Consider these Tag info pages:

For either of these 2 pages, in the right column, it shows the typical Stats for each tag, i.e:

  • Created.
  • Viewed.
  • Active.
  • Editors.

But, have a closer look at the "Created" part of those stats on the Tag info page:

  • for the tag, it includes a link to the userid who created it.
  • for the tag, it does not includes such link to the userid who created it.

My question: What's the logic to yes or no include such link to the userid who create a tag?

PS: the 2 tags in my question are pretty much random picked: here on meta.SE there are plenty of tags like , while there are also plenty of tags like . Moreover, I've noticed similar cases in various other SE sites. Here are a few of them (from Drupal.SE):

  • 1
    It's even deeper. Two more bugs: the time in "Created" is wrong, showing the time when the site was created, while the tooltip is correct. And even worse, the "Created by" in the bounty tag is wrong, that user never even edited the tag wiki. No idea how his name appears there. There are probably several very old bugs here. – ShaWiz Feb 13 '18 at 10:36
  • [cont] The first revision of the bounty tag, which actually created it, was suggested by this user and approved by this other user. Neither of those are listed as the tag creators. – ShaWiz Feb 13 '18 at 10:38
  • Bonjour @ShadowWizard ! Interested additional discoveries in your (first) comment. Though I don't quiet understand (yet) what you mean, ie WHERE you see that "time". But: could it be that you're misinterpreting things (sorry to doubt ...). I.e. it's one thing to CREATE a tag (eg: empty at the very start), and another thing to either create a tag wiki or tag wiki excerpt. Or am I still missing something in your previous comment(s)? – Pierre.Vriens Feb 13 '18 at 10:41
  • @ShadowWizard but the tag itself was indeed created by VonC, as the tag page says: 8 years, 7 months ago by VonC. – fedorqui Feb 13 '18 at 10:41
  • @fedorqui oh, the first question with the tag... right. So the tooltip is wrong, showing the time of the first tag edit. Meh, it's all super confusing. – ShaWiz Feb 13 '18 at 10:45
  • To sum things up: there is a mix between tag creation, and tag wiki creation, as when tag is created, it's created with empty wiki, which is later edited. So part of the stats are about the first edit, and some about the tag itself, not the wiki. – ShaWiz Feb 13 '18 at 10:48
  • @Shadow I think it is more reasonable to keep track of who created the tag instead of who created the wiki page of the tag, and this seems to be what is implemented right now. But yes, since it later on says editors then this part is about the wiki page itself :S – fedorqui Feb 13 '18 at 10:49
  • @Sha the mixed up date tooltip is probably due to this only being half fixed: "created" date and user displayed on tag wiki refer to different events (i.e. they fixed the shown date but forgot the tooltip) – Cai Feb 13 '18 at 10:52
  • @ShadowWizard : Regarding the time in "Created" is wrong, showing the time when the site was created, while the tooltip is correct, there is already a bug reported by me. – Arulkumar Feb 13 '18 at 11:00

From Show a tag's creator on the tag wiki page:

If a tag has a related Taxonomist badge, the creator will now be shown on its tag wiki/info page.

So the creator is taken from the owner of the taxonomist badge associated with that tag. If there is no taxonomist badge (e.g. the tag has less than 50 questions) or no user with that badge (e.g. if the user no longer exists) then a creator won't be shown.

Note that tags are only created once; if a tag is deleted (e.g. removed from all questions and automatically removed from the system) then recreated at a later date, the original creator of the tag is still the "creator" of the tag (see e.g. Taxonomist Badge - Who's the owner?)

If we go through the tags you listed...

The only anomaly is...

