When validating a BPEL project that uses a complexType that resolves to simpleContent a validation error is produced.

Example:
ERROR: A combination of Message part and query should resolve to a simple data type. Expression: "/ns0:Prefix/ns0:id"

NetBeans IDE 6.1 (Build 200809100101) (GlassFishESB)
BPEL SE: 080919

The WSDL has validation properties defined as:

<vprop:property name="wzrd_prop_id_id" type="xsd:string"/>
    <vprop:propertyAlias propertyName="tns:wzrd_prop_id_id" messageType="ns:getHelloRequest" part="part1">
        <vprop:query>/ns0:UserData/ns0:id</vprop:query>
    </vprop:propertyAlias>
    <vprop:propertyAlias propertyName="tns:wzrd_prop_id_id" messageType="ns:setPrefixRequest" part="part1">
        <vprop:query>/ns0:Prefix/ns0:id</vprop:query>
    </vprop:propertyAlias>

The XSD definition for this data type is:

    <xsd:complexType name="TextType">
        <xsd:annotation>
            <xsd:documentation xml:lang="en">
                <ccts:Acronym>CCT</ccts:Acronym>
                <ccts:PrimaryRepresentationTerm>String</ccts:PrimaryRepresentationTerm>
            </xsd:documentation>
        </xsd:annotation>
        <xsd:simpleContent>
            <xsd:extension base="xsd:string">
                <xsd:attribute name="LanguageIdentifier" type="xsd:string" use="optional">
                    <xsd:annotation>
                        <xsd:documentation xml:lang="en">
                            <ccts:Acronym>SC</ccts:Acronym>
                            <ccts:Cardinality>0..1</ccts:Cardinality>
                        </xsd:documentation>
                    </xsd:annotation>
                </xsd:attribute>
                <xsd:attribute name="LanguageLocaleIdentifier" type="xsd:string" use="optional">
                    <xsd:annotation>
                        <xsd:documentation xml:lang="en">
                            <ccts:Acronym>SC</ccts:Acronym>
                            <ccts:Cardinality>0..1</ccts:Cardinality>
                        </xsd:documentation>
                    </xsd:annotation>
                </xsd:attribute>
            </xsd:extension>
        </xsd:simpleContent>
    </xsd:complexType>
    
    <xsd:element name="UserData">
        <xsd:complexType xmlns:xsd="http://www.w3.org/2001/XMLSchema">
            <xsd:sequence>
                <xsd:element name="data" type="xsd:string">
                </xsd:element>
                <xsd:element name="id" type="tns:TextType">
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="Prefix">
        <xsd:complexType xmlns:xsd="http://www.w3.org/2001/XMLSchema">
            <xsd:sequence>
                <xsd:element name="data" type="xsd:string">
                </xsd:element>
                <xsd:element name="id" type="tns:TextType">
                </xsd:element>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

BPEL Validation Rule:

[SA00045] Properties used in a <correlationSet> MUST be defined using XML Schema simple types. This restriction MUST 
be statically enforced. Each <correlationSet> is a named group of properties that, taken together, serve to identify a 
conversation. A given message can carry information that matches or initiates one or more correlation sets.

I believe this only applies to the property definition itself, and not the resulting query, when is does in fact 
resolve to an XML simple type.

The XSD definition pattern used here is taken from the standards such as UBL and OAGIS.  I've attached a version of 
UBL as an example.

Also attached is an example project, which is a rework of a correlation example from the NetBeans site.

When I modify the build.xml to remove the Validation check, and deploy to runtime.  The supplied example works 
correctly, implying that the runtime-engine has no problem with the construct.