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At 2:24 PM +0200 6/27/03, Miguel A. Robles wrote: Dear colleagues, I usually work with XML for sending on information between different servers or applications. For example, currently I'm working with web services and everithing works fine. The problem appears now, because I have to parse a document containing a lot of information. DOM is not enough to accomplish the object because the document is extremly large, and I don't know how SAX deals with this kind of files. I know that XML is not intended for containing so much information, but I have to think about a possible solution. What do you think I could act to fix the problem? You could use XOM: http://www.cafeconleche.org/XOM/ The latest version provides a streaming, tree-based approach that allows you to work with pieces of the tree in sequence and then discard them. For many record-like documents this is much more convenient than SAX while still using only slightly more memory than the underlying SAX parser. Indeed, it can process arbitrarily large documents with effectively constant memory usage. And unlike SAX the document is fully read-write. Unlike some similar approaches this doesn't require you to learn XPath to preidentify the nodes of interest. There are limits. This won't help if you really do need to have the entire document in memory at once, or if you need to move about randomly in the tree. However, if you can work with a peephole view of the document stream, then XOM gives you a larger peephole than SAX. It can show you whole elements of your choice rather than individual tokens. I've found this approach to be shockingly useful for many applications. In many cases elements are the right granularity for processing a document. DOM's document level view is too large. SAX's token level view is too small. XOM's element level view is just right. :-) -- Elliotte Rusty Harold elharo@m... Processing XML with Java (Addison-Wesley, 2002) http://www.cafeconleche.org/books/xmljava http://www.amazon.com/exec/obidos/ISBN%3D0201771861/cafeaulaitA
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