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string-length函数返回字符串的字符数,你应该用&lt;替代<, 用&gt;代替>
 
//*[string-length(name()) = 3]
选择名字长度为3的元素

     <AAA>
          <Q/>
          <SSSS/>
          <BB/>
          <CCC/>
          <DDDDDDDD/>
          <EEEE/>
     </AAA>
在XLab中打开实例 | 树视图 (JPG)
 
//*[string-length(name()) < 3]
选择名字长度小于3的元素

     <AAA>
          <Q/>
          <SSSS/>
          <BB/>
          <CCC/>
          <DDDDDDDD/>
          <EEEE/>
     </AAA>
在XLab中打开实例 | 树视图 (JPG)
 
//*[string-length(name()) > 3]
选择名字长度大于3的元素

     <AAA>
          <Q/>
          <SSSS/>
          <BB/>
          <CCC/>
          <DDDDDDDD/>
          <EEEE/>
     </AAA>
在XLab中打开实例 | 树视图 (JPG)



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