采用剪枝技术来消除构造过程中存在的冗余内涵比较，给出约束概念格渐进式构造算法PCCL。
An incremental construction algorithm named PCCL of the constrained concept lattice was presented by using pruning technology that eliminated the redundant information in the construction process.
第二、基于剪枝的概念格分布式构造。
Secondly, a distributed constructing method of concept lattice is presentd based on pruning.
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