Questio on Prefix before parameter

 I have received this example:

<xsd:schema xsd:targetNamespace="http://www.somewhere.org/Book" 
xmlns:local="http://www.somewhere.org/Book" 
xmlns:xsd="http://www.w3.org/1999/XMLSchema" >

<element name="Book" xsd:type="local:BookType" />

<complexType name="BookType">
<element name="Title" xsd:type="string" />
...
</complexType>
</xsd:schema>

The prefix "xsd" that occur in the expressions :xsd:targetNamespace or 
xsd:type can occur before other parameters, for example name,minoccurs, 
maxoccurs,nullable and etc. ?