<A id="a1">
 <B id="b2">
   <C id="c1">
        <D>d1</D>
        <D>d2</D>
   </C>
   <C id="c2">
        <D>d3</D>
   </C>     
 </B>
 <B id="b3">
   <C id="c1">
        <D>d1</D>
        <D>d2</D>
   </C>
   <C id="c2">
        <D>d3</D>
   </C>     
 </B>

</A>
<A id="a2">
 <B id="b4">
   <C id="c1">
        <D>d1</D>
        <D>d2</D>
   </C>
   <C id="c2">
        <D>d3</D>
   </C>     
 </B>
 <B id="b5">
   <C id="c1">
        <D>d1</D>
        <D>d2</D>
   </C>
   <C id="c2">
        <D>d3</D>
   </C>     
 </B>

</A>
[download]

Now we have 2 files, but I still have no idea what the resulting "merged" file should look like. It could be:

<Z><A id="a1">...</A><A id="a2">...</A></Z>

which would be quite easy to do, you don't even need Perl for this, but it could also be a file where only D elements are added according to conditions on various tags/attributes...

What system are you trying to install XML::Parser on? Versions up to 2.29 include expat, so all you need is a C compiler, gcc works fine, to install the module. The only problem you can find is that it can collide with the static install of expat done by Apache. So version 2.30 comes without expat, which you have to install (you can find expat on sourceforge here).

Ok, I am trying to install XML::Parser once again.. Help me out..
I would like to install it in ~/lib directory, where I put all my local modules.
First question is what I should put for makefile.

 perl Makefile.PL ????
[download]


Thanks,
Artist

I need perl for the same as this is going to be automatic.
I successfully installed XML::Parser using PREFIX=~
When I am trying to install other modules, it looks for @INC as defined by the system and cannot find the modules I just installed. How do I change that..
Thanks..
Artist

Perhaps mirod wasn't clear enough. Look at XML::SAX::Simple and XML::SAX::PurePerl. No expat is required. And neither is libxml if you don't want that either.