Greetings, Stefan!
Thank you for your respond. I have added comments further.
On Wed, 15 Jan 2025 08:49:48 +0100
Stefan Behnel via lxml - The Python XML Toolkit <lxml@python.org> wrote:
> Schimon Jehudah via lxml - The Python XML Toolkit schrieb am 12.01.25
> um 08:53:
> > On Fri, 10 Jan 2025 17:28:00 +0100
> > jholg--- via lxml - The Python XML Toolkit <lxml@python.org> wrote:
> >
> >>
> >> >>> from lxml import etree
> >> >>> elem = etree.fromstring('<data/>')
> >> >>> tree = elem.getroottree()
> >> >>> tree.getroot().addprevious(etree.ProcessingInstruction('xml-stylesheet',
> >> >>> 'type="text/xml" href="whatever.xsl"'))
> >> >>> etree.tostring(tree)
> >> b'<?xml-stylesheet type="text/xml" href="whatever.xsl"?><data/>'
> >> >>>
> >
> > This is almost what I need.
> >
> > Sample
> > ------
> > <?xml version="1.0"?><feed
> > xmlns="http://www.w3.org/2005/Atom";></feed>
> >
> > Result
> > ------
> > >>> etree.tostring(tree)
> > b'<?xml-stylesheet type="text/xml" href="whatever.xsl"?><feed
> > xmlns="http://www.w3.org/2005/Atom";>\n</feed>'
> >
> > Node root is missing. XML is not valid.
>
> It is well-formed XML. The XML declaration ("<?xml …>") is not
> mandatory for UTF-8 encoded XML.
>
This is good to know. Thank you for sharing this insight.
> ("valid" means that it adheres to a schema. There is no XML
> validation involved here.)
>
>
> > Desired result
> > --------------
> > b'<?xml version="1.0"?><?xml-stylesheet type="text/xml"
> > href="whatever.xsl"?><feed
> > xmlns="http://www.w3.org/2005/Atom";>\n</feed>'
> >
> > Node stylesheet appears after node root.
> >
> > I suppose, that I would have to copy node root and concatenate it to
> > the, node stylesheet instruction.
>
> Just configure the output encoding explicitly or force the XML
> declaration to be written.
>
> https://lxml.de/tutorial.html#serialisation
>
I think that I already conduct serialisation, yet I want to refrain
from utilizing it.
https://git.xmpp-it.net/sch/Rivista/src/branch/main/rivista/xml/xslt.py#L15
I want an instruction, that is similar to the one which was offered by
Mr. Holger, which only appends a stylesheet line after the XML
declaration ("<?xml …>").
If it appears that I do not understand what am I stating, then please
correct me if I am wrong.
I am a lawyer, not an expert engineer.
Schimon
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