Design Question: XSLT Configurable

Hi there,

i work on a application that let the users configure it to their
needs using a certain file (a user-settings.xml)
during the years this file
has changed, so there exist different versions now. my idea is to transform
all of them to the newest version.
the configuration file is a very simple xml
file (max 2 levels), the changes are also moderate (create node, delete node,
rename node and merge content of nodes).
the thing is, i want to keep the
transformation expandable by only configuring what have changed from version
to version.
e.g. like that

-------------------------------------
<Versions>
<Version nr="0.3">
        <Actions>
            <RenameAction
fromElement="elementA" toElement="elementD"/>
        </Actions>
</Version>
    <Version nr="0.2">
        <Actions>
<MergeContentAction toElement="elementA" separator=" ">
<MergeFromElement name="elementB"/>
                <MergeFromElement
name="elementC"/>
            </MergeContentAction>
        </Actions>
</Version>
    <Version nr="0.1">
</Versions>
-------------------------------------

so, i only will have one transformation
file instead of a file for each version.

what about this approach? i think
that this is supposed to be a common issue, isn't it?

Thanks for your ideas,
Matthias