Ampersand as namessep in biblatex label










9














I am trying to change the way that labels are generated. Some of it I already got working (only at maximum two authors, only last two digits of the year), but one thing does not seem to work, which is putting an ampersand between the authors if there are at least two.
In the manual on page 205 it is explained, that one can use special characters without escaping them as literals or padding, but what about the namessep field?



In the MWE I used 'X' in the place where an '&' should be placed, but I do not know how to do it.
I suspect, that since it is converted into the .bcf file, which is XML, that the ampersand makes troubles there, so is this a bug?



Here is a MWE:



documentclassarticle
usepackage[utf8]inputenc
usepackage[english]babel
usepackagecsquotes
usepackagefilecontents

beginfilecontents*references.bib
@articleeinstein,
author = "Albert Einstein and Second Author",
title = "Zur Elektrodynamik bewegter K"orper. (German)
[On the electrodynamics of moving bodies]",
journal = "Annalen der Physik",
volume = "322",
number = "10",
pages = "891--921",
year = "1905",
DOI = "http://dx.doi.org/10.1002/andp.19053221004",
keywords = "physics"


@bookdirac,
title=The Principles of Quantum Mechanics,
author=Paul Adrien Maurice Dirac,
isbn=9780198520115,
series=International series of monographs on physics,
year=1981,
publisher=Clarendon Press,
keywords = physics


@booklatexcompanion,
author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
title = "The LaTeX Companion",
year = "1993",
publisher = "Addison-Wesley",
address = "Reading, Massachusetts",
keywords = "latex"

endfilecontents*

usepackage[
backend=biber,
style=alphabetic,
citestyle=alphabetic,
maxcitenames=2,
mincitenames=2,
giveninits=true,
isbn=false,
]biblatex

renewcommand*labelalphaothers$^+$

DeclareLabelalphaTemplate
labelelement
field[final]shorthand
fieldlabel
field[names=2, namessep=addspaceXaddspace]labelname

labelelement
literaladdspace

labelelement
field[strside=right,strwidth=2]year



addbibresourcereferences.bib

begindocument
sectionFirst section

Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

medskip

printbibliography
enddocument


Render of MWE:
Render of MWE










share|improve this question




























    9














    I am trying to change the way that labels are generated. Some of it I already got working (only at maximum two authors, only last two digits of the year), but one thing does not seem to work, which is putting an ampersand between the authors if there are at least two.
    In the manual on page 205 it is explained, that one can use special characters without escaping them as literals or padding, but what about the namessep field?



    In the MWE I used 'X' in the place where an '&' should be placed, but I do not know how to do it.
    I suspect, that since it is converted into the .bcf file, which is XML, that the ampersand makes troubles there, so is this a bug?



    Here is a MWE:



    documentclassarticle
    usepackage[utf8]inputenc
    usepackage[english]babel
    usepackagecsquotes
    usepackagefilecontents

    beginfilecontents*references.bib
    @articleeinstein,
    author = "Albert Einstein and Second Author",
    title = "Zur Elektrodynamik bewegter K"orper. (German)
    [On the electrodynamics of moving bodies]",
    journal = "Annalen der Physik",
    volume = "322",
    number = "10",
    pages = "891--921",
    year = "1905",
    DOI = "http://dx.doi.org/10.1002/andp.19053221004",
    keywords = "physics"


    @bookdirac,
    title=The Principles of Quantum Mechanics,
    author=Paul Adrien Maurice Dirac,
    isbn=9780198520115,
    series=International series of monographs on physics,
    year=1981,
    publisher=Clarendon Press,
    keywords = physics


