﻿<?xml version="1.0" encoding="utf-8"?>
<!--
Taxonomy based on XBRL standard Version 2.1.
Created by UBmatrix Taxonomy Designer 2.5.2641.2110 (2006-11-29 17:31).  
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Produced on 2007-01-15 07:24:47
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<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ci="http://www.xbrl.us/patterns/2007/ExtensibleEnumeration" targetNamespace="http://www.xbrl.us/patterns/2007/ExtensibleEnumeration" elementFormDefault="qualified" attributeFormDefault="unqualified">
  <annotation>
    <appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="ExtensibleEnumeration-label.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="ExtensibleEnumeration-presentation.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links, all" />
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <complexType name="RelatedPartyTransactionTypeCodeItemType">
    <simpleContent>
      <restriction base="xbrli:stringItemType">
        <minLength value="0" />
        <maxLength value="50" />
      </restriction>
    </simpleContent>
  </complexType>
  <element id="ci_DisclosureRelatedPartyTransactionsAbstract" name="DisclosureRelatedPartyTransactionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="true" nillable="true" />
  <element id="ci_RelatedPartyTransaction" name="RelatedPartyTransaction" substitutionGroup="xbrli:tuple" nillable="true">
    <complexType>
      <complexContent>
        <restriction base="anyType">
          <sequence>
            <element ref="ci:RelatedPartyTransactionNameParty" minOccurs="1" maxOccurs="1" />
            <element ref="ci:RelatedPartyTransactionNatureRelationshipWithParty" minOccurs="1" maxOccurs="1" />
            <element ref="ci:RelatedPartyTransactionType" minOccurs="0" maxOccurs="1" />
            <element ref="ci:RelatedPartyTransactionAmount" minOccurs="0" maxOccurs="1" />
          </sequence>
          <attribute name="id" type="ID" use="optional" />
        </restriction>
      </complexContent>
    </complexType>
  </element>
  <element id="ci_RelatedPartyTransactionAmount" name="RelatedPartyTransactionAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" />
  <element id="ci_RelatedPartyTransactionNameParty" name="RelatedPartyTransactionNameParty" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" />
  <element id="ci_RelatedPartyTransactionNatureRelationshipWithParty" name="RelatedPartyTransactionNatureRelationshipWithParty" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" />
  <element id="ci_RelatedPartyTransactionType" name="RelatedPartyTransactionType" substitutionGroup="xbrli:tuple" nillable="true">
    <complexType>
      <complexContent>
        <restriction base="anyType">
          <sequence>
            <element ref="ci:RelatedPartyTransactionTypeCodeItemHead" minOccurs="1" maxOccurs="1" />
          </sequence>
          <attribute name="id" type="ID" use="optional" />
        </restriction>
      </complexContent>
    </complexType>
  </element>
  <element id="ci_RelatedPartyTransactionTypeCodeItemHead" name="RelatedPartyTransactionTypeCodeItemHead" type="ci:RelatedPartyTransactionTypeCodeItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="true" />
  <element id="ci_ScheduleRelatedPartyTransactions" name="ScheduleRelatedPartyTransactions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" />
</schema>
