[Tagging] Wiki Edit War on using/avoiding semicolon lists

[Никита]

> key[1]=value1 key[2]=value2
> and returning to the semicolon mode on the output again. That would
probably help avoid too much regexping.

I see your point, but sadly this is not solution. I was always mentioning
xxx:yyy scheme as *semantic subkeys*, there no semantic in:
key[1] - what does 1 mean? nothing. There no wiki page about it. Even there
page for it, how do you memorize them?

In contrast to this, my suggestion work decently, but it may look too
verbose at first:
color:yellow=yes
color:red=yes

Back your example, how do you query for yellow?
key[1]=*?
key[2]=*?

Okay you know the answer, this is your indexes. But how do you know that?
At first it seems like good idea, but sadly not solution to the question,
instead of regexes you have to deal with meaningless numeric indexes in
keys.

PS. We need arrays/native multivalued support for values in key=value tags
anyway. There native arrays in PostgreSQL but I'm not sure if it will be
good idea to adapt them, this will be only up to back-end developers, not
about tagging.
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