Thank you Thomas and Wolfgang,

About startletter / starttext: the contents of my test file reflect a moment. I 
have made numerous tests with and without starttext/stoptext. The state of the 
test file is one in an endless row of tests.

I am not without total experience in programing. I more or less understand 
program scripts when they are not too complicated and I like tweaking them, yet 
I cannot think up a new program from scratch.

But anyway, I will go ahead with your suggestions!

Thank you very much again!


> Op 30 jul. 2017, om 17:38 heeft Schmitz Thomas A. 
> <> het volgende geschreven:
>> On 30. Jul 2017, at 14:15, wrote:
>> Let me as a turcologist compare my problem to learning Kazakh: I am prepared 
>> to give you a manual with the grammatical rules, provide you with lists of 
>> nouns, verbs, adjectives and postpositions, explain the application of 
>> phonological rules, transliterations of the alphabet, give you a insight in 
>> the nominal cases and verb structure, and read with you a text in Kazakh. 
>> Nevertheless, without being rude, I bet that even then you are unable to 
>> flawlessly produce a poem or even a brief text in Kazakh yourself.
> OK, I see your desperation, and I take your analogy (I’m a scholar myself, 
> not a programmer): if someone came to you with the Iliad and explained that 
> he doesn’t know a word of Kazakh but wants all of Homer’s poem, every line, 
> every word, every nuance, expressed in Kazakh with the help of a grammar and 
> a dictionary, you’d reply that this is not how learning languages works. You 
> begin with simple sentences and work your way up. You have shown us several 
> times examples that don’t work, and I have expressed my suspicion that this 
> may be due to using the correspondence module. You weren’t sure whether you 
> need it or not; which is something only you can know. What does this module 
> offer that can’t be accomplished otherwise? If you look at the documentation 
> of the module, you see that the \startletter … \stopletter pair starts an 
> environment within a \starttext … \stoptext context document. When you look 
> at your setup, you will see that you have a \startletter … \stopletter, then 
> a few setups, and then a \starttext … \stoptext document. I’m not a 
> programmer, but I see that this will not work. 
> So for some simple rules: when you process an xml buffer (or document), you 
> define xmlsetups for the different xml elements. When you write 
> \xmlprocessbuffer, that’s when these elements will be processed - which 
> means: that’s when your document will be built. You can’t go through your xml 
> buffer/document and then add further text (well you can, but that’s more 
> complicated), so what you have to do is add your text (for the sake of this 
> example: \input knuth) WITHING THESE SETUPS. So let’s start with a simple 
> document that will work:
> \startbuffer[participants]
> <contacts>
>  <contact class='participant' label='Hendriks'>
>    <formalname>Hendriks</formalname>
>    <informalname>Karel</informalname>
>    <prefix>mr.</prefix>
>    <initials>K.</initials>
>    <city>Arnhem</city>
>    <address>
>      <p>Mr. K. Hendriks</p>
>      <p>Grotestraat 5</p>
>      <p>1234 BB Arnhem</p>
>    </address>
>    <kix>1234bb5</kix>
>  </contact>
>  <contact class='participant' label='Janssen'>
>    <formalname>Janssen</formalname>
>    <informalname>Piet</informalname>
>    <initials>P.</initials>
>    <prefix>mr.</prefix>
>    <city>Nijmegen</city>
>    <address>
>     <p>Mr. P. Janssen</p>
>     <p>Kortestraat 8</p>
>     <p>1234 AA Nijmegen</p>
>    </address>
>    <kix>1234aa8</kix>
>  </contact>
> </contacts>
> \stopbuffer
> \startxmlsetups xml:setups
> \xmlsetsetup{#1}{contacts|contact|formalname|informalname|prefix|initials|address|city|text|kix|p}{xml:*}
> \stopxmlsetups
> \xmlregistersetup{xml:setups}
> \startxmlsetups xml:contacts
>       \xmlflush{#1}
> \stopxmlsetups
> \startxmlsetups xml:p
>       \xmlflush{#1}\par
> \stopxmlsetups
> \startxmlsetups xml:contact
>       \xmltext{#1}{/address}
>       \blank [3*line]
>       Subject: your life in \xmltext{#1}{/city}
>       \blank [2*line]
>       Dear \xmltext{#1}{/prefix} \xmltext{#1}{/formalname},
>       \blank [line]
>       \input knuth \relax
>       Kind regards
>       \blank [line]
>       X
>       \page
> \stopxmlsetups
> \setuppagenumbering [state=stop]
> \starttext
> \xmlprocessbuffer{main}{participants}{}
> \stoptext
> So you see what I’m doing here: I process every simple <contact> element, and 
> I add all the stuff that will go into the letter for every single contact. 
> Start with this document and then find out what you need in addition: a logo, 
> some fancy lines across the letters, a special placement for the address and 
> the subject, etc.? I’m guessing that it would be easier to do this with 
> simple setup commands rather than using the correspondence module, but we 
> have no idea what you need to accomplish. Once you find out what’s missing, 
> you can modify the example and ask additional questions. But, to take your 
> analogy: don’t start with irregular verbs and special cases that will 
> complicate the picture. How is this line
> \setuplanguage[nl][date={year, –, mm, –, dd}] % ISO 8601 date
> from your original example relevant to your problem? And again: please don’t 
> give me the “I’m not a programmer” response; I’m not a programmer either, but 
> I know that you have to reduce the complexity in problems to find a solution. 
> You’re adding extra complexity.
> The way I describe above is the easiest path. There are other approaches, of 
> course: you can combine elements from several xml documents, or you can 
> process the xml data with Lua. All of this may be unnecessary in your case, 
> but nobody will be able to help unless we understand what you need. And to 
> explain this, you will have to start with simple examples, not with a complex 
> document.
> Sorry for being somewhat stern, but I’m sure you would give similar advice to 
> your students…
> All best
> Thomas
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