    @booklatexcompanion,
    author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
    title = "The LaTeX Companion",
    year = "1993",
    publisher = "Addison-Wesley",
    address = "Reading, Massachusetts",
    keywords = "latex"

    endfilecontents*

    usepackage[
    backend=biber,
    style=alphabetic,
    citestyle=alphabetic,
    maxcitenames=2,
    mincitenames=2,
    giveninits=true,
    isbn=false,
    ]biblatex

    renewcommand*labelalphaothers$^+$

    DeclareLabelalphaTemplate
    labelelement
    field[final]shorthand
    fieldlabel
    field[names=2, namessep=addspaceXaddspace]labelname

    labelelement
    literaladdspace

    labelelement
    field[strside=right,strwidth=2]year



    addbibresourcereferences.bib

    begindocument
    sectionFirst section

    Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

    medskip

    printbibliography
    enddocument


    Render of MWE:
    Render of MWE










    share|improve this question


























      9












      9








      9







      I am trying to change the way that labels are generated. Some of it I already got working (only at maximum two authors, only last two digits of the year), but one thing does not seem to work, which is putting an ampersand between the authors if there are at least two.
      In the manual on page 205 it is explained, that one can use special characters without escaping them as literals or padding, but what about the namessep field?



      In the MWE I used 'X' in the place where an '&' should be placed, but I do not know how to do it.
      I suspect, that since it is converted into the .bcf file, which is XML, that the ampersand makes troubles there, so is this a bug?



      Here is a MWE:



      documentclassarticle
      usepackage[utf8]inputenc
      usepackage[english]babel
      usepackagecsquotes
      usepackagefilecontents

      beginfilecontents*references.bib
      @articleeinstein,
      author = "Albert Einstein and Second Author",
      title = "Zur Elektrodynamik bewegter K"orper. (German)
      [On the electrodynamics of moving bodies]",
      journal = "Annalen der Physik",
      volume = "322",
      number = "10",
      pages = "891--921",
      year = "1905",
      DOI = "http://dx.doi.org/10.1002/andp.19053221004",
      keywords = "physics"


      @bookdirac,
      title=The Principles of Quantum Mechanics,
      author=Paul Adrien Maurice Dirac,
      isbn=9780198520115,
      series=International series of monographs on physics,
      year=1981,
      publisher=Clarendon Press,
      keywords = physics


      @booklatexcompanion,
      author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
      title = "The LaTeX Companion",
      year = "1993",
      publisher = "Addison-Wesley",
      address = "Reading, Massachusetts",
      keywords = "latex"

      endfilecontents*

      usepackage[
      backend=biber,
      style=alphabetic,
      citestyle=alphabetic,
      maxcitenames=2,
      mincitenames=2,
      giveninits=true,
      isbn=false,
      ]biblatex

      renewcommand*labelalphaothers$^+$

      DeclareLabelalphaTemplate
      labelelement
      field[final]shorthand
      fieldlabel
      field[names=2, namessep=addspaceXaddspace]labelname

      labelelement
      literaladdspace

      labelelement
      field[strside=right,strwidth=2]year



      addbibresourcereferences.bib

      begindocument
      sectionFirst section

      Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

      medskip

      printbibliography
      enddocument


      Render of MWE:
      Render of MWE










      share|improve this question















      I am trying to change the way that labels are generated. Some of it I already got working (only at maximum two authors, only last two digits of the year), but one thing does not seem to work, which is putting an ampersand between the authors if there are at least two.
      In the manual on page 205 it is explained, that one can use special characters without escaping them as literals or padding, but what about the namessep field?



      In the MWE I used 'X' in the place where an '&' should be placed, but I do not know how to do it.
      I suspect, that since it is converted into the .bcf file, which is XML, that the ampersand makes troubles there, so is this a bug?



      Here is a MWE:



      documentclassarticle
      usepackage[utf8]inputenc
      usepackage[english]babel
      usepackagecsquotes
      usepackagefilecontents

      beginfilecontents*references.bib
      @articleeinstein,
      author = "Albert Einstein and Second Author",
      title = "Zur Elektrodynamik bewegter K"orper. (German)
      [On the electrodynamics of moving bodies]",
      journal = "Annalen der Physik",
      volume = "322",
      number = "10",
      pages = "891--921",
      year = "1905",
      DOI = "http://dx.doi.org/10.1002/andp.19053221004",
      keywords = "physics"


      @bookdirac,
      title=The Principles of Quantum Mechanics,
      author=Paul Adrien Maurice Dirac,
      isbn=9780198520115,
      series=International series of monographs on physics,
      year=1981,
      publisher=Clarendon Press,
      keywords = physics


