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Currently many niche search engines have adopted what we call a linear/top-down/hierarchical approach. We think the rigidity of this linear/top-down/hierarchical approach may limit the user to search within the classification of the resources. Additionally, there are many forms of metadata which have not been fully exploited during the search process.
To overcome the rigidity of linear/top-down/hierarchical search, we propose to experiment with the dynamic query approach used to great effect by Shneiderman 1 in other contexts. Dynamic queries help users search and explore large amounts of information by presenting them with an overview of the datasets, and then allow them quickly to filter out unwanted information. “Users fly through information spaces by incrementally adjusting a query (with sliders, buttons, and other filters) while continuously viewing the changing results.” A popular example of this approach is that of Kayak.co.uk , a meta-search engin
