Re: [NTG-context] issue with lpath
> On 4 Aug 2022, at 18:39, Pablo Rodriguez via ntg-context > wrote: > > On 8/4/22 17:32, Taco Hoekwater via ntg-context wrote: >> [...] >> PS This sort of confusing filtering is why I do most of my xml >> processing from the lua end, where it is much clearer to me what is >> what. > Many thanks for clarifying the issue, Taco. > > BTW, according to the last slide from > https://meeting.contextgarden.net/2019/talks/02-xmlprocessing/02-xmlprocessing.pdf, > you had plans to document how to deal with XML in proper Lua. > > I wonder whether you are still interested in adding this information to > the manual. In theory, yes. In reality, life is too short, and it is on the bottom of an ever rising pile of things to do. :sadface Best wishes, Taco Taco Hoekwater E: t...@bittext.nl genderfluid (all pronouns) ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___
Re: [NTG-context] issue with lpath
On 8/4/22 17:32, Taco Hoekwater via ntg-context wrote: > [...] > PS This sort of confusing filtering is why I do most of my xml > processing from the lua end, where it is much clearer to me what is > what. Many thanks for clarifying the issue, Taco. BTW, according to the last slide from https://meeting.contextgarden.net/2019/talks/02-xmlprocessing/02-xmlprocessing.pdf, you had plans to document how to deal with XML in proper Lua. I wonder whether you are still interested in adding this information to the manual. Many thanks for your help, Pablo ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___
Re: [NTG-context] issue with lpath
> On 4 Aug 2022, at 16:07, Hans Hagen wrote:
>
> On 8/4/2022 12:22 PM, Taco Hoekwater via ntg-context wrote:
>>> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context
>>> wrote:
>>>
>>> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?
>> I was wondering about that as well, and I really had no clue how to do that.
>> Some
>> reading and studying later, I realised that there is a preceding-sibling::
>> axis.
>> That is not documented in xml-mkiv.pdf I think, but it inherited from xpath,
>> and that means this works:
>> \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}
>> “Take all blockquotes, then tests their immediate preceding siblings (index
>> [-1]) that are h3."
>> But the CSS version is nicer. Still, both solutions fail on generic input.
>> Sorry, out of clues
> \startbuffer[demo]
> ...
That puts the whole content inside the \section, and I don’t think that
was the intent. I understood that Pablo only wants the “h3” node.
In the original request, the CSS “{h3 + blockquote}” matches a “blockquote”
anyplace where it is immediately preceded by a “h3” (and nowhere else).
After that, some trickery was needed to try and get back to the actual “h3”.
My trick above with preceding-sibling above also gets the “h3” that is
immediately followed by a “blockquote”, but it got easily
confused if there were multiple “h3” or “blockquote” objects in the input.
Best wishes,
Taco
PS This sort of confusing filtering is why I do most of my xml processing from
the lua end, where it is much clearer to me what is what.
—
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Re: [NTG-context] issue with lpath
On 8/4/22 12:22, Taco Hoekwater via ntg-context wrote:
>> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context
>> wrote:
>> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?
>
> I was wondering about that as well, and I really had no clue how to
> do that. Some reading and studying later, I realised that there is a
> preceding-sibling:: axis.
>
> That is not documented in xml-mkiv.pdf I think, but it inherited
> from xpath, and that means this works:>
> \xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}
>
> “Take all blockquotes, then tests their immediate preceding siblings
> (index [-1]) that are h3."
Many thanks for your reply, Taco.
It isn’t documented, but I have just discovered that it is used inside a
function:
https://www.pragma-ade.com/general/manuals/xml-mkiv.pdf#search=sibling
> But the CSS version is nicer.
I agree. But using CSS for LPaths feels like cheating to me.
Many thanks for your help again,
Pablo
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Re: [NTG-context] issue with lpath
On 8/4/2022 12:22 PM, Taco Hoekwater via ntg-context wrote:
On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context
wrote:
BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?
I was wondering about that as well, and I really had no clue how to do that.
Some
reading and studying later, I realised that there is a preceding-sibling:: axis.
That is not documented in xml-mkiv.pdf I think, but it inherited from xpath,
and that means this works:
\xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}
“Take all blockquotes, then tests their immediate preceding siblings (index [-1])
that are h3."
But the CSS version is nicer. Still, both solutions fail on generic input.
Sorry, out of clues
\startbuffer[demo]
One
Standard paragraph
Quoted text
Two
Direct quote
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}
{xml|p|blockquote|div}
{xml:*}
\xmlsetsetup{#1}
{/xml/div[contains(@class,'level3')]}
{xml:section:level3}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:xml
\xmlall{#1}{/div}
\stopxmlsetups
\startxmlsetups xml:p
\startpar\xmlflush{#1}\stoppar
\stopxmlsetups
\startxmlsetups xml:blockquote
\startblockquote\xmlflush{#1}\stopblockquote
\stopxmlsetups
\startxmlsetups xml:section:level3
\xmldoif{#1}{/blockquote} {
\xmldoifnot{#1}{/p} {
\section{\xmlflush{#1}}
}
}
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
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Re: [NTG-context] issue with lpath
> On 3 Aug 2022, at 15:54, Pablo Rodriguez via ntg-context
> wrote:
>
> BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?
