Biber: las taquigrafías con macros \textbf{} se ordenan de forma diferente

Question

Si cambio una taquigrafía en el .bibarchivo desde XYZa \textbf{X}YZel orden en la bibliografía cambia.

¿Cómo puedo tener taquigrafías en las que algunas de las taquigrafías comienzan con a \textbf(para poner en negrita ciertas letras) sin distorsionar el orden de clasificación?

---

MWE

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage[backend=biber,
        style=alphabetic,
        natbib=true,
        sorting=ynt,
        ]{biblatex}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{xei2016asdf,
Author = {Xei, A and A, B and B, C and C, D},
Title = {asdf is asdf},
Year = {2016},
}
@article{xei2017bob,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bob is bob},
Year = {2017},
}
@article{xei2017bob2,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bob is bob 2},
Year = {2017},
shorthand = {\textbf{X}ei+17},
sortshorthand = {Xei+17},
}
@article{xei2017alice,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice},
Year = {2017},
}
@article{xei2018alice2,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice 2},
Year = {2018},
shorthand = {\textbf{X}AB18},
sortshorthand = {XAB18},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}

\newrefcontext[sorting=anyvt]
\cite{xei2016asdf,xei2017bob,xei2017bob2,xei2017alice,xei2018alice2}

\printbibliography
\end{document}

Resultados en la bibliografía:

Pero todavía me gustaría la siguiente clasificación:

---

Hay una curiosidad sobre la solución propuesta. Si se considera:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage[backend=biber,
        style=alphabetic,
        ]{biblatex}

\DeclareSortingScheme{anyt}{
  \sort{
    \field{presort}
  }
  \sort{
    \field{sortshorthand}
    \field{labelalpha}
  }
  \sort[final]{
    \field{sortkey}
  }
  \sort{
    \field{sortname}
    \field{author}
    \field{editor}
    \field{translator}
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{sortyear}
    \field{year}
  }
  \sort{
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{volume}
    \literal{0}
  }
}

\DeclareSortingScheme{anyvt}{
  \sort{
    \field{presort}
  }
  \sort{
    \field{sortshorthand}
    \field{labelalpha}
  }
  \sort[final]{
    \field{sortkey}
  }
  \sort{
    \field{sortname}
    \field{author}
    \field{editor}
    \field{translator}
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{sortyear}
    \field{year}
  }
  \sort{
    \field{volume}
    \literal{0}
  }
  \sort{
    \field{sorttitle}
    \field{title}
  }
}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{xei2016asdf,
Author = {Xei, A and A, B and B, C and C, D},
Title = {asdf is asdf},
Year = {2016},
}
@article{xei2018bob,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bob is bob},
Year = {2018},
}
@article{xei2017bob2,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bbob is bob 2},
Year = {2017},
shorthand = {\textbf{X}ei+17},
sortshorthand = {Xei+17},
}
@article{xei2017alice,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice},
Year = {2017},
}
@article{xei2018alice2,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice 2},
Year = {2018},
shorthand = {\textbf{X}AB18},
sortshorthand = {XAB18},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}
\cite{xei2016asdf,xei2018bob,xei2017bob2,xei2017alice,xei2018alice2}

\printbibliography
\end{document}

obtenemos

versus el pedido sin taquigrafías

Answer 1

biblatexconoce el campo sortshorthand. Elbiblatexdocumentaciónexplica (§2.2.3Campos especiales, pag. 30):

[ sortshorthand] Similar a sortkeypero usado en la lista de taquigrafías. Si está presente, biblatexutiliza este campo en lugar de shorthandal ordenar la lista de taquigrafías. Esto es útil si el campo abreviado contiene abreviaturas con comandos de formato como \empho \textbf.

Para los alphabeticesquemas de clasificación anyty anyvt biblatexno se utiliza sortshorthand(ya que eso básicamente significaría realizar un seguimiento de a labelalphay a sortlabelalphaque se construirían de acuerdo con las mismas reglas, pero da prioridad a sort...los campos).

Con la configuración estándar (que se establece labelalphaen shorthandsi esta última existe), basta con agregar \field{sortshorthand}antes \field{labelalpha}en los esquemas de clasificación.

El MWE redefine ambos esquemas de clasificación, pero si solo usa uno de los dos, puede eliminar el otro.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage[backend=biber,
        style=alphabetic,
        ]{biblatex}

\DeclareSortingTemplate{anyt}{
  \sort{
    \field{presort}
  }
  \sort{
    \field{sortshorthand}
    \field{labelalpha}
  }
  \sort[final]{
    \field{sortkey}
  }
  \sort{
    \field{sortname}
    \field{author}
    \field{editor}
    \field{translator}
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{sortyear}
    \field{year}
  }
  \sort{
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{volume}
    \literal{0}
  }
}

\DeclareSortingTemplate{anyvt}{
  \sort{
    \field{presort}
  }
  \sort{
    \field{sortshorthand}
    \field{labelalpha}
  }
  \sort[final]{
    \field{sortkey}
  }
  \sort{
    \field{sortname}
    \field{author}
    \field{editor}
    \field{translator}
    \field{sorttitle}
    \field{title}
  }
  \sort{
    \field{sortyear}
    \field{year}
  }
  \sort{
    \field{volume}
    \literal{0}
  }
  \sort{
    \field{sorttitle}
    \field{title}
  }
}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{xei2016asdf,
Author = {Xei, A and A, B and B, C and C, D},
Title = {asdf is asdf},
Year = {2016},
}
@article{xei2017bob,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bob is bob},
Year = {2017},
}
@article{xei2017bob2,
Author = {Xei, A and A, B and B, C and C, D},
Title = {bob is bob 2},
Year = {2017},
shorthand = {\textbf{X}ei+17},
sortshorthand = {Xei+17},
}
@article{xei2017alice,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice},
Year = {2017},
}
@article{xei2018alice2,
Author = {Xei, A and A, B and B, C},
Title = {alice is alice 2},
Year = {2018},
shorthand = {\textbf{X}AB18},
sortshorthand = {XAB18},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}
\cite{xei2016asdf,xei2017bob,xei2017bob2,xei2017alice,xei2018alice2}

\printbibliography
\end{document}