Template:RRcatNote

   ■ Photos of 'static' or 'standing' partial trains without a locomotive (technically 'uncoupled consists' in rail road terminology) should be categorized in category:Train consists or one of it's sub-categories; those with a loco, as a Trains sub-category.
•  Photos of or featuring 'single' train cars (train wagons in UK English railway terminology) should be categorized under category:Traincar types, category:Rolling stock, category:Locomotives or one or more of their appropriate sub-categories. Steam locos and tenders should be listed in Locomotives and consists.
•  whilst train consists in motion, 'non-static' or moving trains—no matter how short, should be sorted into one of the specific sub-categories of the main category, Trains (an over-populated main category).
•  Passenger yard scenes are properly classified best into a sub-category of category:Train stations, whilst rail yards goto 'rail yards in country' sub-categories of category:Rail yards by country.

usage

This template produces the boilerplate 'how-to-classify' message above for use as a notice on the many Railroad category pages.  

• The named parameter titleline can be defined (|titleline=...) to insert a message line ahead of the boilerplate text, you may need to add font size and line control html/wiki-markup coding when defined.

 

• The default parameters {{{1}}}, {{{2}}}, and {{{3}}} (or |1=, 2=, 3=) can be defined and will append after the text message displayed above but within the smaller font size matching the messagebox style if and when any are defined.

 

• The parameter 'footer' can be defined (|footer=...) to insert a message line ahead of the boilerplate text, you may need to add font size and line control html/wiki-markup coding when it is defined