Re: [NTG-context] XML to ConTeXt: converting date attribute from ISO date

15 Aug 2018


      On 8/15/2018 12:27 PM, Mike O'Connor wrote:
...
G’Day,
Having a first go at converting TEI XML to ConTeXt.
Steep learning curve, but easier (for me) than XSLT, and first results 
were amazing.  Using 
http://www.pragma-ade.com/general/manuals/xml-mkiv.pdf as a guide.
Currently stuck on converting an ISO format date (eg. 1908-01-10) into 
something more readable (eg. 10 January 1908) in the output.  I presume 
I should create a function (?luacode) that can take any ISO value and 
output the readable form.  The following works but seems to me inefficient.
Grateful for any pointers.
Mike
Here is my MWE:
\startbuffer[demo]
<TEI>
     <text>
         <body>
             <div type="letter">
                 <opener>
                     <date when-iso="1908-01-10" 
type="divDate">10.I.08</date>
                 </opener>
                 <closer>
<date when-iso="1908-03-19" type="secondDate">19 Mar '08</date>
                 </closer>
             </div>
         </body>
     </text>
</TEI>
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}{date}{xml:date}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:date
\xmldoifelse {#1}{.[@type='divDate']} {
\def\docdate{\ctxlua{
local tyear = string.sub('\xmlatt{#1}{when-iso}',1,4)
local tmonth = string.sub('\xmlatt{#1}{when-iso}',6,7)
local tday = string.sub('\xmlatt{#1}{when-iso}',9,10)
context.date{d = tday, m = tmonth, y = tyear}
}}
\docdate[day,month,year] = Document Date \par
     } {
\def\docdate{\ctxlua{
local tyear = string.sub('\xmlatt{#1}{when-iso}',1,4)
local tmonth = string.sub('\xmlatt{#1}{when-iso}',6,7)
local tday = string.sub('\xmlatt{#1}{when-iso}',9,10)
context.date{d = tday, m = tmonth, y = tyear}
}}
\docdate[day,month,year] = Event Date\par
}
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
Can be wikified ...
\startluacode
     function xml.finalizers.tex.MyDate(e,what,how)
         local t = string.split(e[1].at[what],"-")
         context.date(
             { y = t[1], m = t[2], d = t[3] },
             { how }
         )
     end
\stopluacode

\startxmlsetups xml:date

	\xmldoifelse {#1}{.[@type='divDate']} {
         \xmlfilter{#1}{./MyDate("when-iso","day,month,year")}\
     	Document Date \par
     } {
         \xmlfilter{#1}{./MyDate("when-iso","day,month,year")}\
         Event Date\par

	}
\stopxmlsetups

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