XSD: How to derive a simpletype both to add a attribute to it and to restrict the acceptable value of it

Question

for example To validate the following element:

 100 

The constraint I want on the text

Answer 1

Extending a simple type with attributes

Inspired by Petru Gardea's answer to XSD custom type with attribute and restriction, I have come up with a solution that should work for you. Your element must be a complexType extending the restricted simpleType with an attribute:

Extending multiple types with the same set of attributes

In addition, if you want to extend multiple types with the same set of attributes, you could use the xsd:attributeGroup as suggested in C. M. Sperberg-McQueen's answer to XSD: Adding attributes to strongly-typed “simple” elements:

This would validate the following xml element:

100