Template:Invert-property

This template takes a property name and its inverse property name. It queries for the inverse property name and produces wiki text with the inverted annotations.

Usage:

This hides the annotation by specifying blank as the alternate text. Since "| " in a template confuses parsing, it uses a subtemplate Template:Invert-property/Separator for the separator.

See California for use of this template.

(Credit goes to Semantic MediaWiki user DanTMan for this technique.)