nsindexpath - Xpath, How to select elements with a specific attribute? -


i learning xpath , trying data html using xpath.
how select elements "a number" c contain c1>1 , price<20

i want select elements:

<a number=1234 date=05-25-2007>  <a number=1235 date=05-26-2007> <a number=1237 date=05-25-2007>  
  
  
    <a>         <a number="1234" date="05-25-2007">            <b>               <b1>judith miller</b1>               <tax n="yes" rate="21"/>            </b>            <c>               <c1 x="xxxxx" price="20"/>               <c1 x="yyyyy" price="15"/>            </c>         </a>         <a number="1235" date="05-26-2007">            <b>               <b1>herbert marshall</b1>               <adress street="saint marc 2250" city="oslo"/>               <tax n="yes" rate="21"/>            </b>            <c>               <c1 x="yyyy" price="25"/>               <c1 x="zzzz" price="12"/>               <c1 x="xxxx" price="22"/>            </c>         </a>         <a number="1236" date="05-26-2007">            <b>               <nazwa>judith miller</nazwa>               <adress street="kennedy 511" city="florida"/>               <tax n="yes" rate="21"/>            </b>            <c>               <c1 x="fffff" price="15"/>            </c>         </a>         <a number="1237" date="05-25-2007">            <b>               <b1>harrison faber</b1>               <adress street="street 326" city="london"/>               <tax n="no" rate="0"/>            </b>            <c>               <c1 x="xxx" price="20"/>               <c1 x="yyy" price="9"/>            </c>         </a>      </a>
  
 
 
  
after fixing data well-formed , uniform, able 3 a's with
  
//a[count(c/c1) > 1][c/c1/@price < 20] 
  
fixed data:
  
<root>   <a number="1234" date="05-25-2007">     <b>       <b1>judith miller</b1>       <tax due="yes" rate="21"/>     </b>     <c>       <c1 x="xxxxx" price="20"/>       <c1 x="yyyyy" price="15"/>     </c>   </a>   <a number="1235" date="05-26-2007">     <b>       <b1>herbert marshall</b1>       <adress street="saint marc 2250" city="oslo"/>       <tax due="yes" rate="21"/>     </b>     <c>       <c1 x="yyyy" price="25"/>       <c1 x="zzzz" price="12"/>       <c1 x="xxxx" price="22"/>     </c>   </a>   <a number="1236" date="05-26-2007">     <b>       <b1>judith miller</b1>       <adress street="kennedy 511" city="florida"/>       <tax due="yes" rate="21"/>     </b>     <c>       <c1 x="fffff" price="15"/>     </c>   </a>   <a number="1237" date="05-25-2007">     <b>       <b1>harrison faber</b1>       <adress street="street 326" city="london"/>       <tax due="no" rate="0"/>     </b>     <c>       <c1 x="xxx" price="20"/>       <c1 x="yyy" price="9"/>     </c>   </a> </root>

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