<?xml version="1.0" encoding="UTF-8"?>
<!--
This file is an entry point for Exchange (exch).
The DTS starting with this entry point includes the concepts defined in Exchange (exch) with their standard, period start, period end, total and axis default labels. It will not include references. It will not include presentation, calculation or definition linkbases.
-->
<xs:schema targetNamespace="http://xbrl.sec.gov/exch-std/2011-01-31" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:exch-std="http://xbrl.sec.gov/exch-std/2011-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink">
<xs:annotation>
<xs:appinfo>
<link:linkbaseRef xlink:type="simple" xlink:href="exch-lab-2011-01-31.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
</xs:appinfo>
</xs:annotation>
<xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
<xs:import namespace="http://xbrl.sec.gov/exch/2011-01-31" schemaLocation="exch-2011-01-31.xsd"/>
</xs:schema>