[Interest] Handling XML Schemas in Qt without QXmlSchemaValidator

Yves Maurischat yves.maurischat at basyskom.com
Mon May 20 10:00:11 CEST 2019

Hi Jakob,

regarding the 'deprecated' state of XmlPatterns: There wont be an 
further development for this module, but I also doubt that it will be 
removed before Qt 6. So as long as you're using Qt 5 you're safe to use 
XmlPatterns. Qt 6 might be still 2 years away, and as you're using it 
professionally, I assume that you'll probably wait at least till the 
release of Qt 6.1 (or even longer) anyway before upgrading your project 
to it. Until then there might be another Qt (conforming) solution to the 

So in my opinion you've got 2 options (depending on the scope and 
lifecycle of your project):
a) use the Xml Schema related classes from the XmlPatterns module and 
worry about it going away (much) later, and maybe even have a Qt 
(conforming) solution by then, or
b) use an external library like CodeSynthesis XSD or something similar 
and worry about their API changes and usage and naming patterns that 
differ from Qt's patterns etc.

IMHO using the Qt modules while they are still available is usually the 
better option.

Mit freundlichen Grüßen | Kind regards,

*Yves Maurischat*
Senior Software Engineer

basysKom GmbH
Robert-Bosch-Str. 7 | 64293 Darmstadt | Germany
Tel: +49 6151 870 589 0| Fax: -199
yves.maurischat at basyskom.com | www.basyskom.com

Handelsregister: Darmstadt HRB 9352
Geschaeftsfuehrung: Heike Ziegler

Am 16.05.2019 um 09:31 schrieb Jakob Lettenbichler:
> Hiho,
> This is my first mail to the mailing list, so please be gentle with me…
> We are using QXmlStreamReader and –writer for handling our xml files 
> (QDom seems to be dead, if I interpret the lines in the documentation 
> correctly: https://doc.qt.io/qt-5/qtxml-index.html ).
> Qt seems to have a nice bunch of classes for Xml Schemas in the Xml 
> patterns module (https://doc.qt.io/qt-5/qtxmlpatterns-index.html ) but 
> using them seems to be dangerous, since the release notes mark them as 
> deprecated: (https://wiki.qt.io/New_Features_in_Qt_5.13)
> I do not find any comparable class in the Qt documentation, therefore 
> I would like to ask the professionals here, how to work with Xml 
> Schemas in Qt without that module.
> Many thanks in advance for helping me out,
> Cheers,
> Jakob
> P.S.: My colleague has asked a similar question in the forum 
> (https://forum.qt.io/topic/102834/proper-successor-for-qxmlschemavalidator 
> ), but they sent us here. So please don’t send us back…
> ----------------------------------------
> Dr. Jakob Lettenbichler
> A&R TECH GMBH                  ...we make it move...
> Marksteinergasse 13, 1210 Vienna, Austria
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> mailto:jakob.lettenbichler at artech.athttp://www.artech.at 
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