      @booklatexcompanion,
      author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
      title = "The LaTeX Companion",
      year = "1993",
      publisher = "Addison-Wesley",
      address = "Reading, Massachusetts",
      keywords = "latex"

      endfilecontents*

      usepackage[
      backend=biber,
      style=alphabetic,
      citestyle=alphabetic,
      maxcitenames=2,
      mincitenames=2,
      giveninits=true,
      isbn=false,
      ]biblatex

      renewcommand*labelalphaothers$^+$

      DeclareLabelalphaTemplate
      labelelement
      field[final]shorthand
      fieldlabel
      field[names=2, namessep=addspaceXaddspace]labelname

      labelelement
      literaladdspace

      labelelement
      field[strside=right,strwidth=2]year



      addbibresourcereferences.bib

      begindocument
      sectionFirst section

      Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

      medskip

      printbibliography
      enddocument


      Render of MWE:
      Render of MWE







      biblatex biber






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 10 at 20:04

























      asked Nov 10 at 18:53









      H. Rosendahl

      936




      936




















          2 Answers
          2






          active

          oldest

          votes


















          6














          Hide the ampersand in a command (& is not good enough because the command name contains an ampersand, which still throws the XML off) and use detokenize to make sure the macro does not get expanded when it is written to the .bcf.



          detokenize can often be a cheap work-around if biblatex options that may contain printable data explode. Often that happens because the value of the option needs to be written to the .bcf file, so Biber can consume its value. LaTeX usually performs full expansion when text is written to a file, so things may go wrong if the desired value is not expandable or (as in this case) expands to problematic text. detokenize stops this unwanted expansion. When the value is then picked up from the .bbl file, the tokens will be interpreted as usual and the output will be as expected.



          The quoted passage on page 205 of the manual only applies to padchar and literal, the value of namessep needs escaping for special characters in both LaTeX and XML.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=alphabetic,maxcitenames=2,mincitenames=2,giveninits=true,isbn=false,]biblatex

          renewcommand*labelalphaotherstextsuperscript+
          newcommand*ampersand&

          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=detokenizeaddspaceampersandspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcebiblatex-examples.bib

          begindocument
          citecompanion,sigfridsson,worman

          printbibliography
          enddocument


          Goossens & Mittelbach + 94; Sigfridsson & Ryde 98; Worman 02




          I'm not a big fan of abusing alphabetic to obtain what is essentially a full-blown author-year style with square brackets and the labels in the bibliography, but because it is a bit tricky to get only the last two digits of the year and retain uniqueness features I can't offer a simple implementation of the exact same style with style=authoryear, but



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=ext-authoryear,
          introcite=label,
          autocite=inline,
          maxcitenames=2,mincitenames=1,giveninits=true,uniquename=init,
          isbn=false]biblatex

          DeclareOuterCiteDelimsparencitebibopenbracketbibclosebracket

          DeclareFieldFormatbbx@introcitemkbibbrackets#1


          DeclareDelimFormatfinalnamedelimaddspace&space
          DeclareDelimFormat[bib]finalnamedelim%
          ifnumgreatervalueliststop2finalandcomma%
          addspacebibstringandspace

          addbibresourcebiblatex-examples.bib

          begindocument
          autocitecompanion,sigfridsson,worman

          printbibliography
          enddocument


          could be a start.



          The bibliography shows the citation labels, the space allocated for the labels is fixed, longer labels produce a line break to let the bibliography entry start on the next line



          The 'two-column' layout of the alphabetic style that automatically allocates enough space for each label to not run into the entry data may seem preferable, but if you cite a work by Helena Bonham Carter and Ralph Vaughn Williams, you will soon notice that the space left for the actual entry data becomes painfully narrow and does not allow for good line breaks any more.






          share|improve this answer






















          • Thanks! This explains nicely why it fails and what to do to correct it.
            – H. Rosendahl
            Nov 11 at 7:38


















