On 9/4/2013 7:55 PM, Thangalin wrote:
Hi.
of course we could alternatively export all as <div
class="tag-subtag-..."> but i don't like that too much; html itself
is not rich enough for our purpose
What about giving developers the ability to change the destination
element? For example:
\setuplist[chapter][
xml={\starttag[h1]#1\stoptag}
]
Would produce, upon export:
<h1>Chapter</h1>
export doesn't happen at that level; something like that would add an
ugly overhead; it's way easier to make some xslt script that converts
the rather systematic export to something like that and it only has to
be written once by someone (not me)
Or (using "export" instead of "xml"; I don't care what it is named):
\setuplist[chapter][
export={\starttag[div]\startattribute[class]{chapter}#1\stopattribute\stoptag}}
]
Similarly, this would produce:
<div class="chapter">Chapter</div>
you use some tex syntax but it all happens in lua; also, the only way to
provide some kind of different tagging is to support plugins (read: lua
functions) that could override default behaviour (but again, it's quite
easy to do that as a postprocessing step)
This would offer the flexibility of custom XML documents without
affecting the default behaviour.
* Generates XHTML headers (including <!DOCTYPE and <html...>)
not needed as we're 'standalone'
Having the ability to produce the <!DOCTYPE...> and <htmnl> elements
could be as simple as:
\setupexport[
standalone=no,
]
* Produces images as img tags, rather than float tags.
the css can deal with them (info is written to files for that)
Yes, but they aren't standard. There is an ecosystem of tools (e.g.,
Calibre, normalizing CSS templates, etc.), not to mention a widespread
knowledge-base, that groks the minimal XHTML specification. Plus, using
XML tags that are not in the minimal XHTML spec. means more testing on
more devices to make sure that their XHTML parsers render correctly.
most of the xml we get here is a funny mix of whatever tags and html
(often for tables) and normaly there is way more structure than in the
average html document; the export is meant to be close to the source and
turning it into some html / div mixture makes it messy
for instance, we have more levels than H1..H6, so how to do H7? if
someone has to deal with that, he/she can as well transform all into H1
with some class which is a local solution then
xhtml has no typical tags .. it's xml + css (or xslt) ...
unfortunately browsers have
That is, a Strictly Conforming XHTML Document, as per:
http://www.w3.org/TR/2000/REC-xhtml1-20000126/#docconf
the export of context is in fact just xml, and by tagging it as
xhtml we can apply css to it; but if someone has a workflow for
producing epub an option if to postprocess that xml file into
whatever epub one wants
indeed. that was the idea: export xml, tag it as xhtml (with the option
to provide hyperlinks, an exception), provide some standard css as
starter and then let users deal with matters the way they like; you can
be pretty sure that what you want is not the same as what someone else
wants; and if more people want it, they can together write a
transformation script (or hire someone)
keep in mind that the export itself is already tricky enough and for me
it doesn't pay off to provide tons of additional functionality (well, it
doesn't pay of to export anyway)
I could transform the ConTeXt-generated XML into strictly conforming
XHTML, but it was a step I was hoping to avoid. Right now my process is:
1. Convert XML data to a ConTeXt .tex file.
2. Convert ConTeXt to either PDF or EPUB.
3. Stylize EPUB using CSS.
but writing the transform that suits you is just one step (with yuou
spending the time on it) while extending the export into a complete
transformation and configuration thing would put the burden on me -)
I want to use ConTeXt here (instead of going directly from XML data to
EPUB) because ConTeXt provides functionality such as multiple indexes,
table-of-contents, and bundling the .epub. Having an extra step to
generate strictly conforming XHTML is architecturally painful as it
means transforming the document three times (XML -> ConTeXt, ConTeXt ->
XML, then XML -> XHTML).
why is it painful? the export if quite generic and will not change; it
is also flexible as it honors user defined sectioning and styling
Everytime we look into epub there's another issue ... it's not a
standard but reversed engineered application mess (happen soften
with xml: turn some application data structures into xml and call it
a standard)
Some book vendors only accept validating EPUBs. ConTeXt is documented as
being able to generate EPUBs. The documentation should state the EPUBs
do not validate and do not generate strictly conforming XHTML.
well, i, luigi and some others did tests: the thing is that epub is
evolving and we had quite some conflicting validations (and specs) and
we try as good as possible to adapt
so you need to be more precise in "doesn't validate": it's proper xml
and therefore proper xhtml (and nothing says that there should be html
tags)
I have spent the last three weeks converting documents from LaTeX to
ConTeXt because the documentation stated that ConTeXt can produce EPUBs.
While true, the documentation did not mention its shortcomings. Had I
known in advance, I probably would have gone straight to EPUB using Java
or, with a little revulsion, PHP classes. ;-) That said, I probably
should have tested this feature sooner. :-)
the export is a reconstruction of the input, and the more structure the
better; if you really need a multiple out put format, you should use xml
as source and then use context fo rpdf creation and xslt for html creation
i really see no problem with a transformation from the generic export to
some epub (whatever variant your whatever device supports) ... really:
you cannot expect me to provide an extensive configurable export system
(for only one user) that will never suit all users so ... also,
configuring it for some document is probably as much work as writing an
xslt transformation
as i have no real use/demand for epub it's not something i look into
on a daily basis
How can I help resolve these issues?
Merely "testing" (which I am happy to do) isn't going to produce a
strictly conforming XHTML document.
indeed it isn't producing an html document (with properly matched tags)
but i'm not convinced that it isn't xhtml
Hans
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