Abstract: Methods of hierarchically parsing and indexing text are provided. A source text is parsed to identify first level text entities and lower level text entities wherein the lower level text entities are subsets of their parent text entities. First level text entities are assigned a first level value corresponding to their locations within the source text, and lower level text entities are assigned lower level values, subordinate to their corresponding parent level value. Multiple levels of text entity parsing and numbering may take place. The association of linguistically derived variants of the text entities with their locations takes place.

Abstract: A computer system and method for information indexing and retrieval. The full text index can searchably accommodate linguistic, phonetic, conceptual, contextual and other types of relational and descriptive information. The full text index is created in two phases. In the first phase, a word list symbol table, an alphabetically ordered list and a non-repeating word number stream are constructed from the source text. In the second phase, a word number access array and in-memory full text index are constructed and then index data is merged into the final index.