          3














          newcommand*ambr& didn't work for me. newrobustcmdambr& worked.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes
          usepackagefilecontents
          usepackage[
          backend=biber,
          style=alphabetic,
          citestyle=alphabetic,
          maxcitenames=2,
          mincitenames=2,
          giveninits=true,
          isbn=false,
          ]biblatex

          beginfilecontents*references.bib
          @articleeinstein,
          author = "Albert Einstein and Second Author",
          title = "Zur Elektrodynamik bewegter K"orper. (German)
          [On the electrodynamics of moving bodies]",
          journal = "Annalen der Physik",
          volume = "322",
          number = "10",
          pages = "891--921",
          year = "1905",
          DOI = "http://dx.doi.org/10.1002/andp.19053221004",
          keywords = "physics"


          @bookdirac,
          title=The Principles of Quantum Mechanics,
          author=Paul Adrien Maurice Dirac,
          isbn=9780198520115,
          series=International series of monographs on physics,
          year=1981,
          publisher=Clarendon Press,
          keywords = physics


          @booklatexcompanion,
          author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
          title = "The LaTeX Companion",
          year = "1993",
          publisher = "Addison-Wesley",
          address = "Reading, Massachusetts",
          keywords = "latex"

          endfilecontents*



          renewcommand*labelalphaothers$^+$
          %newcommand*ambr&
          newrobustcmdambr&
          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=addspaceambraddspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcereferences.bib

          begindocument
          sectionFirst section

          Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

          medskip

          printbibliography
          enddocument


          enter image description here






          share|improve this answer
















          • 1




            That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
            – moewe
            Nov 10 at 22:29










          Your Answer








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          2 Answers
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          2 Answers
          2






          active

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          active

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          active

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          6














          Hide the ampersand in a command (& is not good enough because the command name contains an ampersand, which still throws the XML off) and use detokenize to make sure the macro does not get expanded when it is written to the .bcf.



          detokenize can often be a cheap work-around if biblatex options that may contain printable data explode. Often that happens because the value of the option needs to be written to the .bcf file, so Biber can consume its value. LaTeX usually performs full expansion when text is written to a file, so things may go wrong if the desired value is not expandable or (as in this case) expands to problematic text. detokenize stops this unwanted expansion. When the value is then picked up from the .bbl file, the tokens will be interpreted as usual and the output will be as expected.



          The quoted passage on page 205 of the manual only applies to padchar and literal, the value of namessep needs escaping for special characters in both LaTeX and XML.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=alphabetic,maxcitenames=2,mincitenames=2,giveninits=true,isbn=false,]biblatex

          renewcommand*labelalphaotherstextsuperscript+
          newcommand*ampersand&

          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=detokenizeaddspaceampersandspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcebiblatex-examples.bib

          begindocument
          citecompanion,sigfridsson,worman

          printbibliography
          enddocument


          Goossens & Mittelbach + 94; Sigfridsson & Ryde 98; Worman 02




          I'm not a big fan of abusing alphabetic to obtain what is essentially a full-blown author-year style with square brackets and the labels in the bibliography, but because it is a bit tricky to get only the last two digits of the year and retain uniqueness features I can't offer a simple implementation of the exact same style with style=authoryear, but



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=ext-authoryear,
          introcite=label,
          autocite=inline,
          maxcitenames=2,mincitenames=1,giveninits=true,uniquename=init,
          isbn=false]biblatex

          DeclareOuterCiteDelimsparencitebibopenbracketbibclosebracket

          DeclareFieldFormatbbx@introcitemkbibbrackets#1


          DeclareDelimFormatfinalnamedelimaddspace&space
          DeclareDelimFormat[bib]finalnamedelim%
          ifnumgreatervalueliststop2finalandcomma%
          addspacebibstringandspace

          addbibresourcebiblatex-examples.bib

          begindocument
          autocitecompanion,sigfridsson,worman

          printbibliography
          enddocument


          could be a start.



