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Stephen E. Beller wrote:
>
> I know how to (a) pre-arrange large data sets into particular arrays needed
> for rendering graphs, (b) store these arrays in a delimited text file (e.g.,
> CSV) for rapid transport, (c) quickly open the file client-side in a
> spreadsheet and (d) immediately render lots of offline-interactive
> (slice/dice-able) charts without intermediate data transformation. This is a
> very fast, simple, efficient process.
>
> I'm trying to do a similar thing within an XML file for client-side browser
> rendering, but don't want the overhead of tags and XSLT parsing if possible.
>
> Is there a way to do this?
You request is not clear yet. If you do not want to use xml, then why
are you using xml? Even if you do use xml, you do not have to use xslt,
although it might turn out to be useful anyway.
The overhead is only significant if it incurs a perceptible delay for
the user, right? Is your data set so big that this happens now?
Anyway, how are you rendering charts in a browser? Or is it not charts
and graphics that you want to do?
Assuming that you are handed some kind of xml file, it is presumably
record oriented, so some kind of SAX or SAX-like handling would be
indicated. That would be fast and should lend itself to similar
handling to your previous files, in that each row could be quickly and
easily split up into fields.
If you are going to use IE or Mozilla, each of them give you some access
to their xml parser. Otherwise, if you know your source xml data will
always be in a simple format that does not use any of the more complex
features of xml, there are a few javascript xml parsers out there that
would probably work. They do not implement all xml's features, but that
would probably not matter for your purposes.
Your approach will probably also depend on whether it needs to work
cross-browsers or not, and which browsers need to be supported.
Cheers,
Tom P
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