[comp.text.tex] bibstyle: sorting for non-english names

spit@ruunsa.fys.ruu.nl (Werenfried Spit) (12/18/90)

Harmen van den Berg asked for a bibstyle that would
print names like van den Berg as `van den Berg' but
sort them as `Berg, van den' -- as is practice in 
dutch. The following style does this. To adapt it
to your personal needs you might want to change two
things:

 * there is a list of macros defining handy abbrevations
   for physics journals: you could change this to your
   own favourite journals

 * on a few places in the file are words like `en', 
   `hoofdstuk', `Deel', etc. If you use another 
   language than dutch change them into `and', 
   `chapter' etc or whatever you like.


Werenfried Spit                            
   R.J. v.d. Graafflaboratorium            +31-(0)30-53-2330                   
   Postbus 80.000                          
   3508 TA  Utrecht                        spit@fys.ruu.nl      
   The Netherlands                         spit@hutruu51.bitnet    


---------------------------------cut here--------------------------------------
 FUNCTION {hello}
{ "BibTeX bibliography style Nederlands " top$
  "version 0.99" top$
  "laatste wijziging 04-10-1990          (WS)    " top$
}
% (C) Werenfried Spit    04-10-90
%
%     R.J. v.d. Graafflaboratorium
%     Postbus 80000
%     3508 TA  Utrecht
%     nspit@fys.ruu.nl
%
%     Met gebruikmaking van veel werk van Piet v Oostrum en Oren Patashnik
%     for BibTeX 0.99a and LaTeX 2.09 %

%   Citation format: [author-last-name, year]
%             [author-last-name \& author-last-name, year]
%             [author-last-name {\em et~al.}, year]
%
%   Reference list ordering: alphabetical by author or whatever passes
%   for author in the absence of one.
%
% This BibTeX style has support for short (year only) citations.  This
% is done by having the citations actually look like
%         \citeauthoryear{author-info}{year}
% The LaTeX style has to have the following (or similar)
%     \let\@internalcite\cite
%     \def\cite{\def\citeauthoryear##1##2{##1, ##2}\@internalcite}
%     \def\shortcite{\def\citeauthoryear##1{##2}\@internalcite}
%     \def\@biblabel#1{\def\citeauthoryear##1##2{##1, ##2}[#1]\hfill}
% which makes \shortcite the macro for short citations.

ENTRY
  { address
    author
    booktitle
    chapter
    edition
    editor
    howpublished
    institution
    journal
    key
    month
    note
    number
    organization
    pages
    publisher
    school
    series
    title
    type
    volume
    year
  }
  {}
  { label extra.label sort.label }

INTEGERS { output.state before.all mid.sentence after.sentence after.block }

FUNCTION {init.state.consts}
{ #0 'before.all :=
  #1 'mid.sentence :=
  #2 'after.sentence :=
  #3 'after.block :=
}

STRINGS { s t }

FUNCTION {output.nonnull}
{ 's :=
  output.state mid.sentence =
    { ", " * write$ }
    { output.state after.block =
    { add.period$ write$
      newline$
      "\newblock " write$
    }
    { output.state before.all =
        'write$
        { add.period$ " " * write$ }
      if$
    }
      if$
      mid.sentence 'output.state :=
    }
  if$
  s
}

FUNCTION {output}
{ duplicate$ empty$
    'pop$
    'output.nonnull
  if$
}

FUNCTION {output.check}
{ 't :=
  duplicate$ empty$
    { pop$ "empty " t * " in " * cite$ * warning$ }
    'output.nonnull
  if$
}

FUNCTION {output.bibitem}
{ newline$

  "\bibitem[" write$
  label write$
  "]{" write$

  cite$ write$
  "}" write$
  newline$
  ""
  before.all 'output.state :=
}

FUNCTION {fin.entry}
{ add.period$
  write$
  newline$
}

FUNCTION {new.block}
{ output.state before.all =
    'skip$
    { after.block 'output.state := }
  if$
}

