Can I register xsd with namespace then validate xml ignoring namespace

The XSD's that we register (which does not contain namespaces) are obtained from an identical XSD that contains a namespace (by deleting the namespace) The XSD's with namespaces are required since its used in WSDL files. This leads duplication of XSD's i.e we need to maintain 2 sets of XSD's (one with and one without namespace).

Will Oracle allow us to register an XSD that has a namespace with the command (register schema command) and then validate instance XML by ignoring the namespace?

XSD without namespace:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://ift.tt/tphNwY">
<!-- Element Declarations -->
            <xs:element name="S_NO" type="S_NOType">
                            <xs:annotation>
                                        <xs:documentation>S_Number</xs:documentation>
                            </xs:annotation>
            </xs:element>

XSD with namespace:

<xs:schema xmlns:xs="http://ift.tt/tphNwY"     xmlns="http://ift.tt/XOBFkr"
     targetNamespace="http://ift.tt/XOBFkr">
<!-- Element Declarations -->
            <xs:element name="S_NO" type="S_NOType">
                            <xs:annotation>
                                            <xs:documentation>S_Number</xs:documentation>
                            </xs:annotation>
            </xs:element>