Discussion of information filtering in information retrieval systems introduces a method for defining filters for structured text where the text structure is originally defined by a grammar consisting of a set of productions. Use of a template that is created interactively from the grammar is explained, and a prototype implementation is described.…

Discussion of XML focuses on a description of Tequyla-TX, a typed text retrieval query language for XML documents that can search on both content and structures. Highlights include motivations; numerous examples; word-based and char-based searches; tag-dependent full-text searches; text normalization; query algebra; data models and term language;…

Describes the design and implementation of a system for creating highlight abstracts to select relevant online magazine articles. Explains parsing texts based on text grammar and extracting sentences and statements that are relevant for inclusion in the abstract; and discusses knowledge representation and the importance of discourse structures in…