Again about the @set label for authoryear style

[hushidong]

Again about the @set label for authoryear style

The @set with a label from the first member is really usable in real world.

For example, used in multi-language bibliography for author year style.
sometimes we need to list bib info in different language for the same work, like this:

biblatex v3.7:

biblatex v3.10

the src code is:

\documentclass[twoside]{article}
\usepackage{ctex}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage[backend=biber,style=authoryear]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{egbib.bib}
@Book{易仕和2013--,
  Title                    = {超声速和高超声速喷管设计},
  Address                  = {北京},
  Author                   = {易仕和 and 赵玉新 and 何霖 and 张敏莉},
  Publisher                = {国防工业出版社},
  Year                     = {2013}
}

@Book{Yi2013--,
  Title                    = {Supersonic and hypersonic nozzle design},
  Address                  = {BeiJing},
  Author                   = {Yi, S H and Zhao, Y X and He, L and Zhang, M L},
  Publisher                = {National Defense Industry Press},
  Year                     = {2013}
}
\end{filecontents}
\addbibresource[location=local]{egbib.bib}

\begin{document}

\defbibentryset{bilangyi2013}{易仕和2013--,Yi2013--}
double language citation\cite{bilangyi2013}

\printbibliography
\end{document} 

I found this problem until biblatex updated yesterday, and it works well with biblatex v3.7.

In issue #619: @set still gives odd results for authoryear, authortitle, and verbose styles .

moewew said the behaviour of biblatex 3.7 would cause the problem that a @set cannot be distinguished from the first menber in citation, and the best way for biblatex >3.7 is add a label manually, but its a problem for \defbibentryset.

so i'd like to ask is there a solution via biber sourcemap as plk said.
the goal of sourcemap is to create a label for @set with the first member's label or other user dynamically defined label via a cmd like \defbibentryset or a new cmd related to \defbibentryset.

[moewew]

Thank you for reporting this.

I think in this instance the related functionality would give better results than a @set.

\documentclass[twoside]{article}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage[backend=biber,style=authoryear]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Book{orig--,
  Title                    = {Test},
  Address                  = {Address},
  Author                   = {A and B and C},
  Publisher                = {Publisher},
  Year                     = {2013},
  related                  = {Yi2013--},
}
@Book{Yi2013--,
  Title                    = {Supersonic and hypersonic nozzle design},
  Address                  = {BeiJing},
  Author                   = {Yi, S H and Zhao, Y X and He, L and Zhang, M L},
  Publisher                = {National Defense Industry Press},
  Year                     = {2013}
}
\end{filecontents}
\addbibresource{\jobname.bib}

\begin{document}
double language citation\cite{orig--}

\printbibliography
\end{document} 

(I didn't have the necessary fonts installed, so I dumbed-down the example)

[hushidong]

it is a good method，but there is another problem。

how can I define the relation dynamically？

I donot want to change the bib file statically (where entrys are not related)，because when there is no demand of double-languge bibliography, I have to change it again.

[moewew]

You could use sourcemapping to do this dynamically

\documentclass[twoside]{article}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage[backend=biber,style=authoryear]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@Book{orig--,
  Title                    = {Test},
  Address                  = {Address},
  Author                   = {A and B and C},
  Publisher                = {Publisher},
  Year                     = {2013},
}
@Book{Yi2013--,
  Title                    = {Supersonic and hypersonic nozzle design},
  Address                  = {BeiJing},
  Author                   = {Yi, S H and Zhao, Y X and He, L and Zhang, M L},
  Publisher                = {National Defense Industry Press},
  Year                     = {2013}
}
\end{filecontents}
\addbibresource{\jobname.bib}

\DeclareSourcemap{
  \maps[datatype=bibtex]{
    \map{
      \step[fieldsource=entrykey, match={orig--}, final]
      \step[fieldset=related, fieldvalue={Yi2013--}]
    }
  }
}

\begin{document}
double language citation\cite{orig--}

\printbibliography
\end{document} 

[hushidong]

oh, right!

there can be mutiple DeclareSourcemap,

thanks a lot !

[moewew]

Actually, at the moment there can't be multiple \DeclareSourcemaps, so you will have to combine them. But that will change with in the next release (#227).

