This type contains only simple contents (text and attributes), therefore we add simpleContent element around the content. When using simple contents, you must define an extension OR a restriction within the simpleContent element, like this:

Look at the FLWOR expressions which is given below:

Tip: Use the extension/restriction element to limit or to expand the base simple type for the element.

Here is an example of an XML element, "shoesize", that contains only text:

The following example declare a complexType, "shoesize". The contents are defined as an integer value, and the "shoesize" element also contains an attribute named "country":

We could also give the complexType element as a name, and let the "shoesize" element have a type attribute that refers to the name of the complexType (if you use this method, several elements can refer to the same complex type):