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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: To Buy, or to Build? That is the q...
> Allen Chang wrote:
>
> The task: updating versions of my own XML documents,
> Question #1: Can I find/buy something ready to use, or do I have to
> write a little tool?
>
> I need to {add and replace} {names and values} of {elements and
> attributes}.
>
> For example, my document would have something like
>
> <Level1>
> <Level2>
> <Element1 attribute1="attribute1ValueA">
> element1ValueA
> <Element1/>
> <Element1 attribute1="attribute1ValueB">
> element1ValueB
> <Element1/>
> <Level2/>
> <Level1/>
>
> To convert an older version of this kind of document to a newer
> version, I need to be able to add attributes or whole new elements, or
> replace (which would include "delete") Element1, attribute1,
> attribute1ValueA or element1ValueA.
>
> Notice the elements are nested, and can be repeating (like
> "Element1"). I mentioned this since I heard some of the tools wouldn't
> handle it.
>
> Question #2: If I do write it, I think I would need to use
> instruction/mapping statements similar to SQL statements, right?
>
I would strongly recommend investigating XSLT [1] for this:
Advantages - it's stable, there are free, mature implementations for C,
COM and java, and it does precisely what you want.
Disadvantages - verbose XML syntax (which is however great for
generating XSLT with XSLT), and the best way of doing this task will be
to use a template model program, which is a bit of a mind-stretch for
procedural programmers.
But you'll enjoy it!
Francis.
[1] http://www.w3.org/TR/xslt
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