FUNCTION {new.sentence}
{ output.state after.block =
    'skip$
    { output.state before.all =
    'skip$
    { after.sentence 'output.state := }
      if$
    }
  if$
}

FUNCTION {not}
{   { #0 }
    { #1 }
  if$
}

FUNCTION {and}
{   'skip$
    { pop$ #0 }
  if$
}

FUNCTION {or}
{   { pop$ #1 }
    'skip$
  if$
}

FUNCTION {new.block.checka}
{ empty$
    'skip$
    'new.block
  if$
}

FUNCTION {new.block.checkb}
{ empty$
  swap$ empty$
  and
    'skip$
    'new.block
  if$
}

FUNCTION {new.sentence.checka}
{ empty$
    'skip$
    'new.sentence
  if$
}

FUNCTION {new.sentence.checkb}
{ empty$
  swap$ empty$
  and
    'skip$
    'new.sentence
  if$
}

FUNCTION {field.or.null}
{ duplicate$ empty$
    { pop$ "" }
    'skip$
  if$
}

FUNCTION {emphasize}
{ duplicate$ empty$
    { pop$ "" }
    { "{\em " swap$ * "}" * }
  if$
}

INTEGERS { nameptr namesleft numnames }

FUNCTION {format.names}
{ 's :=
  #1 'nameptr :=
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }

    { s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ 't :=

      nameptr #1 >                  % in de referentie wordt de volledige naam
    { namesleft #1 >                % afgedrukt: "J.H. van Dale"  (WS)
        { ", " * t * }
        { numnames #2 >
         { "," * }
         'skip$
          if$
          t "others" =
         { " {\em ~et~al.}" * }
         { " en " * t * }           % hier wordt een tussenvoegsel
          if$                       % tussen auteursnamen gemaakt   (WS)
        }
      if$
    }
    't
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

FUNCTION {format.authors}
{ author empty$
    { "" }
    { author format.names }
  if$
}

FUNCTION {format.editors}
{ editor empty$
    { "" }
    { editor format.names
      editor num.names$ #1 >
    { ", editors" * }
    { ", editor" * }
      if$
    }
  if$
}

FUNCTION {format.title}
{ title empty$
    { "" }

    { title "t" change.case$ }

  if$
}

FUNCTION {n.dashify}
{ 't :=
  ""
    { t empty$ not }
    { t #1 #1 substring$ "-" =
    { t #1 #2 substring$ "--" = not
        { "--" *
          t #2 global.max$ substring$ 't :=
        }
        {   { t #1 #1 substring$ "-" = }
         { "-" *
           t #2 global.max$ substring$ 't :=
         }
          while$
        }
      if$
    }
    { t #1 #1 substring$ *
      t #2 global.max$ substring$ 't :=
    }
      if$
    }
  while$
}

FUNCTION {format.date}
{ year empty$
    { month empty$
    { "" }
    { "there's a month but no year in " cite$ * warning$
      month
    }
      if$
    }
    { month empty$
    'year
    { month " " * year * }
      if$
    }
  if$
}

FUNCTION {format.btitle}
{ title emphasize
}

FUNCTION {tie.or.space.connect}
{ duplicate$ text.length$ #3 <
    { "~" }
    { " " }
  if$
  swap$ * *
}

FUNCTION {either.or.check}
{ empty$
    'pop$
    { "can't use both " swap$ * " fields in " * cite$ * warning$ }
  if$
}

FUNCTION {format.bvolume}                             % in het Nederlands (WS)
{ volume empty$
    { "" }
    { series empty$
      { ", deel"  }
      { ", "  series emphasize * ", deel" * }
      if$
      volume tie.or.space.connect
    }
  if$
}

FUNCTION {format.number.series}                       % in het Nederlands (WS)
{ volume empty$
    { number empty$
        { series field.or.null }
        { series empty$
            { "there's a number but no series in " cite$ * warning$ }
            { series number tie.or.space.connect }
          if$
        }
      if$
    }
    { "" }
  if$
}

