Editing Module:Check for unknown parameters/doc (section)

== Parameters ==
* <code>arg1</code>, <code>arg2</code>, ..., <code>argN</code>, are the known parameters.
* Unnamed (positional) parameters can be added too: <code>|1|2|arg1|arg2|...</code>.
* [[:mw:Extension:Scribunto/Lua reference manual#Patterns|Lua patterns]] (similar to [[regular expression]]s) usage with parameters is also supported (such as: {{para|regexp1|header[%d]+}}, {{para|regexp2|date[1-9]}}, {{para|regexp3|data[%d]+[abc]?}}). This is useful when there are many known parameters which use a systematic pattern.
* {{para|unknown}} – what happens when an uknown parameter is used. Typically use either a tracking category to place pages that use unknown parameters, or an error.
* {{para|preview}} – the text to be displayed when in preview mode and an unknown parameter is used.
* The <code>_VALUE_</code> keyword, if used, will be changed to the name of the parameter. This is useful for either sorting the entries in a tracking category, or for provide more explicit information.
* {{para|ignoreblank|1}} – by default, the module makes no distinction between a defined-but-blank parameter and a non-blank parameter. That is, both unlisted {{Para|foo|x}} and {{Para|foo}} are reported. To only track non-blank parameters use {{para|ignoreblank|1}}.
* {{para|showblankpositional|1}} – by default, the module ignores blank positional parameters. That is, an unlisted {{para|2}} is ignored. To {{em|include}} blank positional parameters in the tracking use {{para|showblankpositional|1}}.