Re: Node Set and Node List differentiation

Subject: Re: Node Set and Node List differentiation
From: Norman Walsh <ndw@xxxxxxxxxx>
Date: Mon, 14 Jun 1999 16:10:09 -0400
/ "Gulzar, Nadir" <ngulzar@xxxxxxxx> was heard to say:
| I inferred the following based on the context. Can somebody please confirm
| or clarify the following.
| Node Set: Nodes that have common parent element type in the hierarchy. This
| is essential when using UnionExpr since subsequent filters would require
| consistency in the element type of input nodes.

I don't think there's any requirement that a node-set contain
only nodes that have a common parent. Using doc(), I can imagine
constructing a node set that contains nodes from different
documents (all nodes from the same document have at least one
common parent).

| Node List: Could be a 'Node set' but not necessarily. This is a context list
| of nodes that contain nodes of different types from arbitrary levels (in the
| document order).

By my reading of the spec, a node list is the list of nodes that
the processor is currently "working on". You can't instantiate a
node list, per se. And I don't think there's any reason to
expect the node list to be in document order.

Norman Walsh <ndw@xxxxxxxxxx>      | The [hydrogen] bomb's brilliant                 | gleam reminds me of the brilliant
                                   | shine Gleam gives to floors. It's
                                   | a science marvel.--Advertisment in
                                   | the Pittsburgh Press, 1954

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