How to define xsi:type as an attribute in XML-schema?

Question

I have an XML for which I want to write a schema definition. The problem is that I don\'t know how to define xsi:type as an attribute. Here is the XML element:

Answer 1

The xsi:type attribute doesn't need to be declared in the schema: it's implicitly declared, and can be used on any element. But in an instance, it has to be a valid QName.

If you write

300.0

then

(a) to be namespace-well-formed, you need to declare the "xsi" namespace

(b) to be schema-valid, you also need to declare the "xs" namespace.

As Roberts indicated, this means you should write

300.0