Sorry, those were poorly chosen examples. Here are some better ones:

Copy_to_Wikimedia_Commons_(bot-assessed) Stub-Class_biography_articles Automatically_assessed_biography_articles WikiProject_Disambiguation_pages Creative_Commons_Attribution-ShareAlike_3.0_files

I don't think that any of these are hidden, at least by looking for them in page_props. These are all from the enwiki-20121201 dump.

Thanks,

Robert

-----Original Message----- From: Petr Onderka [mailto:gsvick@gmail.com] Sent: Wednesday, February 13, 2013 9:34 AM To: Robert Crowe Cc: xmldatadumps-l@lists.wikimedia.org Subject: Re: [Xmldatadumps-l] Housekeeping categories?

Both of the categories you mentioned *are* hidden, so I think you can use that.

Petr Onderka [[en:User:Svick]]

On Wed, Feb 13, 2013 at 6:24 PM, Robert Crowe robert@ourwebhome.com wrote:

Is there any way to distinguish between categories like History, or Literature for example, and what I would think of as categories that are used for internal housekeeping like "Unprintworthy_redirects" or "Nonindexed_pages"? They're not hidden categories, but conceptually there is a clear difference between housekeeping categories and categories that define fields of knowledge. But is there anything in the tables that distinguishes them?

Thanks,

Robert

Copy_to_Wikimedia_Commons_(bot-assessed) Creative_Commons_Attribution-ShareAlike_3.0_files

These contain only files.

Stub-Class_biography_articles Automatically_assessed_biography_articles WikiProject_Disambiguation_pages

These contain only talk pages.

Also, all of them are indirect subcategories of Category:Wikipedia administration.

Neither of these might be easy to find out for your, but I think at least one of them should be doable.

and hope there are not too many loops!

Just 2500 of them. [1]

[1]: http://en.wikipedia.org/wiki/Wikipedia:Dump_reports/Category_cycles

Petr Onderka [[en:User:Svick]]

I tried finding all the subcategories of Category:Wikipedia_administration, but unfortunately that includes many non-administration categories also.

Will administration categories be limited to those that contain only:

- Categories - Files - Talk pages

Or are there other defining characteristics? Or are administration categories simply any category that is not a descendent of Category:Articles?

Thanks,

Robert

-----Original Message----- From: Petr Onderka [mailto:gsvick@gmail.com] Sent: Wednesday, February 13, 2013 1:14 PM To: Robert Crowe Cc: xmldatadumps-l@lists.wikimedia.org Subject: Re: [Xmldatadumps-l] Housekeeping categories?

Copy_to_Wikimedia_Commons_(bot-assessed) Creative_Commons_Attribution-ShareAlike_3.0_files

These contain only files.

Stub-Class_biography_articles Automatically_assessed_biography_articles WikiProject_Disambiguation_pages

These contain only talk pages.

Also, all of them are indirect subcategories of Category:Wikipedia administration.

Neither of these might be easy to find out for your, but I think at least one of them should be doable.

and hope there are not too many loops!

Just 2500 of them. [1]

[1]: http://en.wikipedia.org/wiki/Wikipedia:Dump_reports/Category_cycles

Petr Onderka [[en:User:Svick]]

So if I start at Category:Articles and recurse "downward" into all category members, will it include all pages that are not administration pages? Or do I have to also recurse "upward", keeping in mind that it's a directed graph and not a tree?

Thanks,

Robert

-----Original Message----- From: Federico Leva (Nemo) [mailto:nemowiki@gmail.com] Sent: Saturday, February 23, 2013 1:17 PM To: Robert Crowe Cc: xmldatadumps-l@lists.wikimedia.org Subject: Re: [Xmldatadumps-l] Housekeeping categories?

Robert Crowe, 23/02/2013 21:58:

I tried finding all the subcategories of Category:Wikipedia_administration, but unfortunately that includes many non-administration categories also.

Will administration categories be limited to those that contain only:

• Categories
• Files
• Talk pages

Or are there other defining characteristics?

There are. I doubt there's a precise definition, though.

Or are administration categories simply any category that is not a descendent of Category:Articles?

In theory, yes. But the category tree is not even a tree, so all sorts of things can happen...

Nemo