          The bibliography shows the citation labels, the space allocated for the labels is fixed, longer labels produce a line break to let the bibliography entry start on the next line



          The 'two-column' layout of the alphabetic style that automatically allocates enough space for each label to not run into the entry data may seem preferable, but if you cite a work by Helena Bonham Carter and Ralph Vaughn Williams, you will soon notice that the space left for the actual entry data becomes painfully narrow and does not allow for good line breaks any more.






          share|improve this answer






















          • Thanks! This explains nicely why it fails and what to do to correct it.
            – H. Rosendahl
            Nov 11 at 7:38















          6














          Hide the ampersand in a command (& is not good enough because the command name contains an ampersand, which still throws the XML off) and use detokenize to make sure the macro does not get expanded when it is written to the .bcf.



          detokenize can often be a cheap work-around if biblatex options that may contain printable data explode. Often that happens because the value of the option needs to be written to the .bcf file, so Biber can consume its value. LaTeX usually performs full expansion when text is written to a file, so things may go wrong if the desired value is not expandable or (as in this case) expands to problematic text. detokenize stops this unwanted expansion. When the value is then picked up from the .bbl file, the tokens will be interpreted as usual and the output will be as expected.



          The quoted passage on page 205 of the manual only applies to padchar and literal, the value of namessep needs escaping for special characters in both LaTeX and XML.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=alphabetic,maxcitenames=2,mincitenames=2,giveninits=true,isbn=false,]biblatex

          renewcommand*labelalphaotherstextsuperscript+
          newcommand*ampersand&

          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=detokenizeaddspaceampersandspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcebiblatex-examples.bib

          begindocument
          citecompanion,sigfridsson,worman

          printbibliography
          enddocument


          Goossens & Mittelbach + 94; Sigfridsson & Ryde 98; Worman 02




          I'm not a big fan of abusing alphabetic to obtain what is essentially a full-blown author-year style with square brackets and the labels in the bibliography, but because it is a bit tricky to get only the last two digits of the year and retain uniqueness features I can't offer a simple implementation of the exact same style with style=authoryear, but



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=ext-authoryear,
          introcite=label,
          autocite=inline,
          maxcitenames=2,mincitenames=1,giveninits=true,uniquename=init,
          isbn=false]biblatex

          DeclareOuterCiteDelimsparencitebibopenbracketbibclosebracket

          DeclareFieldFormatbbx@introcitemkbibbrackets#1


          DeclareDelimFormatfinalnamedelimaddspace&space
          DeclareDelimFormat[bib]finalnamedelim%
          ifnumgreatervalueliststop2finalandcomma%
          addspacebibstringandspace

          addbibresourcebiblatex-examples.bib

          begindocument
          autocitecompanion,sigfridsson,worman

          printbibliography
          enddocument


          could be a start.



          The bibliography shows the citation labels, the space allocated for the labels is fixed, longer labels produce a line break to let the bibliography entry start on the next line



          The 'two-column' layout of the alphabetic style that automatically allocates enough space for each label to not run into the entry data may seem preferable, but if you cite a work by Helena Bonham Carter and Ralph Vaughn Williams, you will soon notice that the space left for the actual entry data becomes painfully narrow and does not allow for good line breaks any more.






          share|improve this answer






















          • Thanks! This explains nicely why it fails and what to do to correct it.
            – H. Rosendahl
            Nov 11 at 7:38













          6












          6








          6






          Hide the ampersand in a command (& is not good enough because the command name contains an ampersand, which still throws the XML off) and use detokenize to make sure the macro does not get expanded when it is written to the .bcf.



          detokenize can often be a cheap work-around if biblatex options that may contain printable data explode. Often that happens because the value of the option needs to be written to the .bcf file, so Biber can consume its value. LaTeX usually performs full expansion when text is written to a file, so things may go wrong if the desired value is not expandable or (as in this case) expands to problematic text. detokenize stops this unwanted expansion. When the value is then picked up from the .bbl file, the tokens will be interpreted as usual and the output will be as expected.



