Re: [NTG-context] processing xml in mkiv

16 Mar 2008

      On Mar 16, 2008, at 12:04 PM, Wolfgang Schuster wrote:
...
On Sun, 16 Mar 2008 11:29:49 +0100
"Thomas A. Schmitz"  wrote:
...
Hi all,
xml processing is about the last part of my ConTeXt stuff where I
haven't been able to switch to mkiv; I just can't get my head around
it... 2 questions:
1. When I try to process a xml-file with my old (mkii) environments,
the output looks OK, but I always get a first page with the xml
version declaration
<?xml version="1.0" encoding="utf-8"?>
Is this a bug or a feature? Is there anything I can do to prevent it?
Can you post a example, I never saw such a effect in my test files.
Hi Wolfgang,

OK, here is a minimal example:

file test.xml:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE test [
<!ELEMENT document   (section)>
<!ELEMENT section    (#PCDATA)>
]>

<document>
   <section title="First">
     <p>This is <quotation>an</quotation> xml file.</p>
   </section>
</document>

file testenvironment.tex

\usemodule[xtag-ent]

\defineXMLenvironment[document]
                      {\starttext}
                      {\stoptext}

\defineXMLenvironment[section]
  {\section{\XMLpar{section}{title}{}}}
  {}

\defineXMLenvironment[quotation]
                      {\quotation\bgroup}
                      {\egroup}

When I process with mkii, I get the expected output. Processing with

texexec --lua --env=testenvironment test.xml

gives me the first line (here it's not an entire page) I described!
...
...
2. I'm really lost with the new xml mechanism. My first problem: In a
message from September last year, Hans explained that the command to
process xml files is:
...
The regular definitions still work but processing a file is done
differently:
\xmlprocess{id}{filename}{optional initialization setup}
I used to have environments with which to typeset a bunch of files.
How can  this be ported to the new mechanism, which appears to expect
a filename?
\xmlprocess{main}{filename.xml}{} works for me.
I tried to translate this into the "new" mechanism and thought it  
should read like so:

\startxmlsetups xml:mysetups
\xmlsetsetup{\xmldocument}{text:p|section|quotation}{xml:*}
\stopxmlsetups

\xmlregistersetup{xml:mysetups}

\startxmlsetups xml:p
\xmlflush{#1}\endgraf
\stopxmlsetups

\startxmlsetups xml:quotation
\quotation{\xmlflush{#1}}
\stopxmlsetups

\startxmlsetups xml:section
\section{\xmlatt{#1}{section}{title}}
\stopxmlsetups

\starttext
\xmlprocess{main}{test.xml}{}
\stoptext

But then, I only get "invalid xml file" in the output.
...
...
Sorry if these are very basic problems, but I'm probably a bit obtuse
here.
You don't have to use new xml mechanism form MkIV, the old code could
be used without problems. The advantage of the new code is direct
access to elements in the tree (you could use xml files as database)
and the option to read from zip files.
Wolfgang
OK, I'll keep that in mind. Thanks for your help, Wolfgang!

Thomas