A digital computer system and method for storing and retrieving data contained in a "relational data table" in such a way that individual items of data are readily accessible and the data itself is compressible. The items of data are arranged in the table in a plurality of rows and columns. The items...http://www.google.com.hk/patents/US5414834?utm_source=gb-gplus-share專利 US5414834 - Method and apparatus for data storage and interchange using a relational database table, and a data record for use in connection therewith