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Re: DOM Core Level 3 questions

From: Michael Amster <mamster@webeasy.com>
Date: Tue, 24 Apr 2001 23:36:59 -0700
Message-ID: <3AE6708B.C2521EA2@webeasy.com>
To: www-dom@w3.org
Joseph Kesselman wrote:
> 
> 
>      "normalizeNS - are there examples of unnormalized trees
>      and normalized trees to reference?"
> A namespace-unnormalized tree would typically be one where some or all
> nodes use undeclared namespaces, or use prefixes which aren't bound to the
> node's namespace, or have namespaces but don't have any prefix at all.
> These are all legal states for the DOM, since namespaces are officially
> just "syntactic sugar" (per the Namespace Recommendation), but they're a
> complication that some application code may not want to deal with -- just
> as successive Text nodes are legal in the DOM but may be a nuisance for
> some applications to process. Running normalizeNS() will reconcile these by
> changing/creating/defining prefixes in some reasonable manner.
> 
> The algorithm currently described in the Working Draft is one proposed
> "reasonable manner", included for discussion. As you can see by the many
> open issues, a significant amount of discussion is still required.
> 
> 
> ______________________________________
> Joe Kesselman  / IBM Research

Joseph:

So how do we deal with the following scenarios:

1. We have a prefix without a namespace URI declaration.  Do we remove
the prefix?  Do we create a bogus namespace URI?  How do we manufacture
declarations?

2. How do we handle ambiguous nodes - children of a namespace node that
may have ancestors from another namespace.  I assume the most direct
parent wins.

Most of the other situations are easy except for the comment about how
to handle read-only nodes.

Any thoughts?  How far along is the Xerxes reference implementation?

-MA


-- 
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Michael Amster              mamster@webeasy.com
1416 2nd Street             Tel: 310.576.0770
Santa Monica, CA 90401      Fax: 310.576.2011
Received on Wednesday, 25 April 2001 02:37:10 GMT

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