SPO)
Model
Storage
DB
Memory
DB

Memory,
Web

Supported
Databases

IBM DB2, MySQL,
PostgreSQL,
HSQLDB,
Apache Derby

 

 

Supported
Serialization
Formats
RDF/XML,
Turtle, RDFa, Atom
RDF/XML
RDF/XMRDF/XML
N-Triples,
N3
TriX
TriG
Reasoning
Support
None, exerimental
support for
owl:sameAs,
rdfs:subClassOf,
rdfs:subPropertyOf
RDFS/OWL
-
RDF Server
SPARQL protocol,
Atom Publishing
Protocol,
direct SOAP API
-
-
Other
Features
Multi-user support,
access control,
versioning,
notification,
replication
 
 Represents the
Semantic
Web as a single
global graph 
Comments     Implements
Linked Data

 

2.4 JavaScript

 
AJAR RDF library Jibbering
rdf-parser 0.34
EulerMoz
Latest Release
01/2007
05/2006
01/2005
Number of
Developers
5
1
7
Downloads
(01/2005)
?
?
?
Active
Mailing-List
-
-
+
License
W3C License
Custom
Open Source
Mozilla,
W3C License
API-
Paradigm

Triple-centric

Statement-centric

Model-centric

Query-
Languages
SPARQL
-
-
Model
Storage
Memory,
Web
Memory
Memory
Supported
Databases

-

-

-

Supported
Serialization
Formats
RDF/XML
RDF/XML
N3
Reasoning
Support
Some smushing
rdfs:subProperty
owl:sameAs
RDFS
OWL
RDF Server
-
-
-
Other
Features
 
 
 
Comments

Used by Tabulator,
implements
Linked Data

Expected to work in
Adobe SVG Viewer,
Batik's Squiggle,
Internet Explorer 5.5+
and Mozilla Family,
Opera 8+ and
Safari browsers


 
SPARQL JavaScript Library AJAX Client for SPARQL
Latest Release 04/2006
05/2006
Number of
Developers
2
1
Downloads
?
?
Active
Mailing-List
-
-
License
BSD
?
API-
Paradigm
Solution Set

Solution Set

Query-
Languages
SPARQL
SPARQL
Model
Storage
-
-
Supported
Databases
-

-

Supported
Serialization
Formats
SPARQL
Query Results XML,
DAWG's result-set
vocabulary;
JSON
SPARQL
Query Results XML
Reasoning
Support
-
-
RDF Server
-
-
Other
Features
 
 
Comments
Tested with Firefox
and Internet Explorer

 

2.5 Common Lisp

 
Wilbur
Latest Release
9/2005
Number of
Developers
2
Downloads
(01/2005)
?
Active
Mailing-List
-
License
API-
Paradigm
Statement-centric
Resource-centric
Query-
Languages
Model
Storage
Memory
Supported
Databases

-

Supported
Serialization
Formats
RDF/XML
Reasoning
Support
RDFS
RDF Server
Other
Features
 
Comments SPARQL and URIQA
implementation by
Richard Newman

 

2.6 .Net/Mono

 
Drive 3.3 EulerSharp
1.1.33
Spiral
0.34
Latest Release
10/2003
03/2006
01/2006
Number of
Developers
1
4
2
Downloads
(01/2005)
?
1037 500
Active
Mailing-List
+
-
-
License
LGPL
W3C License
MIT License
API-
Paradigm
Statement-centric
Model-centric
Resource-centric
Ontology-centric
Query-
Languages
-
N3QL
-
Model
Storage
Memory
Memory
Memory
DB
Supported
Databases

-

-

MySQL

Supported
Serialization
Formats
RDF/XML
N3
N3
RDF/XML
N-Triples
Reasoning
Support
-
RDFS
OWL
RDFS
RDF Server
-
-
-
Other
Features
RDF toolbar for
Internet Explorer  
 
Built-in support for
FOAF, RSS and
RdfCal 
Comments Written in C# Written in C# Written in C#

 

 
SemWebLib 1.0 Thea-VBA

LinqToRdf 0.2

Latest Release
06/2007
6/2005
10/2007
Number of
Developers
1
1
1
Downloads
(09/2005)
?
60
~140
Active
Mailing-List
+
-

