I have created a XML schema and a sample XML document. According to XMLSpy 4.4 the document seems to be valid and XML schema compliant to the W3C Specification.
All other Tools (Topologi Schematron and Markup Editor, XML Schema Validator from Microsoft) that I used for validation reply that my schema is not deterministic. They report that there are multiple definitions of some element that cause content model to be ambiguous.
I woud like to know, whether I make mistakes in schema definition and XMLSpy doesn't notice them, or these are bugs of the other tools.
Here is a part of my schema that causes difficulties: