I cou= ld not find any existing solution for using Chicago-Turabian "note" style i= n ConTeXt, so I have started my own attempt.

Chicago-Turabian u= ses footnotes to display the author's details on the same page, but also us= es a bibliography to display an alphabetical list of the sources again at t= he end. The footnotes display somewhat differently each time a source is sh= own. The first time a source is cited, the footnote contains a long, detail= ed reference. Subsequent reappearances of the same citation are abbreviated= somewhat. And "ibid" is used when the source is cited twice in a row. The = bibliography entry contains really detailed information, similar to what wa= s shown in the first footnote, with minor differences.

This code uses three macros: \tu= rabian, used only the first time a source is reference, \shortturabian, use= d for subsequent references of the same source, and `\ibid, for when a sour= ce is referenced twice in a row. Each of these macros simply creates a foot= note, showing the author's details, and also uses \nocite to make sure an e= ntry is added to \placelistofpublications. Page details are optionally adde= d in #2, and this information only appears in the footnotes.

I am = having trouble getting the code to display the author's names correctly. Ev= ery attempt ends with strange results, like "FirstLast" with no space or ju= st "Initial Last". Chicago-Turabian displays the names differently, dependi= ng on the placement:

(1) First, the \turabian macro should show in o= rdinary First + Last order in the footnote, example: "Anna Burns, Robert Sm= ith, and Judith Green", but if the number of authors exceeds 3, it display = "Anna Burns et al."

(2) Second, the \shorturabian macro should show = just the Last names in the footnote: "Burns, Smith, and Green", also using = "Burns et al." if there are more than 3 names.

(3) The \ibid macro d= oesn't show any names.

(4) Fi= nally, the actual bibliographic entry in \placelistofpublications uses a st= range format, with the first author listed as Last + First order, all subse= quent authors in First + Last order, such as "Burns, Anna, Robert Smith, an= d Judith Green.", meanwhile "et al." is never used in the bibliography, eve= n if there are 100 authors.

Any help would be greatly apprecia= ted!

--Joel

Minimal working example follows:

\startbuffer [bib]
@Bo= ok{ball1996,
author =3D {Ball, Larry},
title =3D {Desert lawmen: The = high sheriffs \word{of} New Mexico \word{and} Arizona, 1846-1912},
publi= sher =3D {University \word{of} New Mexico Press},
year =3D {1996},
ad= dress =3D {Albuquerque, NM},
isbn =3D {9780826317001}
}

= @Book{minear2009,
author =3D {Minear, Tish and Limon, Janet},
title = =3D {Discover Native America: Arizona, Colorado, New Mexico, \word{and} Uta= h},
publisher =3D {Hippocrene Books},
year =3D {2009},
address =3D= {New York, NY},
isbn =3D {9780781803274}
}

\stopbuffer
\define[3]\ifisempty{%
       \setbox0= =3D\hbox{#1\unskip}%
       \ifdim\wd0=3D= 0pt
           #2%
&nbs= p;     \else
       =     #3%
       \fi}%

\usebtxdataset[bib.buffer]

\startbtxrenderingdefinitions= [chicagonum]

\definebtx[chicagonum]
   [default= =3Ddefault,
   specification=3Dchicagonum,
&nbs= p; otherstext=3D{\btxspace{\it\btxlabeltext{others}}},
  = ; etallimit=3D10,
   etaldisplay=3D\btxparameter\c= !etallimit,
   journalconversion=3D\v!normal,
&= nbsp; monthconversion=3D\v!month,
   title=3Dyes,<= br>   separator:names:2=3D{\btxcomma},
   &nbs= p;separator:names:3=3D{\btxcomma\btxlabeltext{and}\space},
   = separator:names:4=3D{\btxspace\btxlabeltext{and}\space}]
&n= bsp;
\setupbtxlist[chicagonum]

\definebtxrendering[chicagonum]   [specification=3Dchicagonum,
   sort= type=3Dauthoryear,
   numbering=3Dno]

