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Lazy DOM building

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Following up a point that got raised about DOM performance.
The Xerces-j parser says that it supports lazy DOM building by default. In this approach, practically nothing is built until you need it.

I wonder how you would handle parser errors with this approach?

However, looking at the xerces based implementation in Java 5, code that mentions the feature "" seems to be frequently commented out.
When I tried setting this feature on a standard library DocumentBuilderFactory, I got an AbstractMethodError!
So it appears you would have to use a different parser than the default to get lazy DOM.

I would be interested to hear from anybody who has found a parser that actually implements this feature.
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