Ignoring Elements in XSD

[Jody Greening]

How do I write a schema that is only validating elements: 1,4,7,8,9 and
ignores every other element? I also need to not to care about the order
of the elements or how many are in between elements that I am trying to
validate.

XML:
<root>
<element1 />
<element2 />
<element3 />
<element4 />
<element5 />
<element6 />
<element7 />
<element8 />
<element9 />
</root>

XSD:
<xs:element name="root">
<xs:complexType>
<xs:sequence>
<xs:element name="element1">
<xs:element name="element4">
<xs:element name="element7">
<xs:element name="element8">
<xs:element name="element9">
</xs:sequence>
</xs:complexType>
</xs:element>

Basically I need it to ignore ANY elements outside of my Schema
declaration and I may not know where they are located in the XML doc.

Thanks.
Jody