Sentence:  The only requirements on dictionary information made by the text lookup <WSD>operation</WSD> are that each form represented by the dictionary be available for lookup in the text form list and that information for each form be available in a sequence identical with the sequence of the forms . 
Meaning of the word marked with <WSD> tags:  (computer science) data processing in which the result is completely specified by a rule (especially the processing that results from a single instruction)