Deleting, Erasing or Hiding Tags

I have an XML document as follows:

<root>
        <a>text</a>
        <b>text</b>
        <c>text</c>
<root>


Can I erase, delete or hide (using XSL) the "b" and "c" tags without having
to change the schema or DTD?


Thx a lot!

Daniel.

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