The following has been created only as an attempt to get Semantic Mediawiki functions working, and needs to be in the "Property" namespace. The content here can be ignored.
For example, the page for Property:Population would specify [[has type::Number]]. "Has type" assumes its value is in the Type namespace, so you can omit the prefix Type:.
From version 1.0 to 1.4, SMW allowed many-valued properties. Types for these properties are specified by listing multiple types as the value of Has type, separated by semicolons.
Starting with version 1.5, many-valued properties were replaced by the type Record.