> We already have a lazy implementation for that, 

Ah, I see what XalanNodeListSurrogate does now.

> but I worry about bloating
> the size of elements if we decide to add it, since it means 4 or 8
extra
> bytes per Element for an interface we don't use internally.

Added 10% to the size doesn't seem important to me but I don't work with
huge source documents.

> Is it something you can layer on top of our implementation, or is that

> too awkward?

I can layer it on top of Xalan. It's a bit of a hassle but not a huge
one. 

Cheers,
Brian

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