First off, I agree with roboticus. The proposed XML schema is obscure and doesn't add any value. If you have any say, please try changing it. Also, I'd suggest trying the marc2xml-tools, but given that they aren't suitable, read on...

As far as I can see, XML::Writer isn't streaming its output, which means that you'll be buffering a data structure representing the entire XML document in memory. This doesn't really sound like a useful approach, given the expected output size, unless the output is generated in chunks (the records described in the question). For this purpose, it seems that XML::Writer wants to insert processing instructions, which makes chunk generation unfeasible without nasty hacks.

For generating chunks, I'd suggest XML::Generator - a wonderfully simple and flexible module.

If the chunk approach is undesirable, I'd look for a module that can serialize SAX events.

In reply to Re^2: Converting text to XML; Millions of records. by mzedeler
in thread Converting text to XML; Millions of records. by MikeEndo

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