XSD: How to validate the XML file according to value of some tag?

Question

I was trying to validate this XML file ... where if

1. is \"Y\" then must appear

2. if

Answer 1

Unfortunately this problem cannot be fixed using XSD. The reason is that XSD can only be used to define the structure (syntax) of XML-Files. What you would like to do is to couple the syntax to some semantic properties (some TAG must have a certain content to decide on the syntax of some TAGS nearby).