Joel,

I've attempted to incorporate= most of these features for the SBL citation style (which derives most of t= he same rules from Chicago) for ConTeXt. You can use my code in=C2=A0https://g= ithub.com/jjmccollum/context-sbl as a template for now, if you'd li= ke; we're still waiting for the code to be incorporated into a future C= onTeXt update. Regarding the specific features you described:

(1) The rules for first name-last name authorconversions and et= al. limits for inline citations (i.e., ones in the text/footnotes, but not= in the bibliographic list) can be implemented using the general \definebtx= [chicagonum:\s!cite] command. In publ-imp-sbl.mkvi, I do this as follows:

\definebtx
=C2=A0 [sbl:\s!cite]
=C2=A0 [sbl]
=C2=A0 [\= c!alternative=3Dfootnote, % by default, SBL uses footnote citation format (= defined below)
=C2=A0 =C2=A0\c!otherstext=3D{\btxspace\btxlabeltext{othe= rs}}, % use et al. for truncated author / editor list
=C2=A0 =C2=A0\c!et= allimit=3D3, % don't use et al. for 3 or fewer authors
=C2=A0 =C2=A0= \c!etaldisplay=3D1, % but if there are > 3, then only list the first exp= licitly
=C2=A0 =C2=A0\c!etaloption=3Dlast,
=C2=A0 =C2=A0\c!authorconv= ersion=3D\v!normal, % by default, use normal name order for in-text citatio= ns
=C2=A0 =C2=A0...
=C2=A0 ]

(2) SBL also uses short-form cita= tions for inline citations after the first one. To make these work, it ende= d up being easiest to create distinct \fastsetups=C2=A0for an "inlines= hort" style. Here is how I handled the citation of the author in such = instances in=C2=A0publ-imp-sbl.mkvi=C2=A0 :

\starttexdef= inition btx:sbl:inlineshort:author
=C2=A0 \btxdoif{author} {
=C2=A0 = =C2=A0 % If the useidem option is set and this author matches the previousl= y cited author, then just print "idem";
=C2=A0 =C2=A0 % otherw= ise, print the author/editor's last name
=C2=A0 =C2=A0 \doifelse{\bt= xparameter{useidem}} {\v!yes} {
=C2=A0 =C2=A0 =C2=A0 \texdefinition{btx:= sbl:doifsamefoundnameauthorelse}{\currentbtxtag}{\getvariable{btx:sbl}{prev= iousinlinetag}} {
=C2=A0 =C2=A0 =C2=A0 =C2=A0 \btxlabeltext{sbl:idem}=C2=A0 =C2=A0 =C2=A0 } {
=C2=A0 =C2=A0 =C2=A0 =C2=A0 \currentbtxciteaut= horbyfield
=C2=A0 =C2=A0 =C2=A0 }
=C2=A0 =C2=A0 } {
=C2=A0 =C2=A0 = =C2=A0 \currentbtxciteauthorbyfield
=C2=A0 =C2=A0 }
=C2=A0 =C2=A0 \bt= xcomma
=C2=A0 }
\stoptexdefinition

(3) I haven't implement= ed support for ibid. tracking (it's on a wishlist that I sent to Hans a= nd Alan, as it would best be handled by changes to the core publication sup= port module), so I'm afraid I can't help you on that at the moment.= There is some placeholder code in publ-imp-sbl.mkvi for handling this when= ibid. tracking is eventually implemented, so you might be able to use that= as a template.

(4) To get the "inverted first author" aut= horconversion working, I had to create new authorconversions for this. You = can find this in the updated publ-imp-author.mkvi file in my GitHub repo:
\startsetups \s!btx:\s!list:\s!author:invertedfirst
=C2=A0 =C2=A0 = \ifnum\currentbtxauthorindex>\plusone
=C2=A0 =C2=A0 =C2=A0 =C2=A0 \fa= stsetup{\s!btx:\s!list:\s!author:normal}
=C2=A0 =C2=A0 \else
=C2=A0 = =C2=A0 =C2=A0 =C2=A0 \fastsetup{\s!btx:\s!list:\s!author:inverted}
=C2= =A0 =C2=A0 \fi
\stopsetups

\startsetups \s!btx:\s!cite:\s!author:= invertedfirst
=C2=A0 =C2=A0 \ifnum\currentbtxauthorindex>\plusone
= =C2=A0 =C2=A0 =C2=A0 =C2=A0 \fastsetup{\s!btx:\s!cite:\s!author:normal}
= =C2=A0 =C2=A0 \else
=C2=A0 =C2=A0 =C2=A0 =C2=A0 \fastsetup{\s!btx:\s!cit= e:\s!author:inverted}
=C2=A0 =C2=A0 \fi
\stopsetups

Then, in p= ubl-imp-sbl.mkvi, I invoke this setup in the \btxsetup for citations in the= bibliographic list as follows:

\definebtx
=C2=A0 [sbl:\s!list:au= thor]
=C2=A0 [sbl:\s!list]
=C2=A0 [\c!authorconversion=3Dinvertedfirs= t,
=C2=A0 \c!separator:names:4=3D{\btxcomma\btxlabeltext{and}\space}] % = between only 2 names

I hope this helps!

Joe= y

On Tue, Dec 21, 2021 at 12:51 PM Joel via ntg-context <ntg-context@ntg.nl> wr= ote:

I could not find any exist= ing solution for using Chicago-Turabian "note" style in ConTeXt, = so I have started my own attempt.

Chicago-Turabian uses footnot= es to display the author's details on the same page, but also uses a bi= bliography to display an alphabetical list of the sources again at the end.= The footnotes display somewhat differently each time a source is shown. Th= e first time a source is cited, the footnote contains a long, detailed refe= rence. Subsequent reappearances of the same citation are abbreviated somewh= at. And "ibid" is used when the source is cited twice in a row. T= he bibliography entry contains really detailed information, similar to what= was shown in the first footnote, with minor differences.
This code uses three macros: \turabian, used only t= he first time a source is reference, \shortturabian, used for subsequent re= ferences of the same source, and `\ibid, for when a source is referenced tw= ice in a row. Each of these macros simply creates a footnote, showing the a= uthor's details, and also uses \nocite to make sure an entry is added t= o \placelistofpublications. Page details are optionally added in #2, and th= is information only appears in the footnotes.

I am having trouble = getting the code to display the author's names correctly. Every attempt= ends with strange results, like "FirstLast" with no space or jus= t "Initial Last". Chicago-Turabian displays the names differently= , depending on the placement:

(1) First, the \turabian macro should = show in ordinary First + Last order in the footnote, example: "Anna Bu= rns, Robert Smith, and Judith Green", but if the number of authors exc= eeds 3, it display "Anna Burns et al."

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

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

(4) Finally, the actual bibliographic entry in \pl= acelistofpublications uses a strange format, with the first author listed a= s Last + First order, all subsequent authors in First + Last order, such as= "Burns, Anna, Robert Smith, and Judith Green.", meanwhile "= et al." is never used in the bibliography, even if there are 100 autho= rs.

Any help would be greatly appreciated!
--Joel

Minimal working example follows:
=
\startbuffer [bib]
@Book{ball1996,
author =3D {Ball, Larry},
t= itle =3D {Desert lawmen: The high sheriffs \word{of} New Mexico \word{and} = Arizona, 1846-1912},
publisher =3D {University \word{of} New Mexico Pres= s},
year =3D {1996},
address =3D {Albuquerque, NM},
isbn =3D {9780= 826317001}
}
=C2=A0
@Book{minear2009,
author =3D {Minear, Tish = and Limon, Janet},
title =3D {Discover Native America: Arizona, Colorado= , New Mexico, \word{and} Utah},
publisher =3D {Hippocrene Books},
yea= r =3D {2009},
address =3D {New York, NY},
isbn =3D {9780781803274}}

\stopbuffer

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\usebtxdataset[bib.buffer]
\startbtxrenderingdefinitions[chicagonum]

\definebtx[chicagonum= ]
=C2=A0=C2=A0 =C2=A0[default=3Ddefault,
=C2=A0=C2=A0 =C2=A0specifica= tion=3Dchicagonum,
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=C2=A0=C2=A0 =C2=A0etallimit=3D10,
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=C2=A0=C2=A0 =C2=A0journalco= nversion=3D\v!normal,
=C2=A0=C2=A0 =C2=A0monthconversion=3D\v!month,
= =C2=A0=C2=A0 =C2=A0title=3Dyes,
=C2=A0=C2=A0 =C2=A0separator:names:2=3D{= \btxcomma},
=C2=A0=C2=A0 =C2=A0separator:names:3=3D{\btxcomma\btxlabelte= xt{and}\space},
=C2=A0=C2=A0 =C2=A0separator:names:4=3D{\btxspace\btxlab= eltext{and}\space}]
=C2=A0 =C2=A0
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\d= efinebtxrendering[chicagonum]
=C2=A0=C2=A0 =C2=A0[specification=3Dchicag= onum,
=C2=A0=C2=A0 =C2=A0sorttype=3Dauthoryear,
=C2=A0=C2=A0 =C2=A0nu= mbering=3Dno]

\startsetups btx:chicagonum:list:book
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=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\btxcolon
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=C2=A0=C2=A0 =C2=A0\btxdoif{publisher}{
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=C2=A0=C2=A0 =C2=A0\btxdoif{year= }{
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=C2=A0=C2=A0 =C2=A0}
=C2=A0=C2= =A0 =C2=A0\removeunwantedspaces
\stopsetups

