/usr/share/sip/PyQt5/QtXmlPatterns/ is in pyqt5-dev 5.7+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/sip/PyQt5/QtXmlPatterns/QtXmlPatternsmod.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qabstractmessagehandler.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qabstracturiresolver.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qabstractxmlnodemodel.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qabstractxmlreceiver.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qsimplexmlnodemodel.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qsourcelocation.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlformatter.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlname.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlnamepool.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlquery.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlresultitems.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlschema.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlschemavalidator.sip
/usr/share/sip/PyQt5/QtXmlPatterns/qxmlserializer.sip