bnf to bison grammar

[babar haq]

never knew its so easy to get help from a mailing list:)
my only problem is to convert this kind of bnf to bison
proto-version = "v=" 1*DIGIT CRLF
The operator "*" preceding an element indicates repetition. The full form is:

        <a>*<b>element

where <a> and <b> are optional decimal values, indicating at least <a> and at 
most <b> occurrences of element.
hope some one can help me with it
-- 

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