Mapping words, phrases using sequential-pattern to find user spe

Details Mapping words, phrases using sequential-pattern to find user spe Mapping words, phrases using sequential-pattern to find user spe

1997-08-12

1999-12-21

Amsbury, Wayne

Data processing: database and file management or data structures

Database design

Data structure types

707 3, 707 6, 707102, 707203, 707511, 707532, G06F 1730

Patent

active

060062231

ABSTRACT:
A method and apparatus for mining text databases, employing sequential pattern phrase identification and shape queries, to discover trends. The method passes over a desired database using a dynamically generated shape query. Documents within the database are selected based on specific classifications and user defined partitions. Once a partition is specified, transaction IDs are assigned to the words in the text documents depending on their placement within each document. The transaction IDs encode both the position of each word within the document as well as representing sentence, paragraph, and section breaks, and are represented in one embodiment as long integers with the sentence boundaries. A maximum and minimum gap between words in the phrases and the minimum support all phrases must meet for the selected time period may be specified. A generalized sequential pattern method is used to generate those phrases in each partition that meet the minimum support threshold. The shape query engine takes the set of phrases for the partition of interest and selects those that match a given shape query. A query may take the form of requesting a trend such as "recent upwards trend", "recent spikes in usage", "downward trends", and "resurgence of usage". Once the phrases matching the shape query are found, they are presented to the user.

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