FUNCTION {format.edition}                             % in het Nederlands (WS)
{ edition empty$
    { "" }
    { edition "1" =
        { "Eerste" }
        { edition "2" =
            { "Tweede" }
            { edition "3" =
                { "Derde" }
                { edition "$^{\rm e}$ " * }
                if$
            }
            if$
        }
        if$
        output.state mid.sentence =
            { "l" change.case$ " druk" * }
            { "t" change.case$ " druk" * }
            if$
    }
    if$
}

INTEGERS { multiresult }

FUNCTION {multi.page.check}
{ 't :=
  #0 'multiresult :=
    { multiresult not
      t empty$ not
      and
    }
    { t #1 #1 substring$
      duplicate$ "-" =
      swap$ duplicate$ "," =
      swap$ "+" =
      or or
    { #1 'multiresult := }
    { t #2 global.max$ substring$ 't := }
      if$
    }
  while$
  multiresult
}

FUNCTION {format.pages}
{ pages empty$
    { "" }
    { pages multi.page.check
    { "p." pages n.dashify tie.or.space.connect }
    { "p." pages tie.or.space.connect }
      if$
    }
  if$
}

FUNCTION {format.vol.num.pages}
{ volume field.or.null
  number empty$
    'skip$
    { "(" number * ")" * *
      volume empty$
    { "there's a number but no volume in " cite$ * warning$ }
    'skip$
      if$
    }
  if$
  pages empty$
    'skip$
    { duplicate$ empty$
    { pop$ format.pages }
    { ":" * pages n.dashify * }
      if$
    }
  if$
}

FUNCTION {format.vol.year}
{ volume field.or.null
  year empty$
    { "empty year in " cite$ * warning$ }
    { " (" year * ")" * * }
  if$
}

FUNCTION {format.chapter.pages}                       % in het Nederlands (WS)
{ chapter empty$
    'format.pages
    { type empty$
        { output.state mid.sentence =
          { "hoofdstuk" }
          { "Hoofdstuk" }
          if$
         }
        { type "l" change.case$ }
      if$
      chapter tie.or.space.connect
      pages empty$
        'skip$
        { ", " * format.pages * }
      if$
    }
  if$
}

FUNCTION {format.in.ed.booktitle}                     % in het Nederlands (WS)
{ booktitle empty$                                    %
    { "" }
    { editor empty$
      { output.state mid.sentence =
        { "in " booktitle emphasize * }
        { "In " booktitle emphasize * }
        if$ }
      { output.state mid.sentence =
        { "in " booktitle emphasize * ", " * format.editors * }
        { "In " booktitle emphasize * ", " * format.editors * }
        if$ }
      if$
    }
  if$
}

FUNCTION {empty.misc.check}
{ author empty$ title empty$ howpublished empty$
  month empty$ year empty$ note empty$
  and and and and and

  key empty$ not and

    { "all relevant fields are empty in " cite$ * warning$ }
    'skip$
  if$
}

FUNCTION {format.thesis.type}
{ type empty$
    'skip$
    { pop$
      type "t" change.case$
    }
  if$
}

FUNCTION {format.preprint.number}
{ type empty$
    { "Preprint" }
    'type
  if$
  number empty$
    { "t" change.case$ }
    { number tie.or.space.connect }
  if$
}

FUNCTION {format.tr.number}
{ type empty$
    { "Technical Report" }
    'type
  if$
  number empty$
    { "t" change.case$ }
    { number tie.or.space.connect }
  if$
}

FUNCTION {format.article.crossref}
{ key empty$
    { journal empty$
    { "need key or journal for " cite$ * " to crossref " * crossref *
      warning$
      ""
    }
    { "In {\em " journal * "\/}" * }
      if$
    }
    { "In " key * }
  if$
  " \shortcite{" * crossref * "}" *
}

