Group items tagged

"Contrairement aux moteurs de recherche fédérée, Summon s'appuie sur un index unique, constamment mis à jour, qui contient les méta-données des ressources que propose la bibliothèque, ce qui garantirait un temps de réponse plus court. Concernant l'affichage des résultats, il se fait « selon leur pertinence », sans que l'on puisse savoir sur quoi cette pertinence est basée. Il semble cependant que l'algorithme traite principalement les métadonnées des notices plutôt que celles du texte intégral pour ne pas générer de bruit. Les résultats sont proposés sous la forme d'un affichage à facettes, avec des possibilités pour affiner sa recherche (tri par contenu, par date, par bibliothèque…), et un fil RSS est proposé sur les résultats de la recherche. Summon est construit sur une architecture logicielle « libre » (Lucene). Rien n'est à installer « en dur » localement, tout est hébergé sur les serveurs de SerialsSolutions (Seattle, WA). Summon bénéficie de la puissance de feu de ProQuest-CSA (métadonnées de Ulrich's) et a passé des accords avec de nombreux éditeurs pour proposer aujourd'hui un index riche de plus de 500 millions de documents indexés, provenant de plus de 70 000 périodiques et plus de 100 fournisseurs de contenus dans sa base de connaissance. L'interrogation des bases d'archives ouvertes est possible."

"Abrégée en RI ou IR (Information Retrieval en anglais), la recherche d'information est la science qui consiste à rechercher l'information dans des documents - les documents eux-mêmes ou les métadonnées qui décrivent les documents -, dans des bases de données - qu'elles soient relationnelles ou mises en réseau par des liens hypertexte comme dans le World Wide Web, l'internet, et les intranets, pour le texte, le son, les images, les données."

«Comparativement au premier catalogue Ariane, il est certain qu'Ariane 2.0 offre de plus grandes possibilités, explique Guy Teasdale, directeur de la bibliothèque numérique et des technologies de l'information à la Bibliothèque. En implantant Ariane 2.0, nous cherchions à recréer l'interface extrêmement dépouillée de Google, tout en exploitant la richesse et l'intelligence des métadonnées enfouies dans les quelque 1, 7 millions de notices bibliographiques de notre catalogue. Les avantages de cette nouvelle interface sont tangibles, la plus évidente étant la recherche par facettes. Il y a aussi la possibilité de mieux exploiter la puissance du répertoire des vedettes matières de l'Université Laval (RVM). Toute l'opération s'inscrit dans notre volonté des nous adapter à la réalité des étudiants habitués aux moteurs de recherche de plus en plus puissants et conviviaux.»

"Le protocole d'échange de métadonnées SRU (Search/Retrieval via URL) est l'équivalent fonctionnel du protocole Z39.50 en s'adaptant aux standards technologiques du web (protocole http et format xml). "

"The Web puzzle of online information resources often hinders end-users from effective and efficient access to these resources. Clustering resources into appropriate subject-based groupings may help alleviate these difficulties, but will it work with heterogeneous material? The University of Michigan and the University of California Irvine joined forces to test automatically enhancing metadata records using the Topic Modeling algorithm on the varied OAIster corpus. We created labels for the resulting clusters of metadata records, matched the clusters to an in-house classification system, and developed a prototype that would showcase methods for search and retrieval using the enhanced records. Results indicated that while the algorithm was somewhat time-intensive to run and using a local classification scheme had its drawbacks, precise clustering of records was achieved and the prototype interface proved that faceted classification could be powerful in helping end-users find resources. "

"The change that libraries will need to make in response must include the transformation of the library's public catalog from a stand-alone database of bibliographic records to a highly hyperlinked data set that can interact with information resources on the World Wide Web. The library data can then be integrated into the virtual working spaces of the users served by the library. If all of this sounds otherworldly and vague, it is because there is no specific vision of where these changes will lead us. The crystal ball is unfortunately shortsighted, in no small part because this is a time of rapid change in many aspects of the information ecology. The few things that are certain, however, point to the Web, and its eventual successors, as the place to be. For libraries, this means yet another evolutionary step in the library of our catalog: from metadata to metaDATA."

"Library data has been designed to be read and interpreted by librarians and users. Although there are some controlled data fields, most of what is in the library catalog entry is text. The machine as user has not gotten a great deal of attention in the library cataloging environment. Now there's yet another potential user of library data, and that user is the Web and services that function on the Web. (...) This issue of Library Technology Reports provides an explanation, using concrete models and real-world examples, of how to facilitate this transformation."

"One of the topics of discussion at last week's Summon Advisory Board was the status of de-duping records returned by Summon. On the face of it it seems to be a simple issue - if the titles and authors match, throw the duplicate records out and you're good to go. The Summon technical team explained why it's a little harder than that though. "

"Web Single Sign-On Metadata Exchange Protocol is a Web Services and Federated identity specification, published by Microsoft and Sun Microsystems that defines mechanisms for a service to query an identity provider for metadata concerning the protocol suites it supports. The goal of this operation is to increase the ability of a given service to interoperate with a given identity provider.1"

- To Fix A Leaky Sink: Envisioning The Potential of Discovery Layers - LENS: Catalog Records and Additional Data Sources in the Aquabrowser Implementation at the University of Chicago - Automated Metadata Repurposing Using eXtensible Catalog Software - Equality of Retrieval: Leveling the Metadata Playing Field in Big Indexes

"The University of Calgary's Libraries and Cultural Resources became a beta partner with Serials Solutions' unified discovery service, Summon, in the spring of 2009. Since then it has worked to include metadata from numerous disparate systems in a single index to drive discovery in a Google-like environment. The University of Calgary has examined how MARC and other metadata schemas are mapped into Summon with an eye to ensuring the maximum possible population of index fields representing facets in addition to adhering to the established standards for cross mapping metadata schemas and indexing. The University of Calgary has investigated existing standards and worked closely with the Summon team to create mappings that reflect how MARC and other metadata can ultimately be used in big indexes. Combined with the normalization or collapsing of metadata records representing the same resource into a single metadata-rich record, fully leveraging MARC and other metadata in big indexes should not only level the metadata playing field but make competition between records a non-issue."