CZ:Proposals/Disambiguation mechanics

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For now, the proposal record can be found in the new proposals queue.

Driver: J. Noel Chiappa

Complete explanation

All articles/names which have multiple potential meanings (i.e. need disambiguation) will be handled as follows:

• The disambiguation page (i.e. the page that lists all the potential meanings, and provides links to the articles, for those for which we have articles) should be at "{foo} (disambiguation)" (where {foo} is the name in question).

• A redirect should always be placed at the main "{foo}" location; i.e. with no article actually at "{foo}", not even the main meaning. That redirect will normally point at the disambiguation page (see discussion below for possible exceptions). It will also be placed in a category, to allow all such disambiguation redirects to be easily found.
  • The talk page of the redirect should always be redirected to the talk page of the disambiguation page; that way, discussion of any issues related to the redirect will all be in only one location.

• All "foo" articles should be at pages of the form "{foo} (song)", "{foo} (automobile)", etc; i.e. disambiguated by a modifer enclosed in ()'s.

Reasoning

Always having a redirect at "{foo}" enables us to quickly check for pages which have been linked to "{foo}" without the writer of those pages having checked to make sure they have linked to the correct page for whichever meaning of "{foo}" they wanted.

If the disambiguation page is always at "{foo} (disambiguation)", and there is always a redirect at "{foo}", then all links to "{foo}" are automatically 'wrong' (although they might accidentally wind up at the right page - see below), therefore making it totally trivial to find the pages that need to be fixed.

On a periodic basis, the 'What links here' of all such redirects should be checked, and all articles linking to it updated to link to the correct page. With this scheme, there is no 'build up' of 'legitimate' entries in the 'What links here' to wade through, since there are no such 'legitimate' entries.

The reason why we don't want the main content at "{foo}" is that with a popular page like tree, it's impossibly painstaking to go click on every entry in itsWhat links here, and look through all the text of each page in that list to find all the references to tree, to make sure they are all to the arboreal "tree", as opposed to someone who wanted, say, a 'tree data structure'.

Even worse, even were such a painstaking sweep performed, after some time had passed, the list might again contain erroneous links - with no way to sort them out from the mass of previously checked links (since there is no 'History' for 'What links here').

Although the redirect at the 'main' name (e.g. tree) would generally point to the disambiguation page (so that for readers of articles which link to the ambiguous title, they are at most one click away from the article they want), we might make some exceptions. In some cases, where one meaning is much more common than others, we could set that redirect to point directly to the article on the primary meaning; that article would contain a link to the disambiguation page at the top of the article (e.g. For other meanings, see tree (disambiguation)). This would still provide most of the benefits of this proposal (i.e. making it very easy to find articles which have linked to ambiguous article titles), but be a little more user-friendly in the case of erroneous links to an ambiguous term, in that in most such cases, the extra click would not be needed.

The reason why we shouldn't have the disambiguation at "{foo}" is that for many disambiguation pages, there are some meanings of "{foo}" which don't have articles, and linking to the disambig page is the right thing (since the meaning is defined there). E.g. for "hack", some of the meanings don't have pages (e.g. party hack), and so some pages might legitimately link to "hack (disambiguation)", e.g. an article on Soviet art.

So even a disambig page can have legitimate links to it, and if we had the disambig page at "{foo}", when 'What links here' for the page was examined, there would still be a mix of legitimate links, and bogus ones (where someone was lazy, and linked to "{foo}", without checking to see what they got).

However, if the disambiguation page is always at "{foo} (disambiguation)", then all links to "{foo} (disambiguation)" are automatically good.

Background

This proposal is based on a great deal of practical experience (principally at Wikipedia), and was originally proposed there some time ago; time has not changed those conclusions.

So many instances of the kind of problems with the Wikipedia style of disambiguation pages have been seen that it's amazing that Wikipedia still uses their existing system.

Some of those with Wikipedia experience have either regularly 'cleaned' disambig pages they created, or tried to clean up other ones, and it's always a fair amount of work. The most annoying thing is that one can go fix them all - and go back some months later and they are more erroneous links, and one has to go check them all, all over again, because one usually doesn't remember any more which ones were legitimate, and which ones are not. And there's no history on "What links here" one can use, to call out only the ones that have been added since the last time it was checked!

Implementation

Unlike Wikipedia, where a jillion pages already use the old way, we still have a manageable problem on our hands. Since this is not a technical change, merely a change to usage, there is no need to have a 'flag day' where we fix all the old pages. People can fix them as they run across them, and have the time and energy to do so.

