Murtagh, F., Mothe, J. and Englmeier, K. (2007) Ontology from Local Hierarchical Structure in Text.
Full text access: Open
We study the notion of hierarchy in the context of visualizing textual data and navigating text collections. A formal framework for ``hierarchy'' is given by an ultrametric topology. This provides us with a theoretical foundation for concept hierarchy creation. A major objective is {\em scalable} annotation or labeling of concept maps. Serendipitously we pursue other objectives such as deriving common word pair (and triplet) phrases, i.e., word 2- and 3-grams. We evaluate our approach using (i) a collection of texts, (ii) a single text subdivided into successive parts (for which we provide an interactive demonstrator), and (iii) a text subdivided at the sentence or line level. While detailing a generic framework, a distinguishing feature of our work is that we focus on {\em locality} of hierarchic structure in order to extract semantic information.
This is a Submitted version This version's date is: 27/1/2007 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/95674c9b-198f-01d3-6951-52a1a58321bd/3/
Deposited by Research Information System (atira) on 27-Jan-2013 in Royal Holloway Research Online.Last modified on 27-Jan-2013
35 pp., 12 figures