XML Tutorial/XML Schema/include
<include> Declarations
<source lang="xml">
<include schemaLocation="">
The <include> declaration combines XML Schemas that are designed for the same targetNamespace(or no targetNamespace). Within the <include> declaration there is no namespace attribute. The <include> declaration can be used only on documents with the same targetNamespace, or no targetNamespace. When a schema validator encounters an <include> declaration, it treats the global declarations from the included XML Schema as
if they had been declared in the XML Schema that contains the <include> declaration.</source>