XML dataset transformation

Hi I am new to XSLT i want to transform the Xml Dataset where student name is mapped from a xml where there is a dataset of student name and roll no. classwise.

I want to use a xslt but i dont want to add all the tags just the column name tag which is to be mapped and rest other columns as it is.

here is the input and output dataset example. The xml is normal dataset.writexml from c# code.

Table1:

RollNo    Sub1  Sub2 Sub3 Sub4
1         65    89   67   34
2         67    86   67   76
3         86    67   78   45
4         56    56   87   56
5         76    56   56   78

Table2

Name      Sub1  Sub2 Sub3 Sub4
Aman      65    89   67   34
Ankit     67    86   67   76
Om        86    67   78   45
Narendra  56    56   87   56
Faisal    76    56   56   78

This is the Xml to be used for transformation

<?xml version="1.0" standalone="yes"?>
<School>
    <Class Name="Class1">
        <StudentData Name="Aman" RollNo="1"  />   
        <StudentData Name="Ankit" RollNo="2"  />   
        <StudentData Name="Om" RollNo="3"  />   
        <StudentData Name="Narendra" RollNo="4"  />   
        <StudentData Name="Faisal" RollNo="5"  />    
    </Class>
    <Class Name="Class2">
        <StudentData Name="Abhinav" RollNo="1"  />   
        <StudentData Name="Abhishek" RollNo="2"  />   
        <StudentData Name="Ishaan" RollNo="3"  />   
        <StudentData Name="Mayank" RollNo="4"  />   
        <StudentData Name="Bhavana" RollNo="5"  />    
    </Class>
</School>

Thanks Aman