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

Additions:

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

Deletions:

<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

Additions:

2 PhD and 1 PostDoc Position at Business School of Bern University of Applied Sciences
For collaborative international research projects in the area of intelligent information management, the Business School of Bern University of Applied Sciences (BUAS) in cooperation with research group Agile Knowledge Engineering and Semantic Web (AKSW) at Universit�t Leipzig opens positions for: 2 PhD and 1 PostDoc Position in Knowledge Engineering / Semantic Web The positions are [...]

AKSW tools prominently featured in T�B?TAK
B�rtecin Ege wrote an article on the Semantic Web in the December issue of T�B?TAK (The Scientific and Technological Research Council of Turkey) prominently featuring DBpedia, Relfinder, LIMES, SPARQL Benchmark and other AKSW related research projects. See Semantik Web T�bitak Bilim Teknik 12 2011.

Deletions:

Deutsche Biographie becomes part of the LOD cloud
During a workshop on June 27th at the Historical College in Munich, the AKSW group and the group of the New German Biography at the Bavarian Academy of Sciences and Humanities presented their results of the LOD2-supported PUBLINK project. Within this project meta-data about 46,000 biographies, 42,000 people and 12,000 locations were made available as [...]

AKSW at TU Dresden PLT
On June 8, I (Jens) visited the process control engineering research group (PLT) of Leon Urbas at the Dresden University of Technology. We first met on the Leipziger Semantic Web Day where Leon Urbas presented interactive Linked Data applications and decided to have a longer meeting later on. I first gave a talk on the [...]

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

Deletions:

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>