FUNCTION {format.crossref.editor}
{ editor #1 "{vv~}{ll}" format.name$
  editor num.names$ duplicate$
  #2 >
    { pop$ "{\em ~et~al.}" * }
    { #2 <
    'skip$
    { editor #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
        { " {\em ~et~al.}" * }
        { " \& " * editor #2 "{vv~}{ll}" format.name$ * }
      if$
    }
      if$
    }
  if$
}

FUNCTION {format.book.crossref}
{ volume empty$
    { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
      "In "
    }
    { "Volume" volume tie.or.space.connect
      " of " *
    }
  if$
  editor empty$
  editor field.or.null author field.or.null =
  or
    { key empty$
    { series empty$
        { "need editor, key, or series for " cite$ * " to crossref " *
          crossref * warning$
          "" *
        }
        { "{\em " * series * "\/}" * }
      if$
    }
    { key * }
      if$
    }
    { format.crossref.editor * }
  if$
  " \shortcite{" * crossref * "}" *
}

FUNCTION {institution.or.organization.output}
{institution empty$
 {organization empty$
  { "Both organization and institution are missing in " cite$ * warning$ }
  { organization output }
  if$
 }
 {institution output}
if$
}

FUNCTION {format.incoll.inproc.crossref}
{ editor empty$
  editor field.or.null author field.or.null =
  or
    { key empty$
    { booktitle empty$
        { "need editor, key, or booktitle for " cite$ * " to crossref " *
          crossref * warning$
          ""
        }
        { "In {\em " booktitle * "\/}" * }
      if$
    }
    { "In " key * }
      if$
    }
    { "In " format.crossref.editor * }
  if$
  " \shortcite{" * crossref * "}" *
}

FUNCTION {article}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { journal emphasize "journal" output.check
      format.vol.year output
      format.pages output
    }
    { format.article.crossref output.nonnull
      format.pages output
    }
  if$
  new.block
  note output
  fin.entry
}

FUNCTION {book}
{ output.bibitem
  author empty$
    { format.editors "author and editor" output.check }
    { format.authors output.nonnull
      crossref missing$
    { "author and editor" editor either.or.check }
    'skip$
      if$
    }
  if$
  new.block
  format.btitle "title" output.check
  crossref missing$
    { format.bvolume output
      new.block
      format.number.series output
      new.sentence
      publisher "publisher" output.check
      address output
    }
    { new.block
      format.book.crossref output.nonnull
    }
  if$
  format.edition output
  format.date "year" output.check
  new.block
  note output
  fin.entry
}

FUNCTION {booklet}
{ output.bibitem
  format.authors output
  new.block
  format.title "title" output.check
  howpublished address new.block.checkb
  howpublished output
  address output
  format.date output
  new.block
  note output
  fin.entry
}

FUNCTION {inbook}                     % produceert zowel hoofdstuk-
{ output.bibitem                      % als boektitel  (WS)
  author empty$                       % zie ook format.in.ed.booktitle
    { format.editors "author and editor" output.check }
    { format.authors output.nonnull
      crossref missing$
        { "author and editor" editor either.or.check }
        'skip$
      if$
    }
  if$
  new.block
  format.btitle "title" output.check
  crossref missing$
    { format.bvolume output
      format.chapter.pages "chapter and pages" output.check
      format.in.ed.booktitle output
      new.block
      format.number.series output
      new.sentence
      publisher "publisher" output.check
      address output
    }
    { format.chapter.pages "chapter and pages" output.check
      new.block
      format.book.crossref output.nonnull
    }
  if$
  format.edition output
  format.date "year" output.check
  new.block
  note output
  fin.entry
}

FUNCTION {incollection}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { format.in.ed.booktitle "booktitle" output.check
      format.bvolume output
      format.number.series output
      format.chapter.pages output
      new.sentence
      publisher "publisher" output.check
      address output
      format.edition output
      format.date "year" output.check
    }
    { format.incoll.inproc.crossref output.nonnull
      format.chapter.pages output
    }
  if$
  new.block
  note output
  fin.entry
}