          The quoted passage on page 205 of the manual only applies to padchar and literal, the value of namessep needs escaping for special characters in both LaTeX and XML.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=alphabetic,maxcitenames=2,mincitenames=2,giveninits=true,isbn=false,]biblatex

          renewcommand*labelalphaotherstextsuperscript+
          newcommand*ampersand&

          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=detokenizeaddspaceampersandspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcebiblatex-examples.bib

          begindocument
          citecompanion,sigfridsson,worman

          printbibliography
          enddocument


          Goossens & Mittelbach + 94; Sigfridsson & Ryde 98; Worman 02




          I'm not a big fan of abusing alphabetic to obtain what is essentially a full-blown author-year style with square brackets and the labels in the bibliography, but because it is a bit tricky to get only the last two digits of the year and retain uniqueness features I can't offer a simple implementation of the exact same style with style=authoryear, but



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=ext-authoryear,
          introcite=label,
          autocite=inline,
          maxcitenames=2,mincitenames=1,giveninits=true,uniquename=init,
          isbn=false]biblatex

          DeclareOuterCiteDelimsparencitebibopenbracketbibclosebracket

          DeclareFieldFormatbbx@introcitemkbibbrackets#1


          DeclareDelimFormatfinalnamedelimaddspace&space
          DeclareDelimFormat[bib]finalnamedelim%
          ifnumgreatervalueliststop2finalandcomma%
          addspacebibstringandspace

          addbibresourcebiblatex-examples.bib

          begindocument
          autocitecompanion,sigfridsson,worman

          printbibliography
          enddocument


          could be a start.



          The bibliography shows the citation labels, the space allocated for the labels is fixed, longer labels produce a line break to let the bibliography entry start on the next line



          The 'two-column' layout of the alphabetic style that automatically allocates enough space for each label to not run into the entry data may seem preferable, but if you cite a work by Helena Bonham Carter and Ralph Vaughn Williams, you will soon notice that the space left for the actual entry data becomes painfully narrow and does not allow for good line breaks any more.






          share|improve this answer














          Hide the ampersand in a command (& is not good enough because the command name contains an ampersand, which still throws the XML off) and use detokenize to make sure the macro does not get expanded when it is written to the .bcf.



          detokenize can often be a cheap work-around if biblatex options that may contain printable data explode. Often that happens because the value of the option needs to be written to the .bcf file, so Biber can consume its value. LaTeX usually performs full expansion when text is written to a file, so things may go wrong if the desired value is not expandable or (as in this case) expands to problematic text. detokenize stops this unwanted expansion. When the value is then picked up from the .bbl file, the tokens will be interpreted as usual and the output will be as expected.



          The quoted passage on page 205 of the manual only applies to padchar and literal, the value of namessep needs escaping for special characters in both LaTeX and XML.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=alphabetic,maxcitenames=2,mincitenames=2,giveninits=true,isbn=false,]biblatex

          renewcommand*labelalphaotherstextsuperscript+
          newcommand*ampersand&

          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=detokenizeaddspaceampersandspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcebiblatex-examples.bib

          begindocument
          citecompanion,sigfridsson,worman

          printbibliography
          enddocument


          Goossens & Mittelbach + 94; Sigfridsson & Ryde 98; Worman 02




          I'm not a big fan of abusing alphabetic to obtain what is essentially a full-blown author-year style with square brackets and the labels in the bibliography, but because it is a bit tricky to get only the last two digits of the year and retain uniqueness features I can't offer a simple implementation of the exact same style with style=authoryear, but



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes

          usepackage[backend=biber,style=ext-authoryear,
          introcite=label,
          autocite=inline,
          maxcitenames=2,mincitenames=1,giveninits=true,uniquename=init,
          isbn=false]biblatex

          DeclareOuterCiteDelimsparencitebibopenbracketbibclosebracket

          DeclareFieldFormatbbx@introcitemkbibbrackets#1


          DeclareDelimFormatfinalnamedelimaddspace&space
          DeclareDelimFormat[bib]finalnamedelim%
          ifnumgreatervalueliststop2finalandcomma%
          addspacebibstringandspace

          addbibresourcebiblatex-examples.bib

          begindocument
          autocitecompanion,sigfridsson,worman

          printbibliography
          enddocument


          could be a start.



