[xsl] LF and serialize()?

Dear XSL-List,

When I run serialize() (in Saxon-HE 9.9.1.4J XSLT) over an XML snippet, it does 
what I need, except that it replaces LF inside attribute values with SP. This 
seems to be consistent with what I read at 
https://www.w3.org/TR/REC-xml/#AVNormalize, and the workaround described there 
(use a numerical character reference to LF instead of the raw LF character) 
works. But I’d like to avoid having to specify in the XML something that I 
would prefer to manage during the XSLT transformation, and I would also like to 
avoid pre-processing the XML outside an XML environment and replacing the LF 
with a numerical character reference there, before passing the modified XML 
into the XSLT transformation.

So: Would anyone happen to know of a way within just an XSLT stylesheet to 
retain LF within an attribute value as distinct from SP in the output of 
serialize()?

Thanks,

David
djbpitt(_at_)gmail(_dot_)com