There is, however, no reason to keep making more of them, so if we adopt this, we should spread the word about the new policy, to prevent making unnecessary work for us (by creating things we will later have to fix up).

Using the same reasoning ('don't make the hole any deeper'), we should try and fairly quickly move all amniguously-named article pages to their new, disambiguated names (that's all that's absolutely needed - the redirect will maintain all the existing links to that name, until such time as someone gets around to fixing them). That way, new links to those articles go to the new name, and won't need to be corrected later.

Implementation details

• All the redirects to the disambiguation page will be tagged with a template, which adds them to a category, so it's easy to find them all to check them. (The reason it's via a template, as opposed to directly, is that that allows us to change what we do with these redirects without editing every last redirect.) The redirects will look like this:

#Redirect [[Foo (dismabiguation)]] {{dabredir}}

• All pages which are the 'main' meanings, and have the redirect at the base term pointing to them, will have a template (name not yet picked) at the head of them, which says something like:

For other meanings of Foo, see Foo (disambiguation)

• All such 'main' meaning redirects will be tagged with a similar template, {{mainredir}}, which tags them with a (different) category.

• All disambiguation pages should be tagged with the {{disambig}} template, which in addition to a standard header, tags them with a category.

Implementation issues

There aren't very many implementation issues.

• What to call the category all the redirects to disambiguation pages are placed in? I would suggest "Disambiguation Redirects".

• What to call the category all the redirects to main pages are placed in? I would suggest "Main-meaning Redirects".

• What should the header template placed on such main articles be called? Should it add the articles to a category, and if so, what should it be called? (This decision can easily be changed later, simply by changing the template, so it's not super-urgent that it be decided, or decided correctly.)

Open issues

There aren't really very many open issues in this.

• Probably the biggest one is 'when do we grant an exception to allow the redirect to point to the main meaning, instead of the disambiguation page'? I would suggest that this is probably something to be decided on a case-by-case basis (the issue to be discussed, and settled, on the talk page of the disambiguation page), with the general guideline that one particular meaning should be preferred only when it is overwhelmingly the most popular meaning. Or is this likely to lead to too many interminable debates? If so, we could simply say that it always has to point to the disambiguation page, or say that a Constable gets to make a decision which is binding, saving an appeal to e.g. the Editorial Council.

• Do we want to bother having all the articles in a 'disambiguation group' have a header on them that says something of the form 'For other meanings of Foo, see Foo (disambiguation)'? I would say no, because people shouldn't be on such a page unless they deliberately went there, or were sent there, not as a result of confusion. However, I don't have a strong bias against doing so; if people want to do so, that would be fine with me. (If so, however, it should be via a different template, so we can separate out the 'main' meaning articles from the 'subsidiary' meaning ones.)

• Some people will no doubt be offended at having to title the article on trees at "Tree (plant)". I had proposed on the Forums that we separate page-names from article titles, but a few people strongly disliked this idea. If we had that technical capability, we could of course avoid this issue entirely. Without it, however, we are forced to chose one of either i) ugly article titles, or ii) widespread links to the wrong page (as on Wikipedia), and to me the former is the lesser of two evils - especially as we are already living with that evil in article titles like "Charles I (Spain)".

• What to do with "{Foo}/Definition"? Should it then always (perhaps with the same exceptions as above) read "Can have several meanings, summarized at Foo (disambiguation)"? Or should it not exist at all?

Discussion

• YES! I am coming out strongly in favor of this proposal. Despite the nuisance of having articles with names like "Tree (plant)", it is necessary to do something for topics which have important articles in completely different disciplines. "Tree" is a good example, because a "tree" is an important concept in computer science and mathematics. Without such a policy, there will inevitably be disagreements about which article gets top billing, i.e., sits at "Tree".Pat Palmer 15:23, 13 May 2008 (CDT)

• I too support this proposal. I especially agree with the redirect from {foo} to {foo} (disambig). It helps separate good links from "bad" links, which could help prevent confusion in many cases. My only question is this: Who decides (or rather, what will the standard be) on how to distinguish articles? I know this is a bad example, but would the article Victoria be changed to Victoria (Queen), Victoria (British queen), or Victoria (Royalty)? And why? I think there should be clear guidelines and standards to prevent confusion before this gets put into effect. John Dvorak 15:39, 14 May 2008 (CDT)

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