FUNCTION {inproceedings}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  crossref missing$
    { format.in.ed.booktitle "booktitle" output.check
      format.bvolume output
      format.number.series output
      format.pages output
      address empty$
    { organization publisher new.sentence.checkb
      organization output
      publisher output
      format.date "year" output.check
    }
    { address output.nonnull
      format.date "year" output.check
      new.sentence
      organization output
      publisher output
    }
      if$
    }
    { format.incoll.inproc.crossref output.nonnull
      format.pages output
    }
  if$
  new.block
  note output
  fin.entry
}

FUNCTION {conference} { inproceedings }

FUNCTION {manual}
{ output.bibitem
  author empty$
    { organization empty$
    'skip$
    { organization output.nonnull
      address output
    }
      if$
    }
    { format.authors output.nonnull }
  if$
  new.block
  format.btitle "title" output.check
  author empty$
    { organization empty$
    { address new.block.checka
      address output
    }
    'skip$
      if$
    }
    { organization address new.block.checkb
      organization output
      address output
    }
  if$
  format.edition output
  format.date output
  new.block
  note output
  fin.entry
}

FUNCTION {mastersthesis}                % doctoraalscriptie (WS)
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.btitle "title" output.check
  new.block
  "Doctoraalscriptie" format.thesis.type output.nonnull
  school "school" output.check
  address output
  format.date "year" output.check
  number empty$
         { skip$ }
         { " (Nr. " number * ")" * output }
         if$
  new.block
  note output
  fin.entry
}

FUNCTION {misc}
{ output.bibitem
  format.authors output
  title howpublished new.block.checkb
  format.title output
  howpublished new.block.checka
  howpublished output
  format.date output
  new.block
  note output
  fin.entry
  empty.misc.check
}

FUNCTION {phdthesis}                                     % proefschrift (WS)
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.btitle "title" output.check
  new.block
  "Dissertatie" format.thesis.type output.nonnull
  school "school" output.check
  address output
  format.date "year" output.check
  new.block
  note output
  fin.entry
}

FUNCTION {preprint}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  format.preprint.number output.nonnull
  institution.or.organization.output
  publisher output
  address output
  format.date "year" output.check
  new.block
  note output
  fin.entry
}

FUNCTION {proceedings}
{ output.bibitem
  editor empty$
    { organization output }
    { format.editors output.nonnull }
  if$
  new.block
  format.btitle "title" output.check
  format.bvolume output
  format.number.series output
  address empty$
    { editor empty$
    { publisher new.sentence.checka }
    { organization publisher new.sentence.checkb
      organization output
    }
      if$
      publisher output
      format.date "year" output.check
    }
    { address output.nonnull
      format.date "year" output.check
      new.sentence
      editor empty$
    'skip$
    { organization output }
      if$
      publisher output
    }
  if$
  new.block
  note output
  fin.entry
}

FUNCTION {techreport}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  format.tr.number output.nonnull
  institution "institution" output.check
  address output
  format.date "year" output.check
  new.block
  note output
  fin.entry
}

FUNCTION {unpublished}
{ output.bibitem
  format.authors "author" output.check
  new.block
  format.title "title" output.check
  new.block
  note "note" output.check
  format.date output
  fin.entry
}

FUNCTION {default.type} { misc }

MACRO {jan} {"januari"}
MACRO {feb} {"februari"}
MACRO {mar} {"maart"}
MACRO {apr} {"april"}
MACRO {may} {"mei"}
MACRO {jun} {"juni"}
MACRO {jul} {"juli"}
MACRO {aug} {"augustus"}
MACRO {sep} {"september"}
MACRO {oct} {"oktober"}
MACRO {nov} {"november"}
MACRO {dec} {"december"}

