From Fedora Project Wiki

This template is used to insert rows in a table of usage guidelines. The writer needs to provide the table opening and closing tags, like this:

{|
{{UsageGuideline | Statement of rule 1. | Examples that follow rule 1. | Examples that do not follow rule 2.}}
{{UsageGuideline | Statement of rule 2. | Examples that follow rule 2. | Examples that do not follow rule 2.}}
...
|}