You can use this special property with a property of any datatype to limit its possible values. For example, the page for a Problem severity property might contain:
[[allows value::Enhancement]],[[allows value::Trivial]],[[allows value::Minor]], [[allows value::Normal]],[[allows value::Major]],[[allows value::Critical]]
 Ordered properties
Enumerating several Allows value does not put the possible values of a property in that order; properties of Type:String will still sort in alphabetical order. You can ensure alphabetical sort order is appropriate using a prefix, for example:
[[allows value::a-Enhancement]],[[allows value::b-Trivial]], [[allows value::c-Minor]]...
and then you can query for greater-than-or-equal or less-than-or-equal values, for example [[property name::<c-Minor]]
You can create a property of Type:Number and give it allowed values that are "pseudo-numbers", for example:
[[Allows value::1 - Low]] [[Allows value::2 - Medium]] [[Allows value::2 - Middling]] ...
SMW's number datatype ignores the "- description" after the number. This gives the set of properties a numerical order and lets you make two values equivalent.
Property:Allows value en 1.0
Pages using the property "Allows value"
This property is a special property in this wiki. Showing 9 pages using this property.
|Equipment +||3D Printer +, Arcade +, Brewery +, …|
|Event Type +||Conference +, Symposion +, Talk +, …|
|Exchanges +||yes +, no +, maybe +|
|Hackerspace status +||active +, planned +, building +, …|
|Residencies +||yes +, no +, maybe +|
|What expertise is sought? +||easy +, moderate +, expert +, …|
|What skills are needed? +||design +, invention +, programming +, …|
|What type of employment is it? +||one-shot +, recurrent +, position +|
|Who can apply? +||Anyone +, Local +|