MACRO {AcP}    {"Acta Physica"}
MACRO {AcPA}   {"Acta Physica Austriaca"}
MACRO {AcPP}   {"Acta Physica Polonica"}
MACRO {AdP}    {"Advances in Physics"}
MACRO {AdNP}   {"Advances in Nuclear Physics"}
MACRO {AmJP}   {"American Journal of Physics"}
MACRO {AnPDu}  {"Annalen der Physik (Leipzig)"}
MACRO {AnPFr}  {"Annales de Physique (Paris)"}
MACRO {AnPNY}  {"Annals of Physics (NY)"}
MACRO {ARevNS} {"Annual Review of Nuclear Science"}
MACRO {ADNDT}  {"Atomic Data and Nuclear Data Tables"}
MACRO {AusJP}  {"Australian Journal of Physics"}
MACRO {CanJP}  {"Canadian Journal Physics"}
MACRO {CPC}    {"Computer Physics Communications"}
MACRO {EJP}    {"European Journal of Physics"}
MACRO {EPL}    {"Europhysics Letters"}
MACRO {FBS}    {"Few Body Systems"}
MACRO {FBSSup} {"Few Body Systems Supplement"}
MACRO {FortP}  {"Fortschritte der Physik"}
MACRO {HePA}   {"Helvetica Physica Acta"}
MACRO {IEEE}   {"IEEE Transactions"}
MACRO {IJMP}   {"International Journal of Modern Physics"}
MACRO {JETP}   {"JETP"}
MACRO {JETPL}  {"JETP Letters"}
MACRO {JaFi}   {"{\cyr {\Ja}derna\ja Fizika}"}
MACRO {JPFr}   {"Journal de Physique (Paris)"}
MACRO {JP}     {"Journal of Physics"}
MACRO {JPSJ}   {"Journal of the Physical Society of Japan"}
MACRO {JPSJSup}{"Journal of the Physical Society of Japan Supplement"}
MACRO {MPL}    {"Modern Physics Letters"}
MACRO {NCim}   {"Il Nuovo Cimento"}
MACRO {NDS}    {"Nuclear Data Sheets"}
MACRO {NP}     {"Nuclear Physics"}
MACRO {PL}     {"Physics Letters"}
MACRO {PRSLon} {"Proceedings of the Royal Society of London"}
MACRO {PR}     {"Physical Review"}
MACRO {PRL}    {"Physical Review Letters"}
MACRO {PRep}   {"Physics Reports"}
MACRO {PScr}   {"Physica Scripta"}
MACRO {PToday} {"Physics Today"}
MACRO {PTP}    {"Progress of Theoretical Physics"}
MACRO {RMP}    {"Reviews of Modern Physics"}
MACRO {ScAm}   {"Scientific American"}
MACRO {SSin}   {"Scienta Sinica"}
MACRO {SovJNP} {"Soviet Journal of Nuclear Physics"}
MACRO {SovJPN} {"Soviet Journal of Particles and Nuclei"}
MACRO {SovPDo} {"Soviet Physics Doklady"}
MACRO {SovPUs} {"Soviet Physics Uspekhi"}
MACRO {STS}    {"Bulletin of Science, Technology and Social Affairs"}
MACRO {ZfN}    {"Zeitschrift f{\H{u}}r Naturforschung"}
MACRO {ZfP}    {"Zeitschrift f{\H{u}}r Physik"}

MACRO {KUN} {"Katholieke Universiteit Nijmegen"}
MACRO {RUU} {"Rijksuniversiteit te Utrecht"}
MACRO {UvA} {"Universiteit van Amsterdam"}
MACRO {RUG} {"Rijksuniversiteit te Groningen"}
MACRO {RUL} {"Rijksuniversiteit te Leiden"}
MACRO {VU}  {"Vrije Universiteit"}
MACRO {TUD} {"Technische Universiteit Delft"}

