Mixed content and empty content

Hello,
 
What is the semantics of the following XSDL snippet?
 

	<xsd:element name="foo">
	    <xsd:complexType mixed="true"/>
	</xsd:element>

 
Does it mean the same as 
 

	<xsd:element name="foo">
	    <xsd:complexType/>
	</xsd:element>

 
that is, that element foo cannot have any content (be it textual or
element children)?
 
If not, is the meaning <xsd:complexType mixed="false"/> the same as
<xsd:complexType/> ?
 
Thanks.
 
Shlomo