You can simply use a JAXP Transformer to do it *without* a stylesheet by 
using the identity transform (in JAXP, you simply get a newTransformer() 
without a source document); or you can copy a stylesheet that does the 
identity transform and then set the indent-amount yourself (since Xalan's 
default indent is 0 chars for performance reasons).

See http://xml.apache.org/xalan-j/getstarted.html#commandline
And http://xml.apache.org/xalan-j/usagepatterns.html#outputprops
for Xalan details of indent-amount.
See 
http://cvs.apache.org/viewcvs.cgi/*checkout*/xml-xalan/test/tests/bugzilla/identity.xsl?rev=HEAD
for a copy of the identity.xsl stylesheet.

- Shane


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