          The bibliography shows the citation labels, the space allocated for the labels is fixed, longer labels produce a line break to let the bibliography entry start on the next line



          The 'two-column' layout of the alphabetic style that automatically allocates enough space for each label to not run into the entry data may seem preferable, but if you cite a work by Helena Bonham Carter and Ralph Vaughn Williams, you will soon notice that the space left for the actual entry data becomes painfully narrow and does not allow for good line breaks any more.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 11 at 11:16

























          answered Nov 10 at 21:37









          moewe

          86.1k9109332




          86.1k9109332











          • Thanks! This explains nicely why it fails and what to do to correct it.
            – H. Rosendahl
            Nov 11 at 7:38
















          • Thanks! This explains nicely why it fails and what to do to correct it.
            – H. Rosendahl
            Nov 11 at 7:38















          Thanks! This explains nicely why it fails and what to do to correct it.
          – H. Rosendahl
          Nov 11 at 7:38




          Thanks! This explains nicely why it fails and what to do to correct it.
          – H. Rosendahl
          Nov 11 at 7:38











          3














          newcommand*ambr& didn't work for me. newrobustcmdambr& worked.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes
          usepackagefilecontents
          usepackage[
          backend=biber,
          style=alphabetic,
          citestyle=alphabetic,
          maxcitenames=2,
          mincitenames=2,
          giveninits=true,
          isbn=false,
          ]biblatex

          beginfilecontents*references.bib
          @articleeinstein,
          author = "Albert Einstein and Second Author",
          title = "Zur Elektrodynamik bewegter K"orper. (German)
          [On the electrodynamics of moving bodies]",
          journal = "Annalen der Physik",
          volume = "322",
          number = "10",
          pages = "891--921",
          year = "1905",
          DOI = "http://dx.doi.org/10.1002/andp.19053221004",
          keywords = "physics"


          @bookdirac,
          title=The Principles of Quantum Mechanics,
          author=Paul Adrien Maurice Dirac,
          isbn=9780198520115,
          series=International series of monographs on physics,
          year=1981,
          publisher=Clarendon Press,
          keywords = physics


          @booklatexcompanion,
          author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
          title = "The LaTeX Companion",
          year = "1993",
          publisher = "Addison-Wesley",
          address = "Reading, Massachusetts",
          keywords = "latex"

          endfilecontents*



          renewcommand*labelalphaothers$^+$
          %newcommand*ambr&
          newrobustcmdambr&
          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=addspaceambraddspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcereferences.bib

          begindocument
          sectionFirst section

          Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

          medskip

          printbibliography
          enddocument


          enter image description here






          share|improve this answer
















          • 1




            That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
            – moewe
            Nov 10 at 22:29















          3














          newcommand*ambr& didn't work for me. newrobustcmdambr& worked.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes
          usepackagefilecontents
          usepackage[
          backend=biber,
          style=alphabetic,
          citestyle=alphabetic,
          maxcitenames=2,
          mincitenames=2,
          giveninits=true,
          isbn=false,
          ]biblatex

          beginfilecontents*references.bib
          @articleeinstein,
          author = "Albert Einstein and Second Author",
          title = "Zur Elektrodynamik bewegter K"orper. (German)
          [On the electrodynamics of moving bodies]",
          journal = "Annalen der Physik",
          volume = "322",
          number = "10",
          pages = "891--921",
          year = "1905",
          DOI = "http://dx.doi.org/10.1002/andp.19053221004",
          keywords = "physics"


          @bookdirac,
          title=The Principles of Quantum Mechanics,
          author=Paul Adrien Maurice Dirac,
          isbn=9780198520115,
          series=International series of monographs on physics,
          year=1981,
          publisher=Clarendon Press,
          keywords = physics


          @booklatexcompanion,
          author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
          title = "The LaTeX Companion",
          year = "1993",
          publisher = "Addison-Wesley",
          address = "Reading, Massachusetts",
          keywords = "latex"

          endfilecontents*



          renewcommand*labelalphaothers$^+$
          %newcommand*ambr&
          newrobustcmdambr&
          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=addspaceambraddspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcereferences.bib

          begindocument
          sectionFirst section

          Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

          medskip

          printbibliography
          enddocument


          enter image description here






          share|improve this answer
















          • 1




            That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
            – moewe
            Nov 10 at 22:29













