A hack: it's very easy to modify a .bst file so that it recognises new entry types: simply append lines to the .bst file such as, to make @undocument a synonym for @misc:
FUNCTION { undocument } { misc }
which just means that the function Bibtex calls to produce the .bbl entry for an @undocument just calls the function it uses to produce an @misc entry.
Biblatex does things a little differently, since it passes the type information as follows:
FUNCTION {article} { type$ output:entry }
where output:entry is the generic function used to dump all the information about the record to the .bbl for Biblatex to work with (if you didn't pass the type information, as per the first line, Biblatex would think, e.g., @undocument was an @misc entry).
You can then just clone the site definition of biblatex.bst into your local texmf tree (for Texlive), and add some lines such as:
FUNCTION { undocument } { type$ output:entry }
to your personal version of biblatex.bst. Bibtex will then treat these types just like the other types and you can use them in your bbx/cbx styles.
Postscript
As domwass notes, if you change your version of biblatex.bst in this way, you have to be aware that upgrades might break Biblatex if you use a local fork based on an older version. While most revisions don't introduce incompatible changes to biblatex.bst (there were no changes from 0.9e to 1.3 that would have caused problems, I think), the last revision, 1.4, introduced a very big change in the way biblatex.bst represented information in .bib files that certainly would have required creating a new patched file.
The general idea is inspired by Audrey's answer to With biblatex, is it possible to replace one author of an author list by a bibnamedash or idem string?, but takes a very different approach in the end.
You can control the inserted dash with \bibnamedash, the separator between two of those dashes is \multidashdelim, the last is separated by \finaldashdelim.
\makeatletter
\renewcommand*{\bibnamedash}{\textemdash\textemdash\textemdash}
\newcommand*{\multidashdelim}{\addspace}
\newcommand*{\finaldashdelim}{\finalnamedelim}
\newtoggle{bbx:goahead}
\InitializeBibliographyStyle{\global\csundef{bbx@lastname@1}}
\newbibmacro*{bbx:printlist}[1]{%
\toggletrue{bbx:goahead}%
\printnames[dashed:given-family]{#1}}
\newbibmacro*{dash:delim}{%
\ifnumgreater{\value{listcount}}{\value{liststart}}
{\ifboolexpr{
test {\ifnumless{\value{listcount}}{\value{liststop}}}
or
test \ifmorenames
}
{\multidashdelim}
{\finaldashdelim}}
{}}
\DeclareNameFormat{dashed:given-family}{%
\ifboolexpr{togl {bbx:goahead}
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
{\usebibmacro{dash:delim}\bibnamedash}
{\global\togglefalse{bbx:goahead}%
\ifgiveninits
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiveni}%
{\namepartprefix}%
{\namepartsuffix}}
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiven}%
{\namepartprefix}%
{\namepartsuffix}}}%
\csxdef{bbx@lastname@\the\value{listcount}}{\thefield{hash}}}
\renewbibmacro*{author}{%
\ifboolexpr{ test {\ifuseauthor}
and not test {\ifnameundef{author}} }
{\usebibmacro{bbx:printlist}{author}%
\setunit{\addcomma\space}%
\usebibmacro{authorstrg}}
{\global\csundef{bbx@lastname@1}}}
\renewbibmacro*{bbx:editor}[1]{%
\ifboolexpr{ test {\ifuseeditor}
and not test {\ifnameundef{editor}} }
{\usebibmacro{bbx:printlist}{editor}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{editor}}
{\global\csundef{bbx@lastname@1}}}
\renewbibmacro*{bbx:translator}[1]{%
\ifboolexpr{ test {\ifusetranslator}
and not test {\ifnameundef{translator}} }
{\usebibmacro{bbx:printlist}{translator}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{translator}}
{\global\csundef{bbx@lastname@1}}}
\makeatother
If you want the dash to be able to jump over names, you can just change the line
\ifboolexpr{togl {bbx:goahead}
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
to
\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}
you can then also remove all mentions of bbx:goahead.
