# 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

``````\renewcommand{\labelnamepunct}{\addcolon\space}
(This is better than `\renewcommand{\labelnamepunct}{:\addspace}`, as remarked by domwass.)
It would be better to use `\renewcommand{\labelnamepunct}{\addcolon\space}`, because then unintended whitespace before the colon will be deleted. –  domwass Sep 19 '11 at 12:09
@domwass Right; all those `\add...` commands in biblatex are confusing. –  egreg Sep 19 '11 at 12:13
This works with `verbose` style as well. Question: The `\labelnamepunct` will only be executed after the author entry and nowhere else? –  doncherry Jan 7 '12 at 15:23
@doncherry `biblatex` defines many "punct" commands, so I guess this is specialized for that purpose. –  egreg Jan 7 '12 at 15:47