Biblatex: bibliography section headings without numbers in scrreprt or scrbook

Question

The following code produces headings on the section level starting with the number of the section before the bibliography:

\documentclass{scrbook}

\usepackage{csquotes}
\usepackage[english]{babel}
\usepackage[style=authoryear]{biblatex}
\bibliography{biblatex-examples}

\begin{document}

\nocite{westfahl:space}\nocite{aksin}\nocite{angenendt}
\nocite{baez/article}\nocite{bertram}\nocite{doody}
\nocite{matuz:doody}\nocite{gillies}\nocite{glashow}
\nocite{herrmann}\nocite{kastenholz}\nocite{reese}
\nocite{sarfraz}\nocite{kant:ku}\nocite{nietzsche:historie}
\nocite{brandt}\nocite{hyman}\nocite{pines}\nocite{moraux}
\nocite{salam}\nocite{cms}\nocite{baez/online}\nocite{ctan}
\nocite{itzhaki}\nocite{markey}\nocite{wassenberg}
\nocite{almendro}\nocite{kowalik}\nocite{laufenberg}
\nocite{sorace}\nocite{jcg}\nocite{chiu}\nocite{padhye}
\nocite{geer}\nocite{loh}

\printbibheading
\printbibliography[notkeyword=secondary,heading=subbibliography,title={Primary Sources}]
\printbibliography[keyword=secondary,heading=subbibliography,title={Secondary Sources}]

\end{document}

The resulting section header is

on the top of page 3 while the header representing the chapter on the top of page 2 is correctly set to "Bibliography". The 0.0 seems wrong. How can I remove it? I tried several combinations with \defbibheading{subbibliography} but I did not succeed. (with biblatex 2.2, biber 1.2)

Answer 1

biblatex.def defines

\defbibheading{subbibliography}[\refname]{%
  \section*{#1}%
  \if@twoside\markright{\sectionmarkformat#1}\fi}

for scrbook and scrreprt, which is responsible for the appearance of the number in the header. It disappears if you write, in your preamble,

\makeatletter
\defbibheading{subbibliography}[\refname]{%
  \section*{#1}%
  \if@twoside\markright{#1}\fi}
\makeatother

It should be probably filed as bug report to the maintainers of biblatex, as \section* is used, so no number should be printed in the header and \sectionmarkformat just prints the section number along with possibly a dot.

Answer 2

EDIT: So I was editing my answer and a better one was posted. See what is wrote by egreg.

If I understand well, you want only the name of the section (here Secondary sources), not the chapter and section numbers. You can do it with a tuning of the bibheading of biblatex with the following lines in your preamble:

\defbibheading{subbibliography}{
  \section*{#1}
  \markright{\itshape #1}
}

With your MWE it works. I don't know if it answers your question.