\starts= etups btx:chicagonum:list:book
   \btxdoif{author}{
&= nbsp;     \btxflush{author}
   &nbs= p;   \btxperiod
   }
   &nb= sp;\btxdoif{title}{
       {\it\Words \bt= xflush{title}}
       \btxperiod
= ; }
   \btxdoif{address}{
   &n= bsp;   \btxflush{address}
      = ; \btxcolon
   }
   \btxdoif{pu= blisher}{
       \btxflush{publisher}
=        \btxcomma
   }
=    \btxdoif{year}{
       = ;\btxflush{year}
       \btxperiod
&nb= sp; }
   \removeunwantedspaces
\stopsetup= s

\startsetups btx:chicagonum:list:article
   = ;\btxdoif{author}{
       \btxflush{autho= r}
       \btxperiod
   &nbs= p;}
   \btxdoif{title}{
     &nbs= p; \quotation{\Words \btxflush{title}}
     &n= bsp; \btxperiod
   }
   \btxdoi= f{journal}{
       {\it\Words \btxflush{j= ournal}}
   }
   \= btxdoif{volume}{
       \btxflush{volume}=
       \btxcomma
   }=
   \btxdoif{number}{
      = no.~\btxflush{number}
   }
   = \btxdoifelse{month}{
       (\btxflush{mo= nth} \btxflush{year})
       \btxcolon   }{
       \btxdoif{ye= ar}{
           (\btxflush= {year})
       }
   &n= bsp; \btxcolon
   }
   \btxdoif= {pages}{
       \btxflush{pages}
= ;     \btxperiod
   }
&nbs= p; \removeunwantedspaces
\stopsetups

\stopbtxrenderin= gdefinitions

\setupbtx[chicagonum][dataset=3Ddefault,
&= nbsp; authorconversion=3D{normal},
     etalli= mit=3D]

\setupbtx[chicagonum:list:author]
    [aut= horconversion=3D{normal},
     etallimit=3D]
\set= upbtx[chicagonum:cite:author]
    [authorconversion=3D{no= rmal},
     etallimit=3D3,
   &nbs= p; etaldisplay=3D1]

\usebtxdefinitions[chicagonum]

\define[2]= \turabian{%
   \footnote{%
     &= nbsp; \ifisempty{\cite[author][#1]}{}{\cite[author][#1]}%
&n= bsp;     \ifisempty{\cite[title][#1]}{}{,\ {\it\Words = \cite[title][#1].}}%
       \ifisempty{\c= ite[address][#1]\cite[publisher][#1]\cite[year][#1]}{}{\ (}%
  = ;         \cite[address][#1]: ~%
&nb= sp;         \ifisempty{\cite[jour= nal][#1]}{\ifisempty{\cite[publisher][#1]}{}{\cite[publisher][#1]:\ }}{\cit= e[journal][#1]:\ }%
           &= nbsp;\ifisempty{\cite[year][#1]}{}{,\ \cite[year][#1]}%
   &nb= sp;   \ifisempty{\cite[address][#1]\cite[publisher][#1]\cit= e[year][#1]}{}{)}%
       \ifisempty{#2}{= .}{,\ #2.}%
   }%
   \nocite[#1]%
= }%

\define[2]\shortturabian{%
   \footnote{%<= br>       \ifisempty{\cite[author][#1]}{}{\c= ite[author][#1]}%
       \ifisempty{#2}{.= }{,\ #2.}%
   }%
   \nocite[#1]%
}= %

\define[2]\ibid{
   \footnote{%
  =     Ibid\ifisempty{#2}{.}{,\ #2.}%
   &n= bsp;}%
   \nocite[#1]%
}

\starttext

&nb= sp; \input knuth \turabian{ball1996}{1\endash 23}   &= nbsp;

   \input knuth \turabian{m= inear2009}{32\endash 23}

     = ; \ibid{minear2009}{32\endash 23}
     &= nbsp; \ibid{minear2009}{}
   \input knuth \turabia= n{ball1996}{}

   &nb= sp;\input knuth \shortturabian{minear2009}{121\endash 99}
   &= nbsp;
   \startchapter[title=3DBibliography]
&n= bsp;     \placelistofpublications
   &nbs= p;\stopchapter

\stoptext

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