Last modified: 2007-08-19 09:27:15 UTC
The text in Special:Attributes is misleading, it says:
The following attributes exist in the wiki.
but that's not true. If there are problems with an attribute page, or the pages using an attribute, then an attribute won't show up in Special:Attributes, even though the attribute has a page and appears in Special:Pages. This confuses users.
Better, more accurate text is:
The wiki has pages using the following attributes.
The same is true for Special:Relations (though relations cause fewer problems).
Maybe this problem goes away with new properties system!
With the new properties comes a new implementation of the related special pages. Now all properties that are used somewhere (whether or not declared correctly) are shown. Properties that still will not appear are the following:
* Properties that have a property page but are not used on any page (these can be found on another special page for unused properties). This is the same as for categories.
* Properties that have a page that gives a special datatype, but that are used only wrongly throughout the wiki. This means that *all* values that have been given to the property throughout the wiki are invalid under the datatype (e.g. the type expects a number but no number was given). Then nothing can be stored and the property will also appear only as "unused property".
The second case should be reasonably rare and is also reflected by error messages in the factboxes of the respective articles.