Ontology from Local Hierarchical Structure in Text
<|reference_start|>Ontology from Local Hierarchical Structure in Text: 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.<|reference_end|>
@article{murtagh2007ontology,
    title={Ontology from Local Hierarchical Structure in Text},
    author={F. Murtagh, J. Mothe and K. Englmeier},
    journal={arXiv preprint arXiv:cs/0701180},
    year={2007},
    archivePrefix={arXiv},
    eprint={cs/0701180},
    primaryClass={cs.IR}
}