Template:Parsable/doc

This template determines whether its first parameter can be parsed by parser function #titleparts.

Usage

 * &lt;parameter&gt;

asks #titleparts to extract the second part of &lt;parameter&gt;. It returns true (i.e., non-blank) iff this request produces something different from &lt;parameter&gt;. If &lt;parameter&gt; is blank, the result of the test is false (because &lt;parameter&gt;  then returns a blank string, which is not different from &lt;parameter&gt;).