Not very active yet,
but there is one

License
GNU GPL

New
BSD License

API-
Paradigm
Statement-centric
Triple-centric

Model centric

Query-
Languages
SPARQL,
RSquery
-

LINQ

Model
Storage
Memory,
DB
Memory

Memory,
DB

Supported
Databases

MySQL,
PostgreSQL,
SQLite

-

MySQL,
PostgreSQL,
SQLite

Supported
Serialization
Formats
RDF/XML
N3, Turtle,
NTriples
RDF/XML

RDF/XML,
N3, Turtle,
NTriples

Reasoning
Support
RDFS,
general rule-based
inferencing
(Euler engine)
-

RDFS,
general rule-based
inferencing
(Euler engine)

RDF Server
SPARQL Protocol
-

SPARQL

Other
Features
Supports quads 
Native
MS-Excel interface 

Support for
.NET 3.5

Comments Written in C# Written in VBA

Written in C#

 

2.7 PERL

 
PerlRDF CARA
pre0.001
Latest Release
03/2006
03/2001
Number of
Developers
?
2
Downloads
(01/2005)
?
162
Active
Mailing-List
+
-
License
GPL, Mozilla
GPL
API-
Paradigm
Statement-centric
Resource-centric
Query-
Languages
Resource-centric
query language
-
Model
Storage
Memory
DB
File
Memory
Supported
Databases

PostgreSQL
Berkeley DB 1.x

-

Supported
Serialization
Formats
RDF/XML
N3
RDF/XML
N-Triples
Reasoning
Support
-
-
RDF Server
-
-
Other
Features
 
 
Comments RDQL and SPARQL
support through
RDF::Query
 

 

2.8 PHP

 
RAP 0.9.4 appmosphere
RDF classes
PEAR:RDF 0.1.0
Latest Release
6/2006
5/2006
09/2004
Number of
Developers
8
1
2
Downloads
(01/2006)
3950
?
400
Active
Mailing-List
+
-
-
License
LGPL
W3C license
LGPL
API-
Paradigm
Statement-centric
Resource-centric
Ontology-centric
Quad-centric
Statement-centric
Statement-centric
Query-
Languages
SPARQL
RDQL
SPARQL
RDQL
Model
Storage
Memory
DB
Memory
DB

Memory
DB

Supported
Databases

ADOdb compliant
databases (30+)

MySQL
PEAR:MDB
compliant RDBMS
Supported
Serialization
Formats
RDF/XML
N-Triples
N3
TriX
GRDDL
RSS/ATOM
RDF/XML parser,
N3 serializer,
JSON for SPARQL
results

RDF/XML
N-Triples
N3

Reasoning
Support
RDFS
some OWL Rules
-
-
RDF Server
SPARQL protocol
SPARQL protocol
-
Other
Features
GUI for managing
database-backed
RDF models,
graph visualizatin modul,
Client for remote
SPARQL endpoints  
 
 
Comments  
 
Based on RAP 0.8.1

 

 
PHPXML Classes 1.1
Latest Release
07/2002
Number of
Developers
1
Downloads
(01/2005)
?
Active
Mailing-List
-
License
GPL
API-
Paradigm
Model-centric
Query-
Languages
RDQL
Model
Storage

Memory
DB

Supported
Databases
MySQL
Supported
Serialization
Formats
RDF/XML
Reasoning
Support
-
RDF Server
-
Other
Features
 
Comments  

 

 

2.9 Pike

 
Pike 7.6
Latest Release
5/2004
Number of
Developers
?
Downloads
(01/2005)
?
Active
Mailing-List
+
License
GPL , LGPL and MPL
API-
Paradigm
Statement-centric
Resource-centric
Ontology-centric
Query-
Languages
?
Model
Storage
Memory
Supported
Databases
-
Supported
Serialization
Formats
RDF/XML
Reasoning
Support
-
RDF Server
-
Other
Features
Comments

 

2.10 Prolog

 
SWI-Prolog /
Semantic Web Lib
5.6
F-OWL 0.41
Latest Release
01/2007
07/2003
04/2006
Number of
Developers
1
1
1
Downloads
(01/2005)
?
622
?
Active
Mailing-List
+
-
-
License
LGPL
BSD
GPL
API-
Paradigm
Statement-centric
Ontology-centric
Model-centric
Ontology-centric
Query-
Languages

SPARQL
SeRQL

XSB
N3
?
Model
Storage
Memory
DB
XSB database
Memory
Supported
Databases

Berkeley DB

-

-

Supported
Serialization
Formats

RDF/XML
Turtle

RDF/XML
N3

RDF/XML
N3

Reasoning
Support
RDFS
OWL-Lite

RDFS
OWL-Light
some OWL-DL
some OWL-full

?

