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Some papers (especially about Nested Words languages) ofter contain term "language of words". What is the difference between "language" and "language of words"?

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I don't think there is a difference; the author probably wants to insist on the fact that the language is made up of words. – Najib Idrissi May 28 '11 at 11:23
@zulon: I have same suspicion. But: AFAIK they all made up of words -- what is the point? I do not understand. To make things worse, that wording repeats very often, not just once, and without any comments. – Vag May 28 '11 at 11:28
This would be answered more readily at I think it should be migrated. – TheBigO May 28 '11 at 11:31
@TheBigO: They will say "This is not reseach level question". – Vag May 28 '11 at 11:35
up vote 2 down vote accepted

They might be trying to avoid confusion with $\omega$-languages - languages whose elements are infinite sequences of letters ("infinite words"). Such languages have a rich and beautiful theory of their own. I can't think of other possible meanings.

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Oh! Thanks for the pointer; as I already said there are plenty of opportunities to miss entire research areas for every autodidact! – Vag May 28 '11 at 15:17

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