[hushidong]

for now mutlitple 'DeclareStyleSourcemap' can be used alternatively?

[moewew]

I think so, yes.

[hushidong]

ok,thanks

[moewew]

Is there anything else we need to do here?

The use case you mention has not really convinced me that it is natural or makes sense to let a @set have the label of its first member, especially since there are better solutions available out of the box.

[hushidong]

No, thanks !
I have transfered to the 'related' solution you proposed above for biblatex >3.7. It is enough for multiple languages bibliography, even for dynamic defining.

There is one question I want to ask. the code \ifnumgreater{\value{bbx:relatedcount}}{0} I modified in bibmacro*{related} has the origin value 1, in that case the first related entry is not separated with \relateddelim after the main entry, is it a mistake in writing or a special dealing for some intents?

\renewbibmacro*{related}{%
  \ifboolexpr{ test {\iffieldundef{related}} or test {\ifrelatedloop} }
	{}
	{\usebibmacro{begrelated}%
	 \def\bbx@tempa{}%
	 \setcounter{bbx:relatedtotal}{0}%
	 \def\do##1{%
	   \entrydata{##1}{%
		 \ifrelatedloop
		   {}
		   {\stepcounter{bbx:relatedtotal}%
			\gappto{\bbx@tempa}{##1,}}}}%
	 \docsvfield{related}%
	 \restorefield{related}{\bbx@tempa}%
	 \ifnumgreater{\value{bbx:relatedtotal}}{0}
	   {\listcsxadd{bbx:relatedloop}{\strfield{entrykey}}%
		\iffieldundef{clonesourcekey}
		  {}
		  {\listcsxadd{bbx:relatedloop}{\strfield{clonesourcekey}}}%
		\setcounter{bbx:relatedcount}{0}%
		\def\do{%
		  \stepcounter{bbx:relatedcount}%
		  \ifnumgreater{\value{bbx:relatedcount}}{0}%modifed from 1
			{\ifcsundef{relateddelim\strfield{relatedtype}}
			  {\printtext{\relateddelim}}
			  {\printtext{\csuse{relateddelim\strfield{relatedtype}}}}}
			{}}%
		\ifbibmacroundef{related:\strfield{relatedtype}}
		  {\appto{\do}{\usebibmacro{related:default}}}
		  {\appto{\do}{\usebibmacro*{related:\strfield{relatedtype}}}}%
		\iffieldformatundef{related:\strfield{relatedtype}}
		  {\def\bbx@tempa{related}}
		  {\def\bbx@tempa{related:\strfield{relatedtype}}}%
		\iffieldformatundef{relatedstring:\strfield{relatedtype}}
		  {\def\bbx@tempb{relatedstring:default}}
		  {\def\bbx@tempb{relatedstring:\strfield{relatedtype}}}%
		\printtext[\bbx@tempa]{%
		  \usebibmacro{begrelatedloop}%
		  \iffieldundef{relatedstring}
			{\ifboolexpr{
			   test {\ifnumgreater{\value{bbx:relatedtotal}}{1}}
			   and
			   test {\ifbibxstring{\thefield{relatedtype}s}}
			 }
			   {\printtext[\bbx@tempb]{%
				  \bibstring[\mkrelatedstring]{\thefield{relatedtype}s}}}
			   {\iffieldbibstring{relatedtype}
				  {\printtext[\bbx@tempb]{%
					 \bibstring[\mkrelatedstring]{\thefield{relatedtype}}}}
				  {}}}
			{\iffieldbibstring{relatedstring}
			   {\printtext[\bbx@tempb]{%
				  \bibstring[\mkrelatedstring]{\thefield{relatedstring}}}}
			   {\printfield[\bbx@tempb]{relatedstring}}}%
		  \docsvfield{related}%
		  \usebibmacro{endrelatedloop}}}%
	   {}%
	 \usebibmacro{endrelated}}}

[moewew]

Can you please open a new issue with a full MWE we can run for the relateddelim issue? I.e. an issue that showed the undesired behaviour? I'm not quite sure what you want to do.

[hushidong]

ok!

[moewew]

Thank you. I'm closing this for now.