Hello all --
XPath has an error function, https://www.w3.org/TR/xpath-functions-31/#func-error which stops processing, which isn't wanted when it's just a warning. ("this thing has problems; on to the next thing" shouldn't stop processing.)
XPath has a trace function, https://www.w3.org/TR/xpath-functions-31/#func-trace which emits text, but which I think is like xsl:message and will write to STDOUT rather than STDERR.
This leaves me thinking I've missed something -- how should I have a query give a warning? I'm not finding something BaseX specific; I'm fairly sure neither error() nor trace() are correct.
Any suggestions?
Thanks! Graydon
Hi Graydon,
In XQuery, there is no such thing as a warning function. If we included such a function in BaseX, we’d probably need to define rules for each API (GUI, clients, RESTXQ, others) how to return such warnings.
If you use BaseX on command-line, however, all output of fn:trace, prof:dump, etc. will be sent to STDERR, so maybe that’s already what you are looking for.
Cheers, Christian
On Thu, Mar 3, 2022 at 5:42 PM Graydon Saunders graydonish@gmail.com wrote:
Hello all --
XPath has an error function, https://www.w3.org/TR/xpath-functions-31/#func-error which stops processing, which isn't wanted when it's just a warning. ("this thing has problems; on to the next thing" shouldn't stop processing.)
XPath has a trace function, https://www.w3.org/TR/xpath-functions-31/#func-trace which emits text, but which I think is like xsl:message and will write to STDOUT rather than STDERR.
This leaves me thinking I've missed something -- how should I have a query give a warning? I'm not finding something BaseX specific; I'm fairly sure neither error() nor trace() are correct.
Any suggestions?
Thanks! Graydon
Hi Christian --
A definitive no means I can stop looking; thank you!
I think I will probably just put the warnings in the report being generated in what is maybe the more XML-appropriate way.
Much appreciated, Graydon
On Fri, Mar 4, 2022 at 4:57 AM Christian Grün christian.gruen@gmail.com wrote:
Hi Graydon,
In XQuery, there is no such thing as a warning function. If we included such a function in BaseX, we’d probably need to define rules for each API (GUI, clients, RESTXQ, others) how to return such warnings.
If you use BaseX on command-line, however, all output of fn:trace, prof:dump, etc. will be sent to STDERR, so maybe that’s already what you are looking for.
Cheers, Christian
On Thu, Mar 3, 2022 at 5:42 PM Graydon Saunders graydonish@gmail.com wrote:
Hello all --
XPath has an error function,
https://www.w3.org/TR/xpath-functions-31/#func-error which stops processing, which isn't wanted when it's just a warning. ("this thing has problems; on to the next thing" shouldn't stop processing.)
XPath has a trace function,
https://www.w3.org/TR/xpath-functions-31/#func-trace which emits text, but which I think is like xsl:message and will write to STDOUT rather than STDERR.
This leaves me thinking I've missed something -- how should I have a
query give a warning? I'm not finding something BaseX specific; I'm fairly sure neither error() nor trace() are correct.
Any suggestions?
Thanks! Graydon
basex-talk@mailman.uni-konstanz.de
-
Christian Grün -
Graydon Saunders