Hi monks, may be this seems to simple but for me its hard because I am new to perl I have one xml file like this 

<university>
<name>svu</name>
 <location>ravru</location>
 <branch>
   <electronics>
     <student name="vijju" number="12">
     <semester number="1"subjects="7" rank="2"/>
     </student>
     <student name="mikky" number="15">
     <semester number="1" subjects="7" rank="10"/>
     <semester number="2" subjects="4" rank="1"/>
      </student>
       <student name="clar" number="16">
       <semester number="1"subjects="7" rank="2"/>
      <semester number="3"subjects="4" rank="2"/>
       </student>
    </electronics>
  </branch>
</university>
.
.
.
.
.
<data>¨
<student name="vijju" number="12" address="polugaripalli,t.v.puram, ba
+dvel, kadapa"/>
<student name="mikky" number="15" address="papireddypalli, badvel, kad
+apa"/>
<student name="clar" number="16" address="naidu nagr, badvel, kadapa"/
+>
<student name="xxx" number="17" address="gandhi nagr, badvel, kadapa"/
+>
<student name="xxx" number="12" address="gudur, badvel, kadapa"/>
.
.
.
.
<semister number="1" subject names="EDC,PDC,CDS"/>
<semister number="2" subject names="M1,LICA,SS"/>
<semister number="3" subject names="DIP,DSP,CEM"/>
....
..
..
</data>

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I need to add address from attribute studet in data element to the student attribut in the electronics element in the university tag, I need to add how many times I found the same name and number. same like subject names from data element to semister attribute in the electronics element in university tag. my output need to be like this.

<university>
<name>svu</name>
 <location>ravru</location>
 <branch>
   <electronics>
     <student name="vijju" number="12" address="polugaripalli,t.v.pura
+m, badvel, kadapa">
     <semester number="1"subjects="7" rank="2" subject names="EDC,PDC,
+CDS" />
     </student>
     <student name="mikky" number="15" address="papireddypalli, badvel
+, kadapa" >
     <semester number="1" subjects="7" rank="10" subject names="EDC,PD
+C,CDS"/>
     <semester number="2" subjects="4" rank="1" subject names="M1,LICA
+,SS"/>
      </student>
       <student name="clar" number="16" address="naidu nagr, badvel, k
+adapa" >
       <semester number="1"subjects="7" rank="2"subject names="EDC,PDC
+,CDS"  />
      <semester number="3"subjects="4" rank="2" subject names="DIP,DSP
+,CEM" />
       </student>
    </electronics>
  </branch>
</university>

[download]

In reply to help me with perl script that add xml attritutes by veerubiji

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