Re: [xsl] how to make a log file in XSLT?

["Martin Honnen martin.honnen@xxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

On 3/12/2023 9:11 PM, Jean-Luc Chevillard jeanluc.chevillard@xxxxxxxxx
wrote:
> Dear list members,
>
> I have been wondering for a long time whether there was a method for
> automatically recording some elements of information every time I run
> a given script.
>
> As a minimum example, I would start with an empty file
> +++++++++++++++
> <?xml version="1.0" encoding="UTF-8"?>
> <log>
> </log>
> +++++++++++++++++++++++
>
> After running the script once, the file would become
> +++++++++++++++
> <?xml version="1.0" encoding="UTF-8"?>
> <log>
>     <entry>[2023-03-12 (19:53)]</entry>
> </log>
> +++++++++++++++++++++++
>
> After running the script a second time, one hour later, the file would
become
> +++++++++++++++
> <?xml version="1.0" encoding="UTF-8"?>
> <log>
>     <entry>[2023-03-12 (20:53)]</entry>
>    <entry>[2023-03-12 (19:53)]</entry>
> </log>
> +++++++++++++++++++++++
>
> I have just tried doing this by applying the script at the bottom of
> this message (in which "copy.xslt" is the identity transform) to a
> base file, but as I expected, I obtained an error message stating:
>
> System ID: C:\JLC\XML_tests\cEnAvaraiyam\log_book_experiment.xslt
> Scenario: 4a_log_experiment
> XML file: C:\JLC\XML_tests\cEnAvaraiyam\cEnA_MSS_rectangles_chart.xml
> XSL file: C:\JLC\XML_tests\cEnAvaraiyam\log_book_experiment.xslt
> Engine name: Saxon-PE 11.4
> Severity: fatal
> Problem ID: XTRE1500
> Description: Cannot read a document that was written during the same
> transformation:
> file:/C:/JLC/XML_tests/cEnAvaraiyam/experimental_log_book.xml
> Start location: 17:63
> Length: 1
> URL: http://www.w3.org/TR/xslt20/#err-XTRE1500
>
> Is there a method for obtaining the desired result by using XSLT?
In some context I think you can fool Saxon by using different URIs e.g.
append some query string to the input URI


<xsl:variable name="current_log_content" select="document($Log_file_name ||
'?foo=bar')"/>

but I have not tried that now.