Aryeh Gregor wrote:
> 
> First of all, all auto-generated internal links (in TOCs) will
> automatically switch to the new format.  Second of all, it should be
> one extra line of code to fix up all manually-created internal links
> as well, so that the x is automatically added as part of the encoding
> process.  (I didn't find where this needed to be done at a quick
> glance.)  So we're only talking about external links here.
> 
> This is a one-time cost and I don't think it's a big problem -- at
> worst, a few users will end up on the wrong part of the page.  It
> should be pointed out that this will affect *all* section links on
> non-Latin wikis (since they get encoded to begin with dots and then
> need to start with a letter), but again, only as a one-time cost, and
> only external links (links from external sites or links using external
> link syntax), and it will still get viewers to almost the right place.

A point I haven't seen anyone bring up yet is that, if we're messing 
with section anchors anyway, this would be a good time to try to make 
them less likely to collide with other IDs on the page.

For example, now that we've forced all section anchors to start with an 
ASCII letter, we could go one step further and force them to start with 
an _uppercase_ ASCII letter.  Since most if not all of our other ID 
attributes start with a lowercase letter, this would conveniently place 
the two in separate namespaces.

Of course, other disambiguation methods would also be possible, but the 
uppercase trick strikes me as having minimal impact -- in particular, it 
just happens that most existing section headings on most of our 
Latin-alphabet projects (including by far the largest one, en.wikipedia) 
_already_ begin with a capital letter, and therefore will not be 
affected.  Indeed, this seems to hold even for our biggest project using 
fully case-sensitive page names, Wiktionary.

-- 
Ilmari Karonen

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