Queries to search engines on the Web are usually short. They do not provide sufficient indications for an effective selection of relevant documents. Previous research has proposed the utilization of query expansion to deal with this problem. However, expansion terms are determined only on the analysis of documents. In this study, we propose a new method for query expansion based on user interac...

Compounds constitute a specific issue in search, in particular in languages where they are written in one word, as is the case for Danish and the other Scandinavian languages. For such languages, expansion of the query compound into separate lemmas is a way of finding the often frequent alternative synonymous phrases in which the content of a compound can also be expressed. However, it is cruci...

1. NEED OF QUERY EXPANSION The Information Retrieval system described above works very well if the user is able to convey his information need in form of query. But query is seldom complete. The query provided by the user is often unstructured and incomplete. An incomplete query hinders a search engine from satisfying the user’s information need. In practice we need some representation which ca...

An information retrieval or document base system has to somehow deal with various phenomena of equivalence of some strings. These are lowercase versus uppercase matching, morphological inflection, derivation, and synonymy of words: e.g., given a query computer, find Computers, computing, workstation. The latter problems are very important in languages with richer morphology and less stable term...

Over the last fifteen years, web searching has seen tremendous improvements. Starting from a nearly random collection of matching pages in 1995, today, search engines tend to satisfy the user’s informational need on well-formulated queries. One of the main remaining challenges is to satisfy the users’ needs when they provide a poorly formulated query. When the pages matching the user’s original...

In 1999, AT&T participated in the ad-hoc task and the Question Answering (QA), Spoken Document Retrieval (SDR), and Web tracks. Most of our eeort for TREC-8 focused on the QA and SDR tracks. Results from SDR track show that our document expansion techniques, presented in 8, 9], are very eeective for speech retrieval. The results for question answering are also encouraging. Our system designed i...

To address the task of automated query expansion with compound queries we make use of the highly structured Wikipedia corpus. We consider every article linked to by a specific disambiguation page as a unique sense. Using language modeling analysis over the articles referred to in order to determine which sense is most likely intended by considering the co-occurence of the different query terms ...

The use of taxonomies and ontologies as a foundation for enhancing textual information base access has recently gained increased attention in the field of information retrieval. The objective is to provide a domain model of an application domain where key concepts are organized and related. If queries and information base objects can be mapped to this, then the ontology may provide a valuable b...