Email type

Does a type for e-mail exist in "xsd" datatypes?
If no is there any easyer way to define it comparing to the next definition:

<xsd:simpleType name="ZEmail">
	<xsd:restriction base="xsd:string">
		<xsd:pattern value=".+@.+[.]+.+"/>
	</xsd:restriction>
</xsd:simpleType>


RR