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At 02:20 PM 9/19/98 -0400, John Cowan wrote: >> When processing large documents building entire trees is >> resource intensive and time consuming. Sometimes you only >> the power of tree navigation stuff for sub-parts of the >> source document. > >This is difficult with the DOM, because every Node must have >a pointer to the root (Document) Node. Lazy evaluation is perfectly OK in the DOM, which says absolutely nothing about the physical representation of a Node, e.g. it does not say that a Node must have a pointer, merely that it be able to return a reference to the root. Every Node must be capable of returning such a pointer when asked, but until someone asks for the root node, there is no need to construct such a node. Similarly, a Node must be able to return references to parent or child nodes, but those nodes need not be constructed until the reference is asked for. Jonathan jonathan@t... Texcel Research http://www.texcel.no xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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