          3












          3








          3






          newcommand*ambr& didn't work for me. newrobustcmdambr& worked.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes
          usepackagefilecontents
          usepackage[
          backend=biber,
          style=alphabetic,
          citestyle=alphabetic,
          maxcitenames=2,
          mincitenames=2,
          giveninits=true,
          isbn=false,
          ]biblatex

          beginfilecontents*references.bib
          @articleeinstein,
          author = "Albert Einstein and Second Author",
          title = "Zur Elektrodynamik bewegter K"orper. (German)
          [On the electrodynamics of moving bodies]",
          journal = "Annalen der Physik",
          volume = "322",
          number = "10",
          pages = "891--921",
          year = "1905",
          DOI = "http://dx.doi.org/10.1002/andp.19053221004",
          keywords = "physics"


          @bookdirac,
          title=The Principles of Quantum Mechanics,
          author=Paul Adrien Maurice Dirac,
          isbn=9780198520115,
          series=International series of monographs on physics,
          year=1981,
          publisher=Clarendon Press,
          keywords = physics


          @booklatexcompanion,
          author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
          title = "The LaTeX Companion",
          year = "1993",
          publisher = "Addison-Wesley",
          address = "Reading, Massachusetts",
          keywords = "latex"

          endfilecontents*



          renewcommand*labelalphaothers$^+$
          %newcommand*ambr&
          newrobustcmdambr&
          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=addspaceambraddspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcereferences.bib

          begindocument
          sectionFirst section

          Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

          medskip

          printbibliography
          enddocument


          enter image description here






          share|improve this answer












          newcommand*ambr& didn't work for me. newrobustcmdambr& worked.



          documentclassarticle
          usepackage[utf8]inputenc
          usepackage[english]babel
          usepackagecsquotes
          usepackagefilecontents
          usepackage[
          backend=biber,
          style=alphabetic,
          citestyle=alphabetic,
          maxcitenames=2,
          mincitenames=2,
          giveninits=true,
          isbn=false,
          ]biblatex

          beginfilecontents*references.bib
          @articleeinstein,
          author = "Albert Einstein and Second Author",
          title = "Zur Elektrodynamik bewegter K"orper. (German)
          [On the electrodynamics of moving bodies]",
          journal = "Annalen der Physik",
          volume = "322",
          number = "10",
          pages = "891--921",
          year = "1905",
          DOI = "http://dx.doi.org/10.1002/andp.19053221004",
          keywords = "physics"


          @bookdirac,
          title=The Principles of Quantum Mechanics,
          author=Paul Adrien Maurice Dirac,
          isbn=9780198520115,
          series=International series of monographs on physics,
          year=1981,
          publisher=Clarendon Press,
          keywords = physics


          @booklatexcompanion,
          author = "Michel Goossens and Frank Mittelbach and Alexander Samarin",
          title = "The LaTeX Companion",
          year = "1993",
          publisher = "Addison-Wesley",
          address = "Reading, Massachusetts",
          keywords = "latex"

          endfilecontents*



          renewcommand*labelalphaothers$^+$
          %newcommand*ambr&
          newrobustcmdambr&
          DeclareLabelalphaTemplate
          labelelement
          field[final]shorthand
          fieldlabel
          field[names=2, namessep=addspaceambraddspace]labelname

          labelelement
          literaladdspace

          labelelement
          field[strside=right,strwidth=2]year



          addbibresourcereferences.bib

          begindocument
          sectionFirst section

          Items that are cited: textitThe LaTeX Companion book citelatexcompanion, The Einstein's journal paper citeeinstein and the Dirac's book citedirac are physics related items. Next, a citation about textitThe LaTeX Companion book citelatexcompanion.

          medskip

          printbibliography
          enddocument


          enter image description here







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 10 at 22:24









          nidhin

          3,342927




          3,342927







          • 1




            That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
            – moewe
            Nov 10 at 22:29












          • 1




            That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
            – moewe
            Nov 10 at 22:29







          1




          1




          That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
          – moewe
          Nov 10 at 22:29




          That's why I had the detokenize as well, you need to make sure that the ampersand does not expand when it is written to the .bcf. A robust command as you used it would be the other possibility.
          – moewe
          Nov 10 at 22:29

















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