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Re: [xml-dev] What's wrong with namespaces? Some observations and suggestions
- From: Dimitre Novatchev <dnovatchev@gmail.com>
- To: Michael Kay <mike@saxonica.com>
- Date: Sun, 5 Dec 2010 08:25:44 -0800
On Sat, Dec 4, 2010 at 3:24 PM, Michael Kay <mike@saxonica.com> wrote:
> Elements should have simple (string-valued) names, using hierarchic naming
> to achieve uniqueness, and context-sensitive abbreviation to achieve
> conciseness. It should always be legitimate to use the full name if
> abbreviation is not wanted.
>
> Hierarchic naming: for example an element might be called
> :org.w3c.html.table.
>
> Abbreviation: this might be abbreviated to "table". How is the abbreviated
> name resolved? Using the hierarchic name of the parent element. So the
> outermost element gives the full name
>
> <:org.w3c.html.html>
>
> and inner elements can use abbreviated names if they are in the same
> "namespace":
>
> <:org.w3c.html.html>
> <head>
> <title>...</title>
> </head>
> <body>
> <:org.w3c.svg.svg>
> <rectangle>
It's good to have a syntactically complete example:
<:org.w3c.html.html>
<head>
<title>...</title>
</head>
<body>
<:org.w3c.svg.svg>
<rectangle/>
</svg>
</body>
</html>
This shows an additional advantage: the end tag can be completely abbreviated.
An interesting question is how we would write compact XPath
expressions for XML2:
/*/head/body
should select the :org.w3c.html.body element.
Should we have to write:
/*/head/body/:org.w3c.svg.svg
or
could it be:
/*/head/body/:~svg.svg
If we don't find convincing counterexamples, I believe such compact
syntax for XPath expressions is appropriate.
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
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