serializer.setOutputWriter(writer);
S9apiUtils.serialize(runtime, doc, serializer);
writer.close();
ByteArrayInputStream bais = new ByteArrayInputStream(writer.toString().getBytes("UTF-8"));
sp.process(bais, doc.getBaseURI().toASCIIString());
} catch (IOException e) {
throw new XProcException(e);
} catch (ParseException e) {
throw new XProcException(e);
}