XML : Verify if there is COMMON point two xml file perl

Hello please I am beginner . I have two xml file.

the first file is like that :

....

  < example1 > name="AAAA" tool="BBBB' version="2012.12-A3"           

< example1 > name="ddef" tool="GGGG' version="2012.12-A3"

The second file :`

< TOOL>
< EX >AAAA_2012.12-A3< EX >
< NAME > AAAA < /NAME>

SO I sould verify if example1 with the name AAAA has the same version in the second file . In general I should verify if EXEMPLE with the same name has the same version Thank u