[xsl] how to make "well-formated" xml file from xslt

[Ha Nguyen <hoangha2k3@xxxxxxxxx>]

Hi all,

I'm sorry if my question is off-topic or stupid. 
I write an xslt file to transform an xml to another
xml file. The output xml file is ugly i.e every tag
are aligned at the same level.
Ex:
<Diagram>
<Graph>
<Node>
...
</Node>
</Graph>
</Diagram>

How to make it look like "normal" xml file ?
Thanks a lot!
Suzy.

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