As of CXF 2.6.2 (not sure about 2.6.1)), I get warnings for several types that have been imported from an XSD.
WARNING: C:\cxf-plugin-issue\src\main\resources\Private\Acquittal\NisseAcquittal_V1.wsdl [23,7]: src-resolve.4.2: Error resolving component 'meta:ApplHeaderStruct'. It was detected that 'meta:ApplHeaderStruct' is in namespace 'http://www.rsvz-inasti.fgov.be/PrivateWS/schema/MetaInfo/V1', but components from this namespace are not referenceable from schema document 'file:/C:/cxf-plugin-issue/src/main/resources/Private/Acquittal/NisseAcquittal_V1.wsdl#types1'. If this is the incorrect namespace, perhaps the prefix of 'meta:ApplHeaderStruct' needs to be changed. If this is the correct namespace, then an appropriate 'import' tag should be added to 'file:/C:/cxf-plugin-issue/src/main/resources/Private/Acquittal/NisseAcquittal_V1.wsdl#types1'.
I get none of these warning when using CXF 2.5.4, and the WSDL and XSD are all valid.
I'll attach a repro for this issue, and a log file (taken with level FINE).
Just search for "src-resolve.4.2".
Just use "mvn clean install" to reproduce the issue.