\startsetups btx:= chicagonum:list:article
=C2=A0=C2=A0 =C2=A0\btxdoif{author}{
=C2=A0= =C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\btxflush{author}
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=C2=A0=C2=A0 =C2=A0}
=C2=A0=C2=A0 =C2=A0\b= txdoif{title}{
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\quotation{\Words \= btxflush{title}}
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\btxperiod
=C2= =A0=C2=A0 =C2=A0}
=C2=A0=C2=A0 =C2=A0\btxdoif{journal}{
=C2=A0=C2=A0 = =C2=A0=C2=A0=C2=A0 =C2=A0{\it\Words \btxflush{journal}}
=C2=A0=C2=A0 =C2= =A0}=C2=A0=C2=A0 =C2=A0
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=C2=A0=C2=A0 =C2=A0\bt= xdoif{number}{
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0no.~\btxflush{numbe= r}
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=C2=A0=C2=A0 =C2=A0\btxdoif{pages}{
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\setupbtx[chicagonum][dataset=3Ddefault,
=C2=A0=C2=A0=C2=A0 authorconve= rsion=3D{normal},
=C2=A0=C2=A0=C2=A0=C2=A0 etallimit=3D]

\setupbt= x[chicagonum:list:author]
=C2=A0=C2=A0=C2=A0 [authorconversion=3D{normal= },
=C2=A0=C2=A0=C2=A0=C2=A0 etallimit=3D]
\setupbtx[chicagonum:cite:a= uthor]
=C2=A0=C2=A0=C2=A0 [authorconversion=3D{normal},
=C2=A0=C2=A0= =C2=A0=C2=A0 etallimit=3D3,
=C2=A0=C2=A0=C2=A0=C2=A0 etaldisplay=3D1]
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\define[2]\turabian{%
=C2=A0= =C2=A0 =C2=A0\footnote{%
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempt= y{\cite[author][#1]}{}{\cite[author][#1]}%
=C2=A0=C2=A0 =C2=A0=C2=A0=C2= =A0 =C2=A0\ifisempty{\cite[title][#1]}{}{,\ {\it\Words \cite[title][#1].}}%=
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempty{\cite[address][#1]\cit= e[publisher][#1]\cite[year][#1]}{}{\ (}%
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0 =C2=A0\cite[address][#1]: ~%
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=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempty{\ci= te[year][#1]}{}{,\ \cite[year][#1]}%
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2= =A0\ifisempty{\cite[address][#1]\cite[publisher][#1]\cite[year][#1]}{}{)}%<= br>=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempty{#2}{.}{,\ #2.}%
=C2= =A0=C2=A0 =C2=A0}%
=C2=A0=C2=A0 =C2=A0\nocite[#1]%
}%

\def= ine[2]\shortturabian{%
=C2=A0=C2=A0 =C2=A0\footnote{%
=C2=A0=C2=A0 = =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempty{\cite[author][#1]}{}{\cite[author][#1]}= %
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2=A0\ifisempty{#2}{.}{,\ #2.}%
= =C2=A0=C2=A0 =C2=A0}%
=C2=A0=C2=A0 =C2=A0\nocite[#1]%
}%

\defi= ne[2]\ibid{
=C2=A0=C2=A0 =C2=A0\footnote{%
=C2=A0=C2=A0 =C2=A0=C2=A0= =C2=A0 =C2=A0Ibid\ifisempty{#2}{.}{,\ #2.}%
=C2=A0=C2=A0 =C2=A0}%
=C2= =A0=C2=A0 =C2=A0\nocite[#1]%
}

\starttext

=C2=A0=C2=A0 =C2= =A0\input knuth \turabian{ball1996}{1\endash 23}=C2=A0=C2=A0 =C2=A0
=C2= =A0=C2=A0 =C2=A0
=C2=A0=C2=A0 =C2=A0\input knuth \turabian{minear2009}{3= 2\endash 23}
=C2=A0=C2=A0 =C2=A0
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2= =A0\ibid{minear2009}{32\endash 23}
=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0 =C2= =A0\ibid{minear2009}{}
=C2=A0=C2=A0 =C2=A0\input knuth \turabian{ball199= 6}{}=C2=A0=C2=A0 =C2=A0
=C2=A0=C2=A0 =C2=A0
=C2=A0=C2=A0 =C2=A0\input= knuth \shortturabian{minear2009}{121\endash 99}
=C2=A0=C2=A0 =C2=A0
= =C2=A0=C2=A0 =C2=A0\startchapter[title=3DBibliography]
=C2=A0=C2=A0 =C2= =A0=C2=A0=C2=A0 =C2=A0\placelistofpublications
=C2=A0=C2=A0 =C2=A0\stopc= hapter

\stoptext

_____= ___________________________________________________________________________= ___
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