MWE
\documentclass{scrartcl}
\usepackage[T1]{fontenc}
\usepackage[american]{babel}
\usepackage{csquotes}
\usepackage[style=authortitle,
maxbibnames=999,
backend=biber,
sorting=nyt,
abbreviate=false]{biblatex}
\makeatletter
\renewcommand*{\bibnamedash}{\textemdash\textemdash\textemdash}
\newcommand*{\multidashdelim}{\addspace}
\newcommand*{\finaldashdelim}{\finalnamedelim}
\newtoggle{bbx:goahead}
\InitializeBibliographyStyle{\global\csundef{bbx@lastname@1}}
\newbibmacro*{bbx:printlist}[1]{%
\toggletrue{bbx:goahead}%
\printnames[dashed:given-family]{#1}}
\newbibmacro*{dash:delim}{%
\ifnumgreater{\value{listcount}}{\value{liststart}}
{\ifboolexpr{
test {\ifnumless{\value{listcount}}{\value{liststop}}}
or
test \ifmorenames
}
{\multidashdelim}
{\finaldashdelim}}
{}}
\DeclareNameFormat{dashed:given-family}{%
\ifboolexpr{togl {bbx:goahead}
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
{\usebibmacro{dash:delim}\bibnamedash}
{\global\togglefalse{bbx:goahead}%
\ifgiveninits
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiveni}%
{\namepartprefix}%
{\namepartsuffix}}
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiven}%
{\namepartprefix}%
{\namepartsuffix}}}%
\csxdef{bbx@lastname@\the\value{listcount}}{\thefield{hash}}}
\renewbibmacro*{author}{%
\ifboolexpr{ test {\ifuseauthor}
and not test {\ifnameundef{author}} }
{\usebibmacro{bbx:printlist}{author}%
\setunit{\addcomma\space}%
\usebibmacro{authorstrg}}
{\global\csundef{bbx@lastname@1}}}
\renewbibmacro*{bbx:editor}[1]{%
\ifboolexpr{ test {\ifuseeditor}
and not test {\ifnameundef{editor}} }
{\usebibmacro{bbx:printlist}{editor}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{editor}}
{\global\csundef{bbx@lastname@1}}}
\renewbibmacro*{bbx:translator}[1]{%
\ifboolexpr{ test {\ifusetranslator}
and not test {\ifnameundef{translator}} }
{\usebibmacro{bbx:printlist}{translator}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{translator}}
{\global\csundef{bbx@lastname@1}}}
\makeatother
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@BOOK{bookABC,
author = {Anne Uthor and Enid Blyton and William Riter},
title = {UBR},
date = {1990},}
@BOOK{bookADC,
author = {Anne Uthor and James Joyce and William Riter},
title = {UJR},
date = {1991},}
@BOOK{book1,
author = {Buchautor, Emma-Louise},
gender = {sf},
title = {First Title},
date = {2001}}
@BOOK{book2,
author = {Buchautor, Emma-Louise},
title = {Same female author},
date = {2002}}
@BOOK{book3,
author = {Buchautor, Emma-Louise and van Helsing, Sarah},
gender = {pf},
title = {Same first author whose gender is unspecified},
date = {2003}}
@BOOK{book4,
author = {Buchautor, Emma-Louise and van Helsing, Sarah and Knuth, Donald E.},
gender = {pp},
title = {Same first and second female authors},
date = {2004}}
@BOOK{book5,
editor = {Buchautor, Emma-Louise and van Helsing, Sarah and Knuth, Donald E. and Cicero, Marcus Tullius},
gender = {pp},
title = {Same leading names of mixed genders},
date = {2005}}
@BOOK{book6,
editor = {van Helsing, Abraham},
title = {Different name},
date = {2006}}
@BOOK{book7,
author = {van Helsing, Abraham},
gender = {sm},
translator = {van Helsing, Abraham},
title = {Same male name},
date = {2007}}
@BOOK{book8,
editor = {van Helsing, Abraham and Jackson, Tom},
gender = {pm},
translator = {Cicero, Marcus Tullius},
title = {Same first male author},
date = {2008}}
@BOOK{book9,
author = {van Helsing, Abraham and Jackson, Tom},
title = {Same male names},
date = {2009}}
@BOOK{book10,
author = {van Helsing, Abraham and Jackson, Tom},
gender = {pm},
title = {Same authors of unspecified gender},
date = {2010}}
@article {JMOR:JMOR10504,
author = {Markey, Molly J. and Marshall, Charles R.},
title = {Linking form and function of the fibrous joints in the skull: A new quantification scheme for cranial sutures using the extant fish Polypterus endlicherii},
journal = {Journal of Morphology},
volume = {268},
number = {1},
doi = {10.1002/jmor.10504},
pages = {89--102},
date = {2007-01},
}
@article {markey:pnas,
author = {Markey, Molly J. and Marshall, Charles R.},
title = {Terrestrial-style feeding in a very early aquatic tetrapod is supported by evidence from experimental analysis of suture morphology},
journal = {Proceedings of the National Academy of Sciences},
volume = {104},
number = {17},
doi = {10.1073/pnas.0701706104},
pages = {7134-7138},
date = {2007-04},
}
@article {Markey2085,
author = {Markey, Molly J. and Main, Russell P. and Marshall, Charles R.},