  • Interesting answer. I need more time to "digest" it, but if this would be the correct answer, then how would that explain the current situation for the flags tag (on Drupal.SE) ... with current 421 questions using this tag ... but NO userid mentioned? – Pierre.Vriens Feb 13 '18 at 11:51
  • @Pierre.Vriens see my update, there is no taxonomist badge for that tag. Not sure why that is, but that is why no creator is listed – Cai Feb 13 '18 at 12:04
  • Hey @Cai, your answer definitely goes in the right direction (= part of the puzzle?). But could it be that this taxonomist-related logic applies to cases where "at first" (when the tag was created) there is no userid mentioned (due to the lack of privilege, as in my own answer). And if later on a taxonomist user appears, then (and only then) it gets added. But then what happens if (eg) some day a taxonomist appears for a tag that already had (from the beginning) a userid mentioned. Eg for group tag: would a group-taxonomist then REPLACE username "adrian"? – Pierre.Vriens Feb 13 '18 at 12:12
  • @Pierre.Vriens you're thinking too much about it.... if there is a taxonomist that user is shown, if there isn't then nothing is shown, it's as simple as that. (unless you've got an example that shows otherwise, which I don't see) – Cai Feb 13 '18 at 12:14
  • 1
    Regarding the flags tag, it looks like it was introduced on Apr 10'11 by a user that got the Taxonomist badge a bit later for another, unknown, tag. Since the Taxonomist badge is awarded just once, counting on its information to track the creator seems quite buggy. – fedorqui Feb 13 '18 at 12:43
  • OK, with the additional comment from @fedorqui here, it seems that this answer is, pretty sure, the explanation for what my question is about. I did some extra checking for other tags, and cannot find any contradiction of this. So until further notice (cfr "unless you've got an example that shows otherwise ..."), I'm going to mark this as accepted ... – Pierre.Vriens Feb 13 '18 at 13:27
  • Just in case anybody is looking for a similar case like the "flags" tag ... The "8" (currently used in "only" 9270 questions ...) seems to suffer a similar issue. Same kind of bug, or yet another variation? – Pierre.Vriens Feb 13 '18 at 13:39
  • @Pierre the tag was created by a user that no longer exists: drupal.stackexchange.com/revisions/7209/1 ...as fedorqui said, taxonomist just isn't a very good way to determine who created a tag, there will be countless tags with no creator listed – Cai Feb 13 '18 at 13:43
  • @Cai merci for that clarification also. and I fully agree with you on that ... PS: from now on I'll think twice when I see somewhere "created", similar to when I see "deleted" of something (BTW: DELETE does not exist in any SE site, it is only a synonym for "hidden from low rep users ..."). – Pierre.Vriens Feb 13 '18 at 13:48

I think this all has to do with the migration from MSO to MSE. They created a whole new site and imported (some of) the data from MSO.

There seems there are more problems. The creator of the tag should be Benny, according to SEDE (select wikipostid from tags where tagname = 'bounty' = 78196, select owneruserid, ownerdisplayname from posts where id = 78196 = 155190, which is Benny. Display name is empty).

The tag seems to check out fine. It is attributed to the Community, which seems reasonable given the background.

On Stack Overflow, the C# tag misses a creator, which has to be Jon Skeet given SEDE (select owneruserid, ownerdisplayname from posts where id = 3607007 yields '22656' and again an empty display name). Maybe this column was added later and not filled in correctly for old posts?

  • ohh... the migration... but still, how come VonC is there? – ShaWiz Feb 13 '18 at 10:42
  • I have no clue. Some messed up migration script? @Sha – Patrick Hofman Feb 13 '18 at 10:43
  • There might be different reasons for different tags. This one seems the most plausible for MSE @Pierre.Vriens – Patrick Hofman Feb 13 '18 at 10:44
  • @PatrickHofman well, turns out VonC asked the first question having that tag, thus creating it. But somehow it's not reflected in other places where it should be. – ShaWiz Feb 13 '18 at 10:46
  • You mean, the first question or the first question that was migrated? @Sha – Patrick Hofman Feb 13 '18 at 10:47
  • First question here. – ShaWiz Feb 13 '18 at 10:50
  • Please review the additional examples I added in my PS. IMO it proofs that the very first phrase of this answer cannot be the explanation. – Pierre.Vriens Feb 13 '18 at 10:58

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