XPath实例教程十五、preceding-sibling 轴

preceding-sibling 轴(axis)包含上下文节点之前的所有兄弟节点

 

/AAA/XXX/preceding-sibling::*

     <AAA>
          <BBB>
               <CCC/>
               <DDD/>
          </BBB>
          <XXX>
               <DDD>
                    <EEE/>
                    <DDD/>
                    <CCC/>
                    <FFF/>
                    <FFF>
                         <GGG/>
                    </FFF>
               </DDD>
          </XXX>
          <CCC>
               <DDD/>
          </CCC>
     </AAA>

 

//CCC/preceding-sibling::*

     <AAA>
          <BBB>
               <CCC/>
               <DDD/>
          </BBB>
          <XXX>
               <DDD>
                    <EEE/>
                    <DDD/>
                    <CCC/>
                    <FFF/>
                    <FFF>
                         <GGG/>
                    </FFF>
               </DDD>
          </XXX>
          <CCC>
               <DDD/>
          </CCC>
     </AAA>