I was wondering about that as well, and I really had no clue how to do that.
Some
reading and studying later, I realised that there is a preceding-sibling::
axis.
That is not documented in xml-mkiv.pdf I think, but it inherited from xpath,
and that means this works:
\xmlsetsetup{#1}{blockquote/preceding-sibling::h3[-1]/} {xml:section}
“Take all blockquotes, then tests their immediate preceding siblings (index
[-1]) that are h3."
But the CSS version is nicer. Still, both solutions fail on generic input.
Sorry, out of clues
Best wishes,Taco
—
Taco Hoekwater E: t...@bittext.nl
genderfluid (all pronouns)
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Re: [NTG-context] issue with lpath
On 8/3/22 09:09, Taco Hoekwater via ntg-context wrote:
>> On 2 Aug 2022, at 21:14, Pablo Rodriguez via ntg-context
>> wrote:
>> [...]
>> I need an lpath to select the h3 node above, but only the one with "h3 +
>> blockquote" as a CSS selector (which could be added the lpath "../h3"
>> after).
>
> Lpath supports CSS selectors between curly braces as parts, so simply:
>
> \xmlsetsetup{#1}{{h3 + blockquote}/../h3} {xml:section}
Taco,
I knew that, but I wasn’t sure how to mix both. I’d say yesterday I
tried something similar to:
\xmlsetsetup{#1}{{h3 + blockquote}../h3} {xml:section}
Which, of course, couldn’t work.
> The xml-mkiv.pdf manual has lots of other lpath examples as well.
I know, I have read them many times. And I read them from time to time.
But I’m not smart enough to understand them.
BTW, is there any way to rephrase "{h3 + blockquote}" in proper Lua?
Something like "/h3/../!p/../blockquote" selected both "h3 + p" (which I
didn’t want and "h3 + blockquote" (the one intended).
Many thanks for your help,
Pablo
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Re: [NTG-context] issue with lpath
> On 2 Aug 2022, at 21:14, Pablo Rodriguez via ntg-context
> wrote:
>
> Dear list,
>
>
> I need an lpath to select the h3 node above, but only the one with "h3 +
> blockquote" as a CSS selector (which could be added the lpath "../h3"
> after).
Lpath supports CSS selectors between curly braces as parts, so simply:
\xmlsetsetup{#1}{{h3 + blockquote}/../h3} {xml:section}
should do. The xml-mkiv.pdf manual has lots of other lpath examples as well.
Best wishes,
Taco
—
Taco Hoekwater E: t...@bittext.nl
genderfluid (all pronouns)
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Re: [NTG-context] issue with lpath containing a hyphen
On 11/20/2016 8:47 PM, Pablo Rodriguez wrote: On 11/20/2016 12:13 PM, Hans Hagen wrote: On 11/18/2016 11:32 PM, Pablo Rodriguez wrote: [...] The only way to get the Knuth in the quote is to remove "\letterpercent" in the lpath. so why do you use the \letterpercent then It was a minimal sample taken from from a larger project. I have just discovered that the compilation error has nothing to do with the hyphen. Then I have the question about lpaths: do I have to remove all instances of \letterpercent? They seem to work fine, but I had the impression that \letterpercent was mandatory and now I don’t know whether it is allowed or simply forbidden. afaiks they are not needed unless you use lua function that use find or gsub - Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl - ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] issue with lpath containing a hyphen
On 11/20/2016 12:13 PM, Hans Hagen wrote: > On 11/18/2016 11:32 PM, Pablo Rodriguez wrote: >> [...] >> The only way to get the Knuth in the quote is to remove "\letterpercent" >> in the lpath. > > so why do you use the \letterpercent then It was a minimal sample taken from from a larger project. I have just discovered that the compilation error has nothing to do with the hyphen. Then I have the question about lpaths: do I have to remove all instances of \letterpercent? They seem to work fine, but I had the impression that \letterpercent was mandatory and now I don’t know whether it is allowed or simply forbidden. Many thanks for your help, Pablo -- http://www.ousia.tk ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] issue with lpath containing a hyphen
On 11/18/2016 11:32 PM, Pablo Rodriguez wrote:
Hans,
I have the following sample:
\startbuffer[demo]
is it working
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}{doc}{xml:*}
\xmlsetsetup{#1}
{div[@id='a\letterpercent-b']}
{xml:a:b}
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\startxmlsetups xml:doc
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:a:b
\input knuth
\stopxmlsetups
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
The only way to get the Knuth in the quote is to remove "\letterpercent"
in the lpath.
so why do you use the \letterpercent then
I guess I must be doing something wrong in this sample. In my real
document, I cannot simply remove it, I get an error.
As a general consideration, houw about making not mandatory to escape
characters in lpaths? This would ease the traslation from XML code to
lpaths.
Many thanks for your help,
Pablo
--
-
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