READ

FUNCTION {sortify}
{ purify$
  "l" change.case$
}

INTEGERS { numberlen numberzero}

FUNCTION {numsortify}
{ purify$
  "l" change.case$
  's :=
  #1 'numberlen :=
  { s numberlen #1 substring$ "1" =
    s numberlen #1 substring$ "2" =
    s numberlen #1 substring$ "3" =
    s numberlen #1 substring$ "4" =
    s numberlen #1 substring$ "5" =
    s numberlen #1 substring$ "6" =
    s numberlen #1 substring$ "7" =
    s numberlen #1 substring$ "8" =
    s numberlen #1 substring$ "9" =
    s numberlen #1 substring$ "0" =
    or or or or or or or or or    }
  { numberlen #1 + 'numberlen :=  }
  while$
  #6 numberlen -  'numberzero :=
  "000000" #1 numberzero substring$
  s *
}
INTEGERS { len }

FUNCTION {chop.word}
{ 's :=
  'len :=
  s #1 len substring$ =
    { s len #1 + global.max$ substring$ }
    's
  if$
}

INTEGERS { et.al.char.used }

FUNCTION {initialize.et.al.char.used}
{ #0 'et.al.char.used :=
}

EXECUTE {initialize.et.al.char.used}

FUNCTION {format.lab.names}
{ 's :=
  s num.names$ 'numnames :=

  numnames #1 =                               % maak het citatielabel dat
    { s #1 "{vv~}{ll}" format.name$ }         % wordt afgedrukt
    { numnames #2 =                           %  b.v.  "van Dale"     (WS)
        {s #1 "{vv~}{ll} " format.name$
         s #2 "{ll}" format.name$ "others" =
                { s #2 "\bgroup\em~et~al.\egroup" format.name$ * }
                { s #2 " \& {vv~}{ll}" format.name$ * }
         if$
        }
        { s #1 "{vv~}{ll} \bgroup\em~et~al.\egroup" format.name$ }
      if$
    }
  if$

}

FUNCTION {author.key.label}
{ author empty$
    { key empty$
    { cite$ #1 #3 substring$ }
    { key }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {author.editor.key.label}
{ author empty$
    { editor empty$
    { key empty$

        { cite$ #1 #3 substring$ }

        { key }
      if$
    }
    { editor format.lab.names }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {author.key.organization.label}
{ author empty$
    { key empty$
    { organization empty$

        { cite$ #1 #3 substring$ }

        { "The " #4 organization chop.word #3 text.prefix$ }
      if$
    }
    { key }
      if$
    }
    { author format.lab.names }
  if$
}

FUNCTION {editor.key.organization.label}
{ editor empty$
    { key empty$
    { organization empty$

        { cite$ #1 #3 substring$ }

        { "The " #4 organization chop.word #3 text.prefix$ }
      if$
    }
    { key }
      if$
    }
    { editor format.lab.names }
  if$
}

FUNCTION {calc.label}
{ type$ "book" =
  type$ "inbook" =
  or
    'author.editor.key.label
    { type$ "proceedings" =
    'editor.key.organization.label
    { type$ "manual" =
        'author.key.organization.label
        'author.key.label
      if$
    }
      if$
    }
  if$
  "\protect\citeauthoryear{" swap$ * "}{" *
  year field.or.null purify$ *  % CHANGED - pfps - 15 Feb 1989
  'label :=                     % maak het af te drukken citeerlabel
}

FUNCTION {sort.format.names}
{ 's :=
  #1 'nameptr :=
  ""
  s num.names$ 'numnames :=
  numnames 'namesleft :=
    { namesleft #0 > }
    { nameptr #1 >
    { "   " * }
    'skip$
      if$                 % het sorteerlabel begrijpt Nederlandse namen
                          % b.v  "Dale van JH"   (WS)
      s nameptr "{ll{ }}{vv{ }}{  f{ }}{  jj{ }}" format.name$ 't :=
      nameptr numnames = t "others" = and
    { "{\em~et~al}" * }
    { t sortify * }
      if$
      nameptr #1 + 'nameptr :=
      namesleft #1 - 'namesleft :=
    }
  while$
}

