XPath學習2：parent

parent  選取當前節點的父節點

 parent軸是選取當前節點父節點,下面看簡單示例：

     //DDD/parent::*     獲取所有節點DDD的父節點

  <AAA> 

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

 

    /AAA/BBB/parent::*    得到根節點AAA，這樣寫在實際中沒有意義。

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

 

   /AAA/parent::*     根節點無法獲取到parent

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