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Maria Teresa Biagetti

Maria Teresa Biagetti. ISKO Italia – Firenze 20.05.2013. DIPARTIMENTO DI SCIENZE DOCUMENTARIE LINGUISTICO-FILOLOGICHE E GEOGRAFICHE. Modalità di ricerca semantica nelle Biblioteche digitali. DELOS Digital Library Reference Model.

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Maria Teresa Biagetti

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  1. Maria Teresa Biagetti ISKO Italia – Firenze 20.05.2013 DIPARTIMENTO DI SCIENZE DOCUMENTARIE LINGUISTICO-FILOLOGICHE E GEOGRAFICHE Modalità di ricerca semantica nelle Biblioteche digitali

  2. Modalità di ricerca semantica nelle Biblioteche digitali

  3. DELOS Digital Library Reference Model Sixth Framework Programme (2002-2006) Information Society Technologies (IST) 2008: DL.org, Commissione dell'Unione Europea, 7th Framework Programme (FP7). Digital Libraries (DL) Digital Library Systems (DLS) Digital Library Management Systems (DLMS) Aree concettuali di cui si compone una Digital library: • Contents, • Users (humans or machines), • Functionalities, • Quality levels, • Policy rules (rules on the management of rights and DRM, rules about privacy) • Architecture of DLS. Modalità di ricerca semantica nelle Biblioteche digitali

  4. Le funzionalità per la ricerca presentate nel DELOS Model "C30 Functionality Domain Definition:One of the six main concepts characterising the Digital Library universe. It represents the various aspects related to the modelling of facilities/services provided in the Digital Library universe to serve Actor needs [...].Rationale: The Functionality Domain concept represents the services that Digital Libraries offer to their Actors. The set of facilities expected from Digital Libraries is extremely broad and varies according to the application context. There are a number of Functions that Actors expect from each Digital Library, e.g. search, browse, information objects visualisation. Beyond that, any Digital Library offers additional Functions to serve the specific needs of its community of users.“ (DELOS Network of Excellence on Digital Libraries: The DELOS Digital Library Reference Model. Foundations for Digital Libraries. Version 0.98. Candela, L. [et al.] (eds.), (2007), pp. 90-91.http://www.delos.info/files/pdf/ReferenceModel/DELOS_DLReferenceModel_0.98.pdf) • Ricerca attraverso i metadati • Ricerca per parole chiave, combinate attraverso operatori booleani • Vector Space Model • Relevance feedback Modalità di ricerca semantica nelle Biblioteche digitali

  5. Le funzionalità per la ricerca presentate nel DELOS Model "Moreover, an important characteristic of the Search functionality lies in which model is adopted in identifying the pertinence of the objects with respect to a query, e.g. the Boolean model or the vector-space model." DELOS Network of Excellence on Digital Libraries: The DELOS Digital Library Reference Model. Foundations for Digital Libraries. Version 0.98. Candela, L. [et al.] (eds.), (2007), p. 93 http://www.delos.info/files/pdf/ReferenceModel/DELOS_DLReferenceModel_0.98.pdf Vector Space Model (Gerard Salton) TF-IDF (Term Frequency-Inverse Document Frequency)(Karen Spärck Jones) Modalità di ricerca semantica nelle Biblioteche digitali

  6. Le “Biblioteche digitali semantiche” Semantic Web Social Networking Indicizzazione: • KOS (Knowledge Organization Systems) Folksonomies e Sistemi di tagging Annotazioni • Ontologie bibliografiche: es. MarcOnt Ontology Funzioni di ricerca: • Analisi del full-text • Espansione delle queries basate su Social collaborative filtering: es. FOAF • Profili degli utenti e Recommendation Systems Modalità di ricerca semantica nelle Biblioteche digitali

  7. Le “Biblioteche digitali semantiche” Alcuni software permettono: • Servizio di alerting tra federated servers • Applicazione del modello FRBR Es.: http://www.greenstone.org/.Greenstone Version 3 Potenziamento semantico interessante, ma troppo modesto… (Approfondimenti e dettagli in un prossimo articolo) Grazie per l’attenzione mariateresa.biagetti@uniroma1.it Modalità di ricerca semantica nelle Biblioteche digitali

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