# Colon (:) instead of period (.) after author with biblatex, alphabetic

With biblatex, alphabetic style, I have

<author>. <title>

But I want to have a colon ":" instead of the period "." after the author:

<author>: <title>

What do I have to change?

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I refurbished your question a bit, hope you don't mind. – doncherry Jan 7 '12 at 15:20