- From: Richard Tobin <richard@inf.ed.ac.uk>
- Date: Mon, 3 Nov 2008 15:37:03 +0000 (GMT)
- To: Brett Zamir <brettz9@yahoo.com>, Richard Tobin <richard@inf.ed.ac.uk>
- Cc: www-xml-linking-comments@w3.org
> I see (responding to your point about it not being related to ancestor
> elements). But I was trying to find somewhere where the issue was made
> explicit as to how xml:base is not only based on the parent, since there
> are these following lines (and basically only these lines on the topic)
> which only refer to "parent element" and not clearly to an indefinite
> number of levels of inheritance of within the document (and regardless
> of whether xml:base was explicitly present on the parent or not, etc.):
>
> "The base URI of an element is...the base URI of the element's parent
> element within the document or external entity, if one exists..."
>
> "The base URI for a URI reference appearing in an |xml:base| attribute
> is the base URI of the parent element of the element bearing the
> |xml:base| attribute, if one exists within the document entity or
> external entity, otherwise the base URI of the document entity or
> external entity containing the element."
>
> Maybe that is made clear in other referenced specs, but since this seems
> to be such a central point of the spec, I would think clarifying that
> would be helpful.
The answer follows from the rules you quote above. Given
<a xml:base="http://example.com">
<b>
<c> ...
the base URI of the <c> element is (by 4.2 part 2) the base URI
of the <b> element. Similarly, the base URI of the <b> element
is the base URI of the <a> element. And by 4.2 part 1, the base
URI of the <a> element is "http://example.com".
-- Richard
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Received on Monday, 3 November 2008 15:37:44 UTC