RDF Server
-
-
Other
Features
APIs for JAVA,
ODBC, etc
RDFS/OWL
visualisation tool
Java API
SQL to OWL
converter
Comments   Written in
XSBand flora 2
 

 

 
Semantic Web Client for SWI Prolog
Latest Release
01/2007
Number of
Developers
1
Downloads
(01/2005)
?
Active
Mailing-List
-
License
GPL
API-
Paradigm
Quad-centric
Query-
Languages
-
Model
Storage
Memory,
Web
Supported
Databases

?

Supported
Serialization
Formats

RDF/XML

Reasoning
Support
?
RDF Server
?
Other
Features
Implements
Linked Data

Comments Based on
SWI-Prolog

 

2.11 Python

 
RDFLib 2.3.1 Cwm 1.1 Pychinko 0.1
Latest Release
3/2006
10/2005 01/2005
Number of
Developers
12
7 3
Downloads
(01/2005)
?
? ?
Active
Mailing-List
+
+ -
License
Custom
Open Source
W3C Software
License
Custom
Open Source
API-
Paradigm
Statement-centric
Model-centric Model-centric
Statement-centric
Query-
Languages
SPARQL
N3 N3
Model
Storage
Memory
DB
Memory Memory
Supported
Databases

MySQL
Berkeley DB

- -
Supported
Serialization
Formats
RDF/XML
N-Triples
N3
RDF/A parser
RDF/XML
N3
N-Triples
N3
Reasoning
Support
-
Generic FOPL
forward reasoner
N3
RDFS
OWL
XSD
RDF Server
-
- -
Other
Features
TripleStore with
support for contexts
  Rete-based
Rule engine
Comments     Uses RDFLib+CWM

 

 
4Suite Sparta 0.8 Pyrple
Latest Release 12/2005
1/2005
06/2004
Number of
Developers
5
1
1
Downloads
(01/2005)
?
?
?
Active
Mailing-List
-
-
-
License
Apache Software
License
Custom
Open Source
?
API-
Paradigm
Statement-centric
Resource-centric
Statement-centric
Query-
Languages
Versa
-
N3
Model
Storage
Memory
DB
File

RdfLib
TripleStore

Memory
Supported
Databases
PostgreSQL
-
-
Supported
Serialization
Formats
RDF/XML
N-Triples
RDF/XML
N-Triples
RDF/XML
N3
N-Triples
Reasoning
Support
-
-
-
RDF Server
+
-
-
Other
Features
 

 
 
Comments  
Extension to
RDFLib
 

 

 
Metalog Eep3 Alpha
Latest Release 10/2003 07/2002
Number of
Developers
3 1
Downloads
(01/2005)
? ?
Active
Mailing-List
- -
License
W3C
License
GPL
API-
Paradigm
Statement-centric
Resource-centric
Statement-centric
Query-
Languages
MLL
PNL
N3
Model
Storage
Memory
File
Memory
Supported
Databases
- -
Supported
Serialization
Formats
RDF/XML
N-Triples
RDF/XML
N3
N-Triples
Reasoning
Support
Prolog Reasoning -
RDF Server
- -
Other
Features
User-friendly Pseudo
Natural Language
interface
 
Comments Uses SWI-Prolog  

 

2.12 Ruby

 
ActiveRDF
Rena 0.0.4
Samizdat 0.5.4
Latest Release 03/2006 07/2004 10/2004
Number of
Developers
2 1 2
Downloads
(01/2005)
? ? ?
Active
Mailing-List
+ - -
License
GPL Ruby GPL
API-
Paradigm
Direct mapping of
RDF resources
to Ruby objects
Statement-centric
Resource-centric
Resource-centric
Query-
Languages
- Some RDQL Squish
Model
Storage
Memory Memory DB
Supported
Databases
YARS
Redland
- PostgreSQL
Supported
Serialization
Formats
RDF/XML RDF/XML
N-Triples
-
Reasoning
Support
- - -
RDF Server
- - -
Other
Features
     
Comments Designed for
Ruby-on-Rails
   

 
RubyRDF
Latest Release 04/2003 ?
Number of
Developers
1
Downloads
(01/2005)
?
Active
Mailing-List
-
License
W3C
API-
Paradigm
Model-centric
Query-
Languages
Squish
Model
Storage
DB
Supported
Databases
PostgreSQL
MySQL
Supported
Serialization
Formats
RDF/XML
N-Triples
Reasoning
Support
-
RDF Server
-
Other
Features
 
