Information retrieval systems aim to retrieve precise and relevant information in
response to a user's query. In past years entire documents which were considered to be
relevant or highly correlating were returned to users. However with growth of the web
and large numbers of XML documents, smaller elements or passages can be returned to
the user for more precise results.
This thesis explains Flex, our system for dynamic element retrieval, where in
XML elements rather than entire documents are retrieved and returned to the user. It also
gives an overview of the process of generating highly correlating elements (from a large
document collection) for a set of queries. The aim of this thesis is to improve the results
for the INEX 2009 and 2010 Ad Hoc Focused Tasks.
The Focused Tasks require that each query return a result set of non-overlapping
elements. This thesis describes the techniques involved in producing such elements and
compares the results produced.