| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating an expression, which comprises issuing parallel requests to acquire a plurality of operands. SOLUTION: If, upon receipt of a first subset of the operands, it is determined that a second subset of the operands is no longer required in respect of a particular time span, the request for the second subset is cancelled for that particular time span. If one operand contains an error indication for a particular time span, the method continues with the request for the other operand for that particular time span, and returns an "error" for that particular time span only if the request for the other operand is not cancelled. COPYRIGHT: (C)2007,JPO&INPIT
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