title = {\emph{In vivo} cranial suture function and suture morphology in the extant fish \emph{Polypterus}: implications for inferring skull function in living and fossil fish},
volume = {209},
number = {11},
pages = {2085--2102},
year = {2006},
doi = {10.1242/jeb.02266},
journal = {Journal of Experimental Biology},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\nocite{*}
\printbibliography
\end{document}
We can make this a bit more safe if we use
\newcounter{bbx:currnames}
\newcounter{bbx:lastnames}
\newbibmacro*{bbx:printlist}[1]{%
\setcounter{bbx:currnames}{0}%
\toggletrue{bbx:goahead}%
\printnames[dashed:given-family]{#1}%
\setcounter{bbx:lastnames}{\value{bbx:currnames}}}
a new macro dash:cleanup that can be implemented as
\newbibmacro{dash:cleanup}{\setcounter{bbx:lastnames}{0}}
and is used as
\InitializeBibliographyStyle{\usebibmacro{dash:cleanup}}
\renewbibmacro*{author}{%
\ifboolexpr{ test {\ifuseauthor}
and not test {\ifnameundef{author}} }
{\usebibmacro{bbx:printlist}{author}%
\setunit{\addcomma\space}%
\usebibmacro{authorstrg}}
{\usebibmacro{dash:cleanup}}}
\renewbibmacro*{bbx:editor}[1]{%
\ifboolexpr{ test {\ifuseeditor}
and not test {\ifnameundef{editor}} }
{\usebibmacro{bbx:printlist}{editor}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{editor}}
{\usebibmacro{dash:cleanup}}}
\renewbibmacro*{bbx:translator}[1]{%
\ifboolexpr{ test {\ifusetranslator}
and not test {\ifnameundef{translator}} }
{\usebibmacro{bbx:printlist}{translator}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{translator}}
{\usebibmacro{dash:cleanup}}}
You will then have to change the
\ifboolexpr{togl {bbx:goahead}
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
in dashed:given-family to the slightly longer
\ifboolexpr{togl {bbx:goahead}
and not test {\ifnumgreater{\value{listcount}}{\value{bbx:lastnames}}}
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
Another clean-up solution is
\makeatletter
\newtoggle{bbx:goahead}
\newcounter{bbx:currnames}
\newcounter{bbx:lastnames}
\renewcommand*{\bibnamedash}{\textemdash\textemdash\textemdash}
\newcommand*{\multidashdelim}{\addspace}
\newcommand*{\finaldashdelim}{\finalnamedelim}
\InitializeBibliographyStyle{\usebibmacro{dash:cleanup}{0}}
\newbibmacro*{bbx:printlist}[1]{%
\setcounter{bbx:currnames}{0}%
\toggletrue{bbx:goahead}%
\printnames[dashed:given-family]{#1}%
\usebibmacro{dash:cleanup}{\value{bbx:currnames}+1}%
\setcounter{bbx:lastnames}{\value{bbx:currnames}}}
\newbibmacro*{dash:delim}{%
\ifnumgreater{\value{listcount}}{\value{liststart}}
{\ifboolexpr{
test {\ifnumless{\value{listcount}}{\value{liststop}}}
or
test \ifmorenames
}
{\multidashdelim}
{\finaldashdelim}}
{}}
\DeclareNameFormat{dashed:given-family}{%
\addtocounter{bbx:currnames}{1}%
\ifboolexpr{togl {bbx:goahead} and not test \iffirstonpage
and test {\iffieldequalcs{hash}{bbx@lastname@\the\value{listcount}}}}
{\usebibmacro{dash:delim}\bibnamedash}
{\global\togglefalse{bbx:goahead}%
\ifgiveninits
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiveni}%
{\namepartprefix}%
{\namepartsuffix}}
{\usebibmacro{name:family-given}
{\namepartfamily}%
{\namepartgiven}%
{\namepartprefix}%
{\namepartsuffix}}}%
\csxdef{bbx@lastname@\the\value{listcount}}{\thefield{hash}}}
\newbibmacro{dash:cleanup}[1]{%
\ifnumgreater{\value{bbx:lastnames}}{#1}
{\global\csundef{bbx@lastname@\the\value{bbx:lastnames}}%
\addtocounter{bbx:lastnames}{-1}%
\usebibmacro{dash:cleanup}{#1}}
{}}
\renewbibmacro*{author}{%
\ifboolexpr{ test {\ifuseauthor}
and not test {\ifnameundef{author}} }
{\usebibmacro{bbx:printlist}{author}%
\setunit{\addcomma\space}%
\usebibmacro{authorstrg}}
{\usebibmacro{dash:cleanup}{0}}}
\renewbibmacro*{bbx:editor}[1]{%
\ifboolexpr{ test {\ifuseeditor}
and not test {\ifnameundef{editor}} }
{\usebibmacro{bbx:printlist}{editor}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{editor}}
{\usebibmacro{dash:cleanup}{0}}}
\renewbibmacro*{bbx:translator}[1]{%
\ifboolexpr{ test {\ifusetranslator}
and not test {\ifnameundef{translator}} }
{\usebibmacro{bbx:printlist}{translator}%
\setunit{\addcomma\space}%
\usebibmacro{#1}%
\clearname{translator}}
{\usebibmacro{dash:cleanup}{0}}}
\makeatother
In any case you could want to add a and not test \iffirstonpage to the \ifboolexpr in dashed:given-family.
Best Answer
Either replace
\iflistundef{author}with\ifnameundef{author}in your driver redefinition or simply use Google as a corporate author. Corporate author names are just wrapped in braces. See below for an example.