Element-Mandatory Attribute declaration in XSD Schema:

Question

I want to declare an element to be included in a complex type declaration, and the element has a mandatory attribute: \"option=MyOption\", but the value of the \"option\

Answer 1

1) This is a simple required string attribute

2) To require exactly one of a list of allowed values:

3) One can use a range as a restriction, like in the example below.

4) Below, the attribute is declared as a list containing decimal values. This allows an attribute to contain a subset of the specified values, e.g. Option="6 77 95".

5) Here the attribute is declared optional, but provided with a default value ("test"), which is sometimes sufficient: