[xsl] output the result of the transformation twice, indented and not in

Dear list,

I have an XSL stylesheet that produces a large XML document. I would 
like to output the XML document twice, once indented (for human 
readability) and once not indented (for faster access by other scripts). 
I am wondering whether this can be done from within a single stylesheet.
In order to achieve what I want, I could, of course, produce two 
versions of the stylesheet, one with <xsl:output indent="yes"/> and the 
other with <xsl:output indent="no"/>, and then run them consecutively. 
The disadvantage of doing that would be that, if I later want to change 
the stylesheet, I would have to make the changes twice, which, apart 
from the additional effort, would be a possible source of errors.
I guess that I could achieve what I want from within a single stylesheet 
with <xsl:result-document>. But in that case, if I understand correctly, 
I would have to copy the entire code of the stylesheet into 
<xsl:result-document>. So the code would, again, be duplicated.
So my question is this: Is there a way to obtain the two versions of the 
XML document (indented and not indented) without duplicating the code?
Thank you in advance for your help!

Best,
Wolfhart
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