FUNCTION {sort.format.title}
{ 't :=
  "De " #2                                % titels worden gesorteerd
   "Een " #3                              % op het lidwoord na  (WS)
    "A " #4
     "An " #5
      "The " #6 t chop.word
              chop.word
          chop.word
      chop.word
  chop.word
  sortify
  #1 global.max$ substring$
}

FUNCTION {author.sort}
{ author empty$
    { key empty$
    { "to sort, need author or key in " cite$ * warning$
      ""
    }
    { key sortify }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {author.editor.sort}
{ author empty$
    { editor empty$
    { key empty$
        { "to sort, need author, editor, or key in " cite$ * warning$
          ""
        }
        { key sortify }
      if$
    }
    { editor sort.format.names }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {author.organization.sort}
{ author empty$
    { organization empty$
    { key empty$
        { "to sort, need author, organization, or key in " cite$ * warning$
          ""
        }
        { key sortify }
      if$
    }
    { "The " #4 organization chop.word sortify }
      if$
    }
    { author sort.format.names }
  if$
}

FUNCTION {editor.organization.sort}
{ editor empty$
    { organization empty$
    { key empty$
        { "to sort, need editor, organization, or key in " cite$ * warning$
          ""
        }
        { key sortify }
      if$
    }
    { "The " #4 organization chop.word sortify }
      if$
    }
    { editor sort.format.names }
  if$
}

FUNCTION {presort}
{ calc.label                                 % maak het label dat wordt afgedrukt
  " "                                        %
  type$ "book" =                             % maak nu het sorteerlabel
  type$ "inbook" =                           % (WS)
  or
    'author.editor.sort
    { type$ "proceedings" =
        'editor.organization.sort
        { type$ "manual" =
            'author.organization.sort
            'author.sort
          if$
        }
      if$
    }
  if$
  *
  "                                  "
  *
  year field.or.null sortify
  *
  type$ "article" =
        { " " *
          journal field.or.null sortify *
          volume  field.or.null numsortify *
          pages   field.or.null numsortify * }
        { skip$    }
        if$
  "    "
  *
  title field.or.null
  sort.format.title
  *
  #1 entry.max$ substring$
  'sort.key$ :=
}

ITERATE {presort}

SORT

STRINGS { longest.label last.sort.label next.extra }

INTEGERS { longest.label.width last.extra.num }

FUNCTION {initialize.longest.label}
{ "" 'longest.label :=
  #0 int.to.chr$ 'last.sort.label :=
  "" 'next.extra :=
  #0 'longest.label.width :=
  #0 'last.extra.num :=
}

FUNCTION {forward.pass}
{ last.sort.label label =
    { last.extra.num #1 + 'last.extra.num :=
      last.extra.num int.to.chr$ 'extra.label :=
    }
    { "a" chr.to.int$ 'last.extra.num :=
      "" 'extra.label :=
      label 'last.sort.label :=
    }
  if$
}

FUNCTION {reverse.pass}
{ next.extra "b" =
    { "a" 'extra.label := }
    'skip$
  if$
  label extra.label * "}" * 'label :=   % CHANGED - pfps 15 Feb 1989
  label width$ longest.label.width >
    { label 'longest.label :=
      label width$ 'longest.label.width :=
    }
    'skip$
  if$
  extra.label 'next.extra :=
}

EXECUTE {initialize.longest.label}

ITERATE {forward.pass}

REVERSE {reverse.pass}

FUNCTION {begin.bib}

{ et.al.char.used
    { "\newcommand{\etalchar}[1]{$^{#1}$}" write$ newline$ }
    'skip$
  if$
  preamble$ empty$

    'skip$
    { preamble$ write$ newline$ }
  if$

  "\begin{thebibliography}{}" write$ newline$

}

EXECUTE {begin.bib}

EXECUTE {init.state.consts}

ITERATE {call.type$}

FUNCTION {end.bib}
{ newline$
  "\end{thebibliography}" write$ newline$
}

EXECUTE {end.bib}






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