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Towards a combined model for search and navigation of annotated documents

Documents whose textual content is complemented with annotations of one kind or another are ubiquitous. Examples include biomedical documents (annotated with MeSH terms) and news articles (annotated with IPTC terms). Such annotations—or concepts—have typically been used for query expansion, to suggest alternative or related query formulations, and to facilitate browsing…
mathematics

Parsimonious Relevance Models

Relevance feedback is often applied to better capture a user’s information need. Automatically reformulating queries (or blind relevance feedback) entails looking at the terms in some set of (pseudo-)relevant documents and selecting the most informative ones with respect to the set or the collection. These terms may then be reweighed…
concepts

Parsimonious concept modeling

In many collections, documents are annotated using concepts from a structured knowledge source such as an ontology or thesaurus. Examples include the news domain, where each news item is categorized according to the nature of the event that took place, and Wikipedia, with its per-article categories. These categorizing systems originally…