generate xml from sample xml

hi,
i need to generate an xml files of some data in my database ...
i've an xml sample of the result xml nad i've to create a xml
with the same structure ...
which it is the better and faster way?
Can i retrieve a schema from the sample.xml and then write an
xml based on this schema ?
Might i use Dataset.readxmlschema , Dataset.readxml and
Dataset.writexmlschema , Dataset.writexml ???
tnx in advance
andrew