What does vim consider to be a word?

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http://unix.stackexchange.com – I do not understand vims definition of a word. From the help for the motion w (:h w): w [count] words forward. |exclusive| motion. These commands move over words or WORDS. *word* A word consists of a sequence of letters, digits and underscores, or a sequence of other non-blank characters, separated with white space (spaces, tabs, ). This can be changed with the 'iskeyword' option. This means when I invoke the w motion, vim needs to check which characters can make up a word with the help of the iskeyword option. So let's check, what characters a word may be comprised o (HowTos)