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Semantic User Profiles Ancuta Ionel, Sorin Alexandru Damian Abstract. This paper describes how the application associated with it works, from the premises from which the authors started, the techniques they applied and ending the results obtained in specifying from a semantic point of view a profile belonging to an user from Faculty of Computer Science Iasi. It also describes security issues that can appear and how they could be overcome. A summary of programming techniques are presented and applied in the study case - the application that completes the paper. Keywords: SPARQL endpoint, RDFa, DCMI, FOAF, semantic web Introduction Exposing profile information for all the Faculty of Computer Science accounts in a machine readable format like RDF XML requires gathering information from multiple systems. The application is based on information already available to all faculty members. The data sources used are the /etc/passwd file on the students’ server that offers basic information about the account on the server. Detailed information regarding the LDAP accounts is not directly available. This information was gathered using the People Search application at http://students.info.uaic.ro/people . This application provides both html and xml output. The xml was parsed and cached locally in order to build a triple store that can be queried with SPARQL. Implementation The application that exposes the SPARQL endpoint and the RDFa annotated profile information is build using ASP.net MVC for the front end and uses the SEMWEB library to provide a triple store, RDF/XML serialization and the SPARQL query engine. Input data is gathered by parsing a classic unix passwd file to get all the user account and by crawling the HTML or the XML from the People Search application at http://students.info.uaic.ro/people  All profile information is linked to the user identity using RDF triples and stored into a local database for later queries. Let’s say that the profile of the user “sorin.damian” is crawled and needs to be stored.  For all the profile properties we generate and store triples like: ,[object Object]
Wade.Semantic User Profiles
Wade.Semantic User Profiles
Wade.Semantic User Profiles
Wade.Semantic User Profiles
Wade.Semantic User Profiles
Wade.Semantic User Profiles

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Wade.Semantic User Profiles

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