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- From: "Rick Ross" <rick@activated.com>
- To: Bill la Forge <b.laforge@jxml.com>
- Date: Thu, 11 Feb 1999 08:28:35 -0500
It is item 3. that seems to be the killer - I cannot layer anything onto
your standard DOM implementations. If my design goal is to get the job done
by relying only on standard interfaces, then success seems unlikely.
Gosh, I would LOVE to learn I am missing the point, I would LOVE to have
someone clarify the standards-compliant approach that resolves this
predicament without exacting too high a performance penalty.
I really thank people for trying to come up with these ideas, and I remain
hopeful that the solution is still lurking out there.
Regards,
Rick
Bill la Forge wrote:
>
> One of the problems with DOM/namespace is the difficulty of manipulating
> the tree while tracking namespace scoping. A partially lazy approach seems to work:
>
> 1. Do NOT make any namespace transformations while building the tree.
> Instead, propagate the xmlns attributes to all children. (Use the inheritance filter.)
>
> 2. Manipulate the tree as desired.
>
> 3. Layer additional methods onto the DOM (you can either subclass things or
> use static methods) for accessing the unique name based on the xmlns attributes
> attached to the Element being accessed.
>
> 4. When converting from the DOM to SAX events or when creating a document from the
> DOM, drop xmlns attributes which are assigned the same value in the parent element.
>
> OK, it means the application will likely need to be namespace aware to work with
> this.
>
> Overhead may be a bit of an issue, but then it always is when using a DOM.
>
> Bill
>
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