BibSonomy publications for /user/a_olympia/metadataSat Aug 18 13:22:24 CEST 2007OAI-P2P: A Peer-to-Peer Network for Open Archives2002content metadata oai open OAI is designed with a low-barrier technology approach, thus allowing institutions to provide content metadata with little effort. On the other hand, search capabilities are very limited on OAI data providers, and have to be provided by separate service providers. We propose that data providers form a peer-to-peer network which supports distributed search over all connected metadata repositories. Such an approach is already implemented for learning content metadata (project 'Edutella'). We...Sat Aug 18 13:22:24 CEST 2007Serials Review2156--158The Open Archives Initiative282002archive metadata open initiative oai This article describes the Open Archives Initiative (OAI), an initiative that is developing mechanisms for accessing and sharing metadata and for facilitating the development of services that can be built using that shared metadata. Serials Review 2002; 28:156-158.Sat Aug 18 13:22:24 CEST 2007New York, NY, USAJCDL '07: Proceedings of the 2007 conference on Digital libraries366--375Subject metadata enrichment using statistical topic models2007metadata Creating a collection of metadata records from disparate and diverse sources often results in uneven, unreliable and variable quality subject metadata. Having uniform, consistent and enriched subject metadata allows users to more easily discover material, browse the collection, and limit keyword search results by subject. We demonstrate how statistical topic models are useful for subject metadata enrichment. We describe some of the challenges of metadata enrichment on a huge scale (10 million metadata records from 700 repositories in the OAIster Digital Library) when the metadata is highly heterogeneous (metadata about images and text, and both cultural heritage material and scientific literature). We show how to improve the quality of the enriched metadata, using both manual and statistical modeling techniques. Finally, we discuss some of the challenges of the production environment, and demonstrate the value of the enriched metadata in a prototype portal.