RDFStore

Date:      Thu, 02 Nov 2000 05:19:23 +0100
From:      "Alberto Reggiori (vaio)" <alberto.reggiori@jrc.it>
To:        RDF Interest Group <www-rdf-interest@w3.org>
Subject:   ANNOUNCEMENT: RDFStore

RDFStore is a set of Perl modules to manage Resource Description Framework (RDF) model databases in a easy and straightforward way. It is a pure Perl implementation of the Draft Java API from the Stanford University DataBase Group by Sergey Melnik [1] with some additional cool modules to read/write RDF triples directly from the Perl langauge environment.

By using the Perl TIE interface, a generic application script can access RDF triplets using normal key/value hashes; the storage can happen either in-memory data structures or on the local filesystem by using the DB_File.pm or BerkeleyDB.pm modules.

An experimental remote storage service is also provided using a custom DBMS.pm module coupled with a fast and performant TCP/IP deamon. The deamon has been written entirely in the C language and is actually storing the data in Berkeley DB v1.x files; such a software is similar to the rdfbd approach from Guha [2].

The input RDF files are being parsed and processed by using a streaming SiRPAC like parser completely written in Perl. Such an implementation includes most of the proposed bug fixes and updates as suggested on the W3C RDF-interest-Group mailing list and http://www.w3.org/RDF/Implementations/SiRPAC/SiRPAC-defects.html and http://www.w3.org/2000/03/rdf-tracking/ (but yes most of them are still there :-) A strawman parser for a simplified syntax proposed by Jonathan Borden, Jason Diamond's and Dan Connolly [3][4][5] is also included. By using the Sablotron XSLT engine is then possible to easily tranform XML documents to RDF and query them from the Perl language.

Features

Modular interface using packages
Perl-way API to fetch, parse, process, store and query RDF models
W3C RDF and strawman syntax parsing
Perl TIE seamless access to RDF triplet databases
Either DB_File and BerkeleyDB support
Automatic Vocabulary generation
Basic RDF Schema support
Initial TCP/IP remote storage service support

Download

http://xml.jrc.it/RDFStore/RDFStore-0.1.tar.gz
ftp://mda02.jrc.it/incoming/RDFStore/RDFStore-0.1.tar.gz.

In the next few days I will try to upload it to CPAN.

...and do not blame me too much, this is only version 0.1 ;-)

have fun!

Alberto

[0] http://www.mailbase.ac.uk/lists/rdf-dev/1999-06/0002.html The RADIX proposal by Ron Daniel
[1] http://www-db.stanford.edu/~melnik/rdf/api.html
[2] http://web1.guha.com/rdfdb/
[3] http://www.openhealth.org/RDF/rdf_Syntax_and_Names.htm
[4] http://www.injektilo.org/rdf/rdf.xsl
[5] http://www.w3.org/XML/2000/04rdf-parse/rdfp.xsl

Prepared by Robin Cover for The XML Cover Pages archive. See "Resource Description Framework (RDF)."

SEARCH Advanced Search ABOUT Site Map CP RSS Channel Contact Us Sponsoring CP About Our Sponsors NEWS Cover Stories Articles & Papers Press Releases CORE STANDARDS XML SGML Schemas XSL/XSLT/XPath XLink XML Query CSS SVG TECHNOLOGY REPORTS XML Applications General Apps Government Apps Academic Apps EVENTS LIBRARY Introductions FAQs Bibliography Technology and Society Semantics Tech Topics Software Related Standards Historic	RDFStore Date: Thu, 02 Nov 2000 05:19:23 +0100 From: "Alberto Reggiori (vaio)" <alberto.reggiori@jrc.it> To: RDF Interest Group <www-rdf-interest@w3.org> Subject: ANNOUNCEMENT: RDFStore RDFStore is a set of Perl modules to manage Resource Description Framework (RDF) model databases in a easy and straightforward way. It is a pure Perl implementation of the Draft Java API from the Stanford University DataBase Group by Sergey Melnik [1] with some additional cool modules to read/write RDF triples directly from the Perl langauge environment. By using the Perl TIE interface, a generic application script can access RDF triplets using normal key/value hashes; the storage can happen either in-memory data structures or on the local filesystem by using the DB_File.pm or BerkeleyDB.pm modules. An experimental remote storage service is also provided using a custom DBMS.pm module coupled with a fast and performant TCP/IP deamon. The deamon has been written entirely in the C language and is actually storing the data in Berkeley DB v1.x files; such a software is similar to the rdfbd approach from Guha [2]. The input RDF files are being parsed and processed by using a streaming SiRPAC like parser completely written in Perl. Such an implementation includes most of the proposed bug fixes and updates as suggested on the W3C RDF-interest-Group mailing list and http://www.w3.org/RDF/Implementations/SiRPAC/SiRPAC-defects.html and http://www.w3.org/2000/03/rdf-tracking/ (but yes most of them are still there :-) A strawman parser for a simplified syntax proposed by Jonathan Borden, Jason Diamond's and Dan Connolly [3][4][5] is also included. By using the Sablotron XSLT engine is then possible to easily tranform XML documents to RDF and query them from the Perl language. Features Modular interface using packages Perl-way API to fetch, parse, process, store and query RDF models W3C RDF and strawman syntax parsing Perl TIE seamless access to RDF triplet databases Either DB_File and BerkeleyDB support Automatic Vocabulary generation Basic RDF Schema support Initial TCP/IP remote storage service support Download http://xml.jrc.it/RDFStore/RDFStore-0.1.tar.gz ftp://mda02.jrc.it/incoming/RDFStore/RDFStore-0.1.tar.gz. In the next few days I will try to upload it to CPAN. ...and do not blame me too much, this is only version 0.1 ;-) have fun! Alberto [0] http://www.mailbase.ac.uk/lists/rdf-dev/1999-06/0002.html The RADIX proposal by Ron Daniel [1] http://www-db.stanford.edu/~melnik/rdf/api.html [2] http://web1.guha.com/rdfdb/ [3] http://www.openhealth.org/RDF/rdf_Syntax_and_Names.htm [4] http://www.injektilo.org/rdf/rdf.xsl [5] http://www.w3.org/XML/2000/04rdf-parse/rdfp.xsl Prepared by Robin Cover for The XML Cover Pages archive. See "Resource Description Framework (RDF)."