Abstract: Indexing of a large dataset is performed by providing a search space including the dataset. For the search space, a lexicon of search terms is determined for those elements within the search space associated with terms within the lexicon. For some of the terms within the lexicon a secondary search space is determined. Then for each secondary search space, a further secondary lexicon of secondary search terms for those elements within said secondary search space associated with terms within the secondary lexicon is determined.

Abstract: A three-dimensional user interface is described in which applications are accessed via user interaction with images of three dimensional shapes providing on a display of a computing device. A user is able to adjust their viewpoint within a virtual three dimensional environment. The user interface provides an efficient and intuitive way of managing a large number of applications.

Abstract: The invention relates to a user interface, and method of providing such user interfaces, that allow the user to dynamically navigate through documents in a manner allowing the user to adjust dynamically to the situation unfolding as they work through the document, and to modify either the flow of the document or the content of the document during the course of their navigation and use of the document without having to exit the application that is running the documents presentation to the user. The invention achieves this by providing a three dimensional virtual environment and relating locations within the three dimensional virtual environment to elements of the document and indicating within the three dimensional virtual environment predetermined transitions from one of the elements to other elements of the plurality of elements. Further the invention allows the user to navigate the three dimensional virtual environment as part of generating, providing and using the document.

Abstract: The invention relates to a user interface, and method of providing three dimensional presentations of material for improved user understanding. Further the invention allows users to manipulate the direction of the presentation dynamically from within the three dimensional presentation and to transition from one section of a presentation to another by object selection within the three dimensional presentation. The invention achieves this by providing a three dimensional virtual environment comprising firstly the presentation itself, and second objects relating locations within the three dimensional virtual environment to transitions from one region of the presentation to another region of the presentation.