# Defining [keine Autorenangabe] so that it will be typeset in an author choosen place in the bibliography (biblatex)

badroit (supported by PLK) pointed out a way to create a makro to obtain an [ohne Autorenangabe] (english "no credits") output by using this (see Biblatex: Defining author = {} so that it leads to [Keine Autorenangabe] (engl. "no credits") in the output):

@string{unknown= {{[Ohne~Autorenangabe]}}}


in combination with

@book{example,
author = {},
title = {Meaning of it},
year = 1998,
}


Output: [ohne Autorenangabe] (1998): Meaning of it.

When I was using this, I realised that the entry is not in a good position in the bibliography. It is typeset between n and p entries following an alphabetical order.

My question: Is it possible to define the position of the entry? For example, that these entries occure in the beginning (or end) of the bibliography?

-

With the version 1.7 of biblatex the new entry xdata was defined. The entry requires biber but allows you to set the Ohne~Autorenangabe with sortname

\documentclass{article}
\usepackage[style=authoryear,backend=biber]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@XData{unknown-author,
author={{[Kein~Autorenangabe]}},
sortname={AAAAAA},
}

@book{example,
xdata = {unknown-author},
title = {Meaning of it},
year = 1998,
}

@Book{companion,
hyphenation     = {american},
sorttitle   = {LaTeX Companion},
author      = {Goossens, Michel and Mittelbach, Frank and Samarin, Alexander},
indextitle      = {LaTeX Companion, The},
title       = {The LaTeX Companion},
shorttitle      = {LaTeX Companion},
edition     = {1},
date        = {1994},
pagetotal   = {528},
annotation      = {A book with three authors. Note the formatting of the author list. By default,
only the first name is reversed in the bibliography}
}
@Article{weinberg,
author      = {Weinberg, Steven},
title       = {A Model of Leptons},
journaltitle    = {Phys.~Rev.~Lett.},
volume      = {19},
date        = {1967},
pages       = {1264--1266}
}
\end{filecontents}