Comments No longer under
active development

 

2.13 Proprietary Languages

 
Fabl
2.0.9
Adenine
Latest Release 10/2004 12/2004
Number of
Developers
1 7
Downloads
(01/2005)
? ?
Active
Mailing-List
+ -
License
? BSD-style
API-
Paradigm
RDF-centric
Programming
Language
RDF-centric
Programming
Language
Query-
Languages
  Adenine
Model
Storage
Memory
File
Memory
DB
Supported
Databases
- ?
Supported
Serialization
Formats
RDF/XML
N-Triples
Turtle
Adenine
RDF/XML
Reasoning
Support
   
RDF Server
- -
Other
Features
   
Comments Paper about Fabl Part of Haystack

 

2.14 Commercial Toolkits

 
Intellidimension
RDF Gateway
2.3.3
Oracle RDF Data Model
OpenLink
Virtuoso
Latest Release 04/2006 09/2005 4/2006
Number of
Developers
2 - 10+
Downloads
(01/2005)
? - -
Active
Mailing-List
+ + -
License
Commercial License;
Free for
personal use
Commercial License;
Free for
development use
Commercial License;
Restricted
Open Source License
API-
Paradigm
Model-centric
Statement-centric
Resource-centric
Statement-centric Query-centric
Query-
Languages
SPARQL
RDFQL
SPARQL-like
query language
SPARQL
Model
Storage
Memory
DB
File
Database Native
RDF Repository,
Database
Supported
Databases
All OleDB compliant Oracle Database JDBC/ODBC
Supported
Serialization
Formats
RDF/XML
N3
N-Triples
Turtle
N-Triples RDF/XML, RSS,
ATOM, GData,
SPARQL-P
Reasoning
Support
RDFS
OWL
Custom Rules
RDFS
SWRL-like rules
-
RDF Server
+ + SPARQL protocol and
SIMILE Semantic
Bank API
Other
Features
Development tools,
integrated with win
security, web-based
administration,
federated queries
across internal and
external data sources
Java API,
Integrated with other
database functionality,
e.g. security,
high availability.
A lot, see.
Comments     Supports RDF
mapping of
legacy databases

 

 


3. Comparison Criteria

This chapter explains the comparison criteria.

Latest Release

Publication date of the current release of the toolkit. If you know about a new release of any toolkit with new features, please let us know.

Number of Developers

Number of persons involved in developing and maintaining the toolkit. If the toolkit is hosted on Sourceforge, we took the number of developers listed there. Otherwise we counted everybody mentioned as developers on the project website. This figure might be misleading if a project consists of many developers who only contribute occationally.

Downloads

Total number of downloads until January 2005. If the toolkit is hosted on Sourceforge, we took the download figure listed there. If the toolkit is part of another toolkit for a different purpose (like a general XML toolkit), then we didn't use the download figure, because it doesn't reflect the demand for the actual Semantic Web toolkit. If a tool kit consists of several packages which have to be downloaded separately, we also didn't use this download figure.

Active Mailing-List

Indicator if the project has an active support mailing list. We counted a mailing-list as active if there were more than ten posts in the last three months.

License

License under which the toolkit is distributed.

API-Paradigm

This criteria describes which general API-Paradigms are offered for manipulating RDF data.

Query-Languages

List of all RDF query languages supported by the toolkit. A comparison of different Semantic Web query languages is found here. Support for SPARQL means that the toolkit supports at least some features of the standard RDF query language currently developed by DAWG.

Model Storage

List of stoage alternatives for RDF data. Possible values are

A scalability report on triple store applications has been published by the MIT Simile Project. The SWAD-Europe has also published a report about Open Source RDF storage systems.

Supported Databases

List of supported databases or name of the database abstraction layer used.

Supported Serialization Formats

Supported serialization formats for reading and writing RDF models. An overview about different RDF serialization formats is found here. Information about GRDDL is found here. A comparison how different toolkits handle the W3C RDF Test Cases is found here.

Reasoning Support

Ontology-languages supported by the toolkit to infer implicit statements. A language is already listed if most of the inference rules of the language are supported by the toolkit. A comparison how different toolkits handle the W3C OWL Test Cases is found here.

RDF Server

Indicator if the toolkit contains some kind of RDF server, which allows models to be queried over the web using HTTP or SOAP. For more information about RDF servers and data access protocols see W3C DAWG work on protocols.

Other Features

Additional features of the toolkit that aren't captured by other criteria.

Comments

Further comments on the toolkit.


4. Change Log