A memory stores a plurality of first data structures, which includes element specific data objects indicating a classification of at least one of the plurality of segments of the test definition language, and second data structures, which include attribute specific data objects indicating at least one...http://www.google.com.tw/patents/US7494340?utm_source=gb-gplus-share專利 US7494340 - Extensible exam language (XXL) protocol for computer based testing
