<xsd:any namespace='a namespace | ##targetNamespace | 
			##any | ##local | ##other' 
	processContents='skip | lax | strict'/>

<xsd:anyAttribute namespace='...'/>

length, minLength, maxLength

totalDigits
fractionDigits

prohibited

<xsd:include schemaLocation='http://...' />

<xsd:redefine schemaLocation='http://...'/>

elementFormDefault='qualified' for local elements only
attributeFormDefault='qualified' for local attributes only
form='qualified'
blockDefault='#all'


global definition and ref=''

multiple local definitions of element with same name and different types