1. XML Namespaces Each schema file associated with a URL to uniquely identify where elements come from – Like packages in Java http://www.ebay.comhttp://www.amazon.com http://www.superstore.ca

2. TargetNamesapce So, if I’m writing a schema for my superstore <schema... targetNamespace=“http://www.superstore.com” >

3. Label prefixes Instead of referring to URLs, namespaces are given short prefix labels <schema... targetNamespace=“http://www.superstore.ca” xmlns:ebay=http://www.ebay.comhttp://www.ebay.com >

4. Referring to XML Schema schema XML Schema is an XML language itself with a schema. <xs:schema targetNamespace=“http://www.superstore.ca” xmlns:ebay=http://www.ebay.com” xmlns:xs=“http://www.w3.org/2001/XMLSchema” >

5. Default Namespace One namespace can be given no label, for convenience <schema... targetNamespace=“http://www.superstore.ca” xmlns:ebay=http://www.ebay.com” xmlns=“http://www.w3.org/2001/XMLSchema” >

6. Declarations Prefixes are not used when declaring names of elements or types Prefixes are used when referring to elements or types <schema... targetNamespace=“http://www.superstore.ca” xmlns:ebay=http://www.ebay.com” xmlns=“http://www.w3.org/2001/XMLSchema” >