AKSW - Projects/LDAP/Backend

2007-06-06 15:43:04

Comparison for /Projects / LDAP / Backend of 2007-06-06 15:43:04 and 2007-06-06 15:45:29

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<p><a class="bigbutton" href="http://sourceforge.net/project/showfiles.php?group_id=168633">Download LDAP 2 SPARQL 0.2</a></p>

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<p><a class="bigbutton" href="http://sourceforge.net/project/showfiles.php?group_id=99425&package_id=116133">Download LDAP 2 SPARQL 0.2</a></p>

2007-06-06 15:42:52

Comparison for /Projects / LDAP / Backend of 2007-06-06 15:42:52 and 2007-06-06 15:43:04

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Triple-I 2007 in Graz
Today is the second day of the Triple-I Conference in Graz / Austria. Thomas presented the SWORE Ontology for Requirements Engineering which is part of our Softwiki project and I will present the LDAP 2 SPARQL project tomorrow. Graz is really a nice city with many cultural places of interest and a great old city center [...]

LDAP 2 SPARQL: Accessing RDF Knowledge Bases via LDAP Clients
In order to exploit the client support of LDAP directories with the semantic expressivity of RDF knowledge bases, we aim at integrating RDF knowledge bases into LDAP directory services. LDAP 2 SPARQL is a Backend to the widely used OpenLDAP server. It translates LDAP queries into SPARQL queries, asks a SPARQL endpoint and translates the result [...]

Deletions:

OntoWiki 0.8.6 released
This is a bugfix release with minor enhancements. We fixed some issues from the user community. The most important enhancement is the support for HTTPS now. For a list of all issues, have a look at the Changelog.

OntoWiki 0.8.5 released
The AKSW research group is pleased to announce that OntoWiki 0.8.5 is now available for download. Changes in this release include A plug-in and event architecture A file / document manager Rest webservices for login / query / export databases WebDAV support for browsing and exporting resources A new JSON exporter that uses the RDF JSON specification draft from talis New [...]

2007-06-06 15:27:11

Comparison for /Projects / LDAP / Backend of 2007-06-06 15:27:11 and 2007-06-06 15:42:52

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News

Introduction

Publications

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Introduction

Publications

2007-06-06 15:15:13

Comparison for /Projects / LDAP / Backend of 2007-06-06 15:15:13 and 2007-06-06 15:27:11

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Contents

Installation

Download

For now you have to download the backend from our subversion repository:
svn co https://powl.svn.sourceforge.net/svnroot/powl/trunk/ldap2sparql /path/to/backend

Configuration

External Endpoint and pre-mapped data

This example.ini uses a local Joseki 3.0 to query an RDF document with pre-mapped ldap data:

[SPARQL_ENDPOINT]
server = localhost:2020/sparql
defaultgraph = file:/path/to/backend/data/ldap.rdf 
[NAMESPACES]
rdf = http://www.w3.org/1999/02/22-rdf-syntax-ns#
ldap = http://purl.org/net/ldap#
rdfs = http://www.w3.org/2000/01/rdf-schema#
foaf = http://xmlns.com/foaf/0.1/
data = ldap://example.com/people/
[MAPPING]
mapping = external

External endpoint and on-the-fly mapping

This example uses a local Joseki 3.0 to query an RDF document with data from the SWRC namepspace. The data is mapped top inetOrgPerson according to the mapping file.

[SPARQL_ENDPOINT]
server = localhost:2020/sparql
defaultgraph = file:/path/to/conferences.rdf
[NAMESPACES]
rdf = http://www.w3.org/1999/02/22-rdf-syntax-ns#
ldap = http://purl.org/net/ldap#
rdfs = http://www.w3.org/2000/01/rdf-schema#
foaf = http://xmlns.com/foaf/0.1/
swrc = http://swrc.ontoware.org/ontology#
conf = http://3ba.se/conferences/
[MAPPING]
mapping = internal
mapping_file = mapping_swrc.ini
base = "ou=people,dc=localdomain"

Here is the mapping file mapping_swrc.ini:

[OBJECTS&ATTRIBUTES]
inetOrgPerson = swrc:Person
organizationalPerson = swrc:Person
cn = rdfs:label
sn = swrc:lastName
telephoneNumber = swrc:phone
mail = swrc:email
objectClass = rdf:type
l = conf:country
[inetOrgPerson]
dnName = cn
dnValue = cn
dnFunction = plain

Onto Wiki backend-ed and on-the-fly mapping

...soon...

Server Integration

The SPARQL Backend uses the shell backend extension so you need to load the shell backend module in /etc/ldap/slapd.conf.

moduleload      back_shell

An example slapd.conf configuration snippet is listed here:

### LDAP2SPARQL Shell Backend ###
database        shell
suffix  "ou=ldap2sparql,dc=localdomain"
search  "/usr/bin/php5 /path/to/backend/shell.php /path/to/backend/ini/example.ini"
subordinate

2007-06-06 15:08:22

Comparison for /Projects / LDAP / Backend of 2007-06-06 15:08:22 and 2007-06-06 15:15:13

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Contents

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Contents

2007-05-31 23:53:27

Comparison for /Projects / LDAP / Backend of 2007-05-31 23:53:27 and 2007-06-06 15:08:22

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</div>

2007-05-31 23:48:47

Comparison for /Projects / LDAP / Backend of 2007-05-31 23:48:47 and 2007-05-31 23:53:27

Additions:

In order to exploit the client support of LDAP directories with the semantic expressivity of RDF knowledge bases, we aim at integrating RDF knowledge bases into LDAP directory services. The ultimate goal is to use standard LDAP clients such as e-mail and address book software as well as software relying on LDAP authentication with RDF knowledge bases as backends.

Deletions:

In order to exploit the client support of LDAP directories with the semantic expressivity of RDF knowledge bases, we aim at integrating RDF knowledge bases into LDAP directory services.
The ultimate goal is to use standard LDAP clients such as e-mail and address book software as well as software relying on LDAP authentication with RDF knowledge bases as backends.

2007-05-31 23:47:28

Comparison for /Projects / LDAP / Backend of 2007-05-31 23:47:28 and 2007-05-31 23:48:47

Additions:

In order to exploit the client support of LDAP directories with the semantic expressivity of RDF knowledge bases, we aim at integrating RDF knowledge bases into LDAP directory services.
The ultimate goal is to use standard LDAP clients such as e-mail and address book software as well as software relying on LDAP authentication with RDF knowledge bases as backends.

2007-05-31 23:46:49

Comparison for /Projects / LDAP / Backend of 2007-05-31 23:46:49 and 2007-05-31 23:47:28

Additions:

<p>LDAP 2 SPARQL is a Backend to the widely used <a href="http://www.openldap.org">OpenLDAP</a> server. It translates LDAP queries into SPARQL queries, asks a SPARQL endpoint and translates the result back to LDIF.</p>

Deletions:

<p>LDAP 2 SPARQL is a Backend to the widely used <a href="http://www.openldap.org">OpenLDAP</a> server. It translates LDAP query into SPARQL queries, asks a SPARQL endpoint and translates the result back to LDIF.</p>