purpose
Auto-categorize general use template (utilities) to category:Self-documenting templates.
usage
Place on a page to auto-categorize the page to category:Self-documenting templates
exported and adapted
2015-0321 From {{SelfTdoc}} (Trainz Wikibook) to split the category to those useful only in Trainz and those which are more broadly useful in other projects, matching split in the auto-categories.