Installation

This wiki pages describes how to integrate the SPARQL Backend into an Open LDAP Server and how to configure the SPARQL Endpoint and mappings.

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

After that, you need a copy of the RAP API in your api directory:
cd /path/to/backend cvs -z3 -d:pserver:anonymous@rdfapi-php.cvs.sf.net:/cvsroot/rdfapi-php co -P rdfapi-php/api mv rdfapi-php/api api rm -rf rdfapi-php

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 "/path/to/backend/shell.php" #subordinate

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...