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[Bug 24542] Can we add a note on intrinsically non-streamable axes?

From: <bugzilla@jessica.w3.org>
Date: Thu, 06 Feb 2014 12:44:38 +0000
To: public-qt-comments@w3.org
Message-ID: <bug-24542-523-1lX3oB8O3I@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=24542

--- Comment #1 from Michael Kay <mike@saxonica.com> ---
Rule #3 may be (unduly?) influenced by the fact that in Saxon, I do most
optimization work before I do streamability analysis, and optimization turns
trivially-void expressions such as "/.." and "@comment()" and
"@x/following-sibling::*" into "()", making them intrinsically streamable.

I would defend the rule, however. We shouldn't make expressions non-streamable
unless they really are, and on that basis, streaming of these "void path
expressions" is possible.

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