In :help using-<Plug> a suggestion is given as to how to name the left hand side of a <Plug> mapping:

To make it very unlikely that other plugins use the same sequence of characters, use this structure: <Plug> scriptname mapname
In our example the scriptname is "Typecorr" and the mapname is "Add". We add a semicolon as the terminator. This results in "TypecorrAdd;".

but I don't understand what the purpose of the ; is.

1 Answer 1


If I understand the given example correctly, the purpose of that semicolon is to visually separate the <Plug> mapping from any subsequent command, as in the imaginary:

nmap xx <Plug>FooBarx    " Is it 'rx' at the end?
nmap xx <Plug>FooBar;x   " Oh… OK I guess

But I don't think that's a particularly good pattern, mostly because ; is a legitimate command, which can lead to more confusion. And it is only provided as an example anyway, not as a guideline. The name doesn't have to be in PascalCase and it doesn't have to end with a semicolon either.

AFAIK, the most common real world pattern is actually to wrap the name in parentheses:

" etc.

which makes boundaries very clear and non-ambiguous, in a "it starts here and it ends there" kind of way:

nmap xx <Plug>(FooBar)x

Note that the parentheses are not some obscure vimscript expression thing, they are literally part of the name so you can be creative:

" etc.

at the risk of puzzling both your users and your fellow community members trying to help.

You should stick with the parentheses.

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