When the constraint expression of a query is not a CNF (Conjunctive Normal Form),it is generally transformed into an equivalent DNF (disjunctive normal form)an union of CNFs .
当数据立方查询条件不是合取范式时，一般是将它转化成为若干合取范式的并的形式(析取范式)。
参考来源 - 一种数据立方查询条件优化策略 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
A simplified method is given in practice: on the one side, it extracts the differential elements to construct conjunctive normal form from the information table.
实际应用中给出一种简化算法：一边从信息表中提取差别元素构成合取范式，一边用分配律、吸收律作逻辑公式的等价变换，直接得到最小析取范式。
This paper presents a fast and efficient algorithm for discovering exceptional rules from data sets. This algorithm permits that the consequent of a rule is a conjunctive normal form.
文章提出一种快速有效发现意外规则的算法，该算法允许规则的结果为合取范式。
With respect to the principal disjunctive normal form and the principal conjunctive normal form, we also approach the properties of the subscript sets derived from the minimum term and maximum term.
讨论了命题公式的主析取范式、主合取范式中的极小项与极大项下标集合的性质，利用主范式的下标集合得到了命题公式蕴涵的几个充要条件。
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