A variant of \DeclareSortExclusion

[maieul]

DeclareSortExclusion allow to exclude some field from sorting for specific entry-type. Should it be possible to have a variant, which will exclude field from entry-type which are not passed as argument.

Here a MWE to understand my need.

\documentclass{book}
\usepackage{filecontents}
\usepackage[citereset=chapter,citestyle=verbose-trad2,bibstyle=verbose]{biblatex}
\begin{filecontents}{\jobname.bib}
@book{A,
  Author={A},
  Title={Toto},
  Maintitle={Ratp}
}

@book{A2,
  Author={A},
  Title={Sncf},
}

@bookinbook{A3,
  Author={A},
  Title={Sncf},
  Booktitle={Ratp},
  Maintitle={Chemin de fer}
}


\end{filecontents}
\bibliography{\jobname.bib}
\DeclareSortExclusion{bookinbook}{maintitle}
\DeclareSortingScheme{nty}{
  \sort{
    \field{presort}
  }
  \sort[final]{
    \field{sortkey}
  }
  \sort{
    \field{sortname}
    \field{author}
    \field{editor}
    \field{translator}
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{sorttitle}
    \field{maintitle}
    \field{title}
  }
  \sort{
    \field{sortyear}
    \field{year}
  }
  \sort{
    \field{volume}
    \literal{0}
  }
}

\begin{document}

\nocite{*}
\printbibliography


\end{document}

My changes on the nty field is required if I want to have a good position for the entry A. However, if I don't do add \DeclareSortExclusion{bookinbook}{maintitle}, there is a problem for the sorting of A3 entry. However, I think it will be better to tell to biber "take account of maintitle only for @book entries", than to tell it "take account of maintitle for all entries except these one`.

[maieul]

Ps: by the way, I think my variation of nty should be the default one.

[maieul]

For now, I am able to manage it with

\DeclareStyleSourcemap{%
    \maps[datatype=bibtex]{%
        \map[overwrite=false]{%
            \pertype{book}%
              \pertype{collection}%
              \pertype{proceedings}%
              \pertype{reference}%
              \step[fieldsource=maintitle]%
              \step[origfieldval,fieldset=sorttitle]%
            }%
    }%
}%

\DeclareDataInheritance{*}{book,collection,proceedings,reference}{
  \inherit[override=false]{title}{sorttitle}
}

But I am not sur that is the best way.

[plk]

Please try biblatex 3.7 and biber 2.7 from SF. You can do what you want with:

\DeclareSortExclusion{*}{maintitle}
\DeclareSortInclusion{bookinbook}{maintitle}

See the docs for \DeclareSortExclusion and \DeclareSortInclusion

[maieul]

many thanks. I will try this week-end, I hope.

Le 23 sept. 2016 � 11:39, plk notifications@github.com a �crit :

Please try biblatex 3.7 and biber 2.7 from SF. You can do what you want with:

\DeclareSortExclusion{*}{maintitle}
\DeclareSortInclusion{bookinbook}{maintitle}

See the docs for \DeclareSortExclusion and \DeclareSortInclusion

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[maieul]

I have tried with my example, and it's work.

\DeclareSortExclusion{*}{maintitle}
\DeclareSortInclusion{book}{maintitle}

Many thanks