RE: Merging 2 XML's in to 1 output XML (Performance I
> My ContentHandler is ready to handle that. More to the point, any > ContentHandler that expects to receive data from an XSL > transformation > had better be ready to handle that without falling over and dying, > because as we all know XSL transformations don't always generate > singly-rooted trees. The problem is, I don't know whether the ContentHandler does expect to receive data from an XSL transformation. This problem first arose, as it happens, with FOP as the ContentHandler. The way I handle this in Saxon 8.x is probably an improvement on my 6.x design. There's now a serialization property you can set, saxon:require-well-formed=yes|no, that tells Saxon whether the ContentHandler can accept non-well-formed trees or not. The default is yes, which suits some scenarios and not others. > Almost anything can > happen. A ContentHandler that does not control its parser should be > ready for this. It's actually very difficult to write a ContentHandler that's ready for anything, and I don't think many people attempt it. For example, most people assume that namespaces will be notified using the default settings - unfortunately a ContentHandler with no handle on the parser has no way of finding out what these settings are. JAXP says nothing about how an XSLT processor should notify namespace information to a SAXResult, so what is one to do? There are also new problems in this area, for example is it legitimate to send XML 1.1 names and namespace undeclarations to a ContentHandler that hasn't indicated it is prepared to cope with them? As you know yourself, the specs don't always provide the answers, and a software designer has to make decisions. Describing a conscious decision which happens to be different from the one you would have made as a "bug" is not helpful. Michael Kay http://www.saxonica.com/
PURCHASE STYLUS STUDIO ONLINE TODAY!
Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!
Download The World's Best XML IDE!
Accelerate XML development with our award-winning XML IDE - Download a free trial today!
Subscribe in XML format