https://bugzilla.wikimedia.org/show_bug.cgi?id=4901

--- Comment #30 from Aryeh Gregor <[email protected]> 2011-05-17 
22:34:21 UTC ---
(In reply to comment #24)
> Reductio ad absurdum. Please don't.

Reductio ad absurdum is a legitimate argument technique, often used in
mathematical proofs.  What I'm saying is if we're going to add metadata like
this to every page, we have to establish a bar higher than "someone might
theoretically want to use it", because if we only require that, there's no
limit to what we could add.  I suggest a standard along the lines of "a
nontrivial percentage of users will benefit from it".  If the percentage of
users who would benefit is negligible, then it can be provided in some fashion
that doesn't require adding bytes to every page.

Another possible standard might be "we'll add any metadata that has dedicated
HTML attributes/elements, but not RDFa/microdata/rel values/etc. without real
use-cases".  That would allow hreflang but not an unlimited amount of stuff.  I
don't see the logic in it, though.

> That's not to say we shouldn't use more rel-values (like "previous" & "next" 
> in
> Wikipedia navboxes) and other metadata. A while ago, when I downloaded the
> en-Wiki article on Barak Obama it was 1814 KB; the microformat in it comprised
> just 110 characters of the emitted HTML code (~0.005% of the full download).
> That's not as many as in the preceding sentence.

hreflang on every interlanguage link for Barack Obama would add over 160*13
bytes, or about 2 KB, if I count right.  Granted, that's only about a quarter
of a percent, so it's not exactly a huge issue.  I'd be more concerned about
stuff in the <head>, because that will delay loading of the article text.

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