Applying enumeration-facet on list type

Hi,

 

When defining an enumeration-facet on a list, should we consider the
lexical-space or value-space of the value? 

Is the following example legal?

 

Instance: 

<root MyAtt="1.0 2.0"/> 

 

Schema:

<?xml version="1.0" ?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

            <xsd:element name="root">

                <xsd:complexType>

                        <xsd:attribute name="MyAtt">

                                    <xsd:simpleType>

                                    <xsd:restriction>

                                                <xsd:simpleType>

                                                   <xsd:list
itemType="xsd:decimal" />

                                                </xsd:simpleType>

                                    <xsd:enumeration value='1.0 2'/> 

                                    </xsd:restriction>

                                    </xsd:simpleType>

                        </xsd:attribute>

                </xsd:complexType>

            </xsd:element>

</xsd:schema>