Enumeration facet - List Datatype

Hi,
I am confused about enumeration facet on list datatype.

Which case is correct?
(1) The enumeration is a constraint on the list 
OR 
(2) The enumeration is constraint on elements of the list.


For example, lets say I have the following schema:
<?xml version="1.0" encoding="UTF-8"?>
<schema>
<element name ="myInt" type="myType"/>
<simpleType name="myList">  
	<list itemType="integer"/>
</simpleType>

<simpleType name="myType">
 <restriction base="myList">
    <enumeration value="1"/>
    <enumeration value="2"/>
  </restriction>
</simpleType>
</schema>   

In the corresponding, xml document:

<myInt>1 2</myInt>

would it be Valid or Invalid?


Thank you,
Elena