一个STMTKEY元素，它标识出必须应用准则的语句。
A STMTKEY element that identifies the statement to which the guideline must apply.
如果优化器无法应用准则，那么它将返回警告437，其原因代码为13。
If the optimizer was not able to apply the guideline, it returns warning 437 with reason code 13.
根据模糊数学的隶属函数和最大隶属原则，讨论了模糊综合评判方法和应用准则，建立了测井判别油水层的模糊数学模型。
Discussed are the fuzzy comprehensive evaluation method and its application principle according to membership function and maximum subordination principle in fuzzy mathematics.
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