At 2012-05-24 08:58 -0400, you wrote:
One additional question, please:
Preceding nodes do not include ancestors, which I've thought is
odd. It includes siblings, but not parent or grand-parent, etc.
When looking at an XML file in an editor, ancestors surely seem to
be preceding where I am in the document.
But perhaps "preceding" means nodes before "me" but not including
anything that contains "me".
Is that a useful way to look at "preceding"?
When I talk about my diagram in the classroom, I also use the "me"
approach and I use the following distinctions:
- the self axis is me
- the preceding nodes are all those nodes that start and end before I start
- the following nodes are all those nodes that start and end after I end
- the ancestor nodes are all those nodes that have started before me
but not yet ended
- the descendent nodes are all those nodes that start after I've
started and end before I end
... and that covers off all of the nodes in the document. I cite the
bizarre XML document above the diagram so that students can see the
starting and the ending as I quote above.
I hope this helps.
. . . . . . . . . . Ken
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