kleen meaning in Chinese

克伦

The thesis simplely discusses three question about content query : simple query ( also called matching ) , field query and boolean query . the thesis gives five basic path query expression , namely simple regular path expression , order regular path expression , attribute regular path expression , value regular path expression and kleen closure regular path expression . the thesis summarizes four operation for the five basic regular path expression : pc operation ( parent - child ) , ad operation ( ancestor - descendant ) , co operation ( containment ) , or operation ( order )
在研究结构查询技术时，本文提出了五种基本的路径表达式，即简单路径表达式、含序路径表达式、属性路径表达式、含值路径表达式和kc路径表达式，本文研究了这五种基本路径表达式的实现方式，通过分析这五种路径表达式的实现，笔者提出了四种针对结构信息的基本操作，即pc操作、 ad操作、 co操作和or操作。