xml - Xpath expression for an element that has two child elements with the same name. -


i need figure out xpath expression sections co-taught 2 instructors. know how sections instructor child, i'm lost on how sections more 1 instructor child.

 <?xml version="1.0" encoding="utf-8"?>     <courses>       <course number="341" credits="4.0">         <title>data structures</title>         <section number="01" delivery="classroom">           <enrollment>15</enrollment>           <room>ea244</room>           <instructor>             <first>nicole</first>             <last>anderson</last>           </instructor>         </section>         <section number="02" delivery="online">           <enrollment>10</enrollment>           <instructor>             <first>nicole</first>             <last>anderson</last>           </instructor>           <instructor>             <first>chi-cheng</first>             <last>lin</last>           </instructor>         </section>         <section number="03" delivery="classroom">           <enrollment>12</enrollment>           <room>sh102</room>           <instructor>             <first>mark</first>             <last>funk</last>           </instructor>         </section>       </course>       <course number="368" credits="4.0">           <title>introduction bioinformatics</title>         <section number="01" delivery="classroom">           <enrollment>9</enrollment>           <room>at102</room>           <instructor>             <first>chi-cheng</first>             <last>lin</last>           </instructor>           <instructor>             <first>mingrui</first>             <last>zhang</last>           </instructor>         </section>       </course>       <course number="375" credits="4.0">           <title>computer systems</title>         <section number="01" delivery="itv">           <enrollment>18</enrollment>                 <room>ea244</room>           <instructor>             <first>chi-cheng</first>             <last>lin</last>           </instructor>         </section>       </course>       <course number="385" credits="3.0">           <title>applied database management systems</title>         <section number="01" delivery="classroom">           <enrollment>26</enrollment>                 <room>st108</room>           <instructor>             <first>nicole</first>             <last>anderson</last>           </instructor>         </section>       </course>       <course number="413" credits="3.0">           <title>advanced networking</title>         <section number="01" delivery="online">           <enrollment>10</enrollment>           <instructor>             <first>chi-cheng</first>             <last>lin</last>           </instructor>         </section>       </course>     </courses>

you can use //section[instructor[2]] or //section[count(instructor) > 1].


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