XSLT Attribute to Element / Preventing Deletions?

Hello,

i have two questions.

1) could someone tell how difficult it is to write XSLT-transformations
   that convert specific tag-attributes to elements and back again? 
   Or even better, does someone have a recipe for this?

2) How could/should i prevent BXE from deleting "required" elements and/or
   attributes? Basically I don't want a user e.g. erasing (in BXE-WYSIWYG-mode) 
   the title in this structure:

    <list>
        <title>sometitle</title>
        <li>alksjd</li>
        <li>alksjd</li>
    </list>

    (bxe-attributes left out for convenience)
    the title is content-editable and only the complete list or
    single elements (<li/>) should be allowed to be deleted.

thanks for any answers or requests for clarification :-)

    holger
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