﻿<?xml version="1.0" encoding="utf-8"?>
<!-- Taxonomy based on XBRL standard v.2.  Created by UBmatrix Taxonomy Builder 5.0.80.  Contact www.ubmatrix.com -->
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xbrli="http://www.xbrl.org/2001/instance" xmlns:link="http://www.xbrl.org/2001/XLink/xbrllinkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:int-ar="http://www.xbrl.org/taxonomy/int/br/rpt/ar/2002-10-15" targetNamespace="http://www.xbrl.org/taxonomy/int/br/rpt/ar/2002-10-15" elementFormDefault="qualified">
  <annotation>
    <appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="int-ar-2002-10-15-labels.xml" xlink:actuate="onRequest" xlink:role="http://www.xbrl.org/linkprops/linkRef/label" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="int-ar-2002-10-15-references.xml" xlink:actuate="onRequest" xlink:role="http://www.xbrl.org/linkprops/linkRef/reference" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="int-ar-2002-10-15-presentation.xml" xlink:actuate="onRequest" xlink:role="http://www.xbrl.org/linkprops/linkRef/presentation" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="int-ar-2002-10-15-calculation.xml" xlink:actuate="onRequest" xlink:role="http://www.xbrl.org/linkprops/linkRef/calculation" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="int-ar-2002-10-15-definition.xml" xlink:actuate="onRequest" xlink:role="http://www.xbrl.org/linkprops/linkRef/definition" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2001/instance" schemaLocation="http://www.xbrl.org/2001/xbrl-instance.xsd" />
  <element id="int-ar_ZIPPostalCode" name="ZIPPostalCode" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>ZIP or other postal code of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_TitleReport" name="TitleReport" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Title which appears on the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_Street2" name="Street2" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Street address line 2 of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_Street1" name="Street1" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Street address line 1 of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_StateProvince" name="StateProvince" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>State or province of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_StatementStockholdersEquityPeriod" name="StatementStockholdersEquityPeriod" type="xbrli:periodType" substitutionGroup="xbrli:item" />
  <element id="int-ar_StatementsCovered" name="StatementsCovered" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Section which describes the statements covered by the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_StatementComprehensiveIncomePeriod" name="StatementComprehensiveIncomePeriod" type="xbrli:periodType" substitutionGroup="xbrli:item" />
  <element id="int-ar_ScopeParagraph" name="ScopeParagraph" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Scope paragraph issued by the independent accountant/accounting firm.</documentation>
    </annotation>
  </element>
  <element id="int-ar_ReportType" name="ReportType" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Type of independent Accountants Report issued.  Examples are audit, review, or compilation.</documentation>
    </annotation>
  </element>
  <element id="int-ar_ReportingMethod" name="ReportingMethod" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Reporting method used to prepare financial statements covered by the Accountants Report:  GAAP, Cash, Modified Cash, Tax or OCBOA</documentation>
    </annotation>
  </element>
  <element id="int-ar_ReportInformation" name="ReportInformation" abstract="true">
    <annotation>
      <documentation>Information contained in and which describes the specific Accountants Report issued.</documentation>
    </annotation>
  </element>
  <element id="int-ar_ReportDate" name="ReportDate" type="xbrli:dateTimeItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Report issue date of the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_ReportBody" name="ReportBody" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Section which contains the paragraphs which make up the body of the Accountants Report.  This tag is to be used when the entire Accountants Report is to be listed together (i.e. not broken out by paragraph).</documentation>
    </annotation>
  </element>
  <element id="int-ar_OpinionParagraph" name="OpinionParagraph" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Opinion paragraph issued by the independent accountant/accounting firm.</documentation>
    </annotation>
  </element>
  <element id="int-ar_IntroductoryParagraph" name="IntroductoryParagraph" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Introductory paragraph issued by the independent accountant/accounting firm.</documentation>
    </annotation>
  </element>
  <element id="int-ar_IncomeStatementPeriod" name="IncomeStatementPeriod" type="xbrli:periodType" substitutionGroup="xbrli:item" />
  <element id="int-ar_ExplanatoryParagraph" name="ExplanatoryParagraph" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Explanatory paragraph issued by the independent accountant/accounting firm.</documentation>
    </annotation>
  </element>
  <element id="int-ar_DualDateNote" name="DualDateNote" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Explanatory text of dual date.</documentation>
    </annotation>
  </element>
  <element id="int-ar_DualDate" name="DualDate" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Section which contains information relating to a dual date which was issued, if any.</documentation>
    </annotation>
  </element>
  <element id="int-ar_DateDualDate" name="DateDualDate" type="xbrli:dateTimeItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Date of the dual date.</documentation>
    </annotation>
  </element>
  <element id="int-ar_Country" name="Country" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Country or region of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_City" name="City" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>City of the independent accountant/accounting firm issuing the report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_CashFlowsStatementPeriod" name="CashFlowsStatementPeriod" type="xbrli:periodType" substitutionGroup="xbrli:item" />
  <element id="int-ar_BalanceSheetDate" name="BalanceSheetDate" type="xbrli:dateTimeItemType" substitutionGroup="xbrli:item" />
  <element id="int-ar_Addressee" name="Addressee" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Addressee of the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountingStandardsApplied" name="AccountingStandardsApplied" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Accounting standards applied in preparing the financial statements covered by the Accountants Report:  US GAAP, Canadian GAAP, etc.</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountantsReport" name="AccountantsReport" abstract="true">
    <annotation>
      <documentation>Report(s) issued by independent accountant or internal accountant.  If two reports are issued, two accountant report sections should appear</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountantsInformationSignature" name="AccountantsInformationSignature" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Signature of the independent accountant/accounting firm.  Currently, this tag would primarily use the /s/ identifier to denote signature and then include the independent accountant's/accounting firm's name.  In the future this might contain either a GIF image of a signature/digital signature or a URL to specific signature information.</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountantsInformationName" name="AccountantsInformationName" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Name of the independent accountant/accounting firm who issued the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountantsInformationAddress" name="AccountantsInformationAddress" type="xbrli:stringItemType" substitutionGroup="xbrli:item">
    <annotation>
      <documentation>Section which contains the independent accountant/accounting firm's address information.</documentation>
    </annotation>
  </element>
  <element id="int-ar_AccountantsInformation" name="AccountantsInformation" abstract="true">
    <annotation>
      <documentation>Information which describes the independent accountant/accounting firm who prepared the Accountants Report.</documentation>
    </annotation>
  </element>
  <element id="int-ar_Name" name="Name" type="string" substitutionGroup="link:part" />
  <element id="int-ar_Number" name="Number" type="string" substitutionGroup="link:part" />
  <element id="int-ar_Chapter" name="Chapter" type="string" substitutionGroup="link:part" />
  <element id="int-ar_Paragraph" name="Paragraph" type="string" substitutionGroup="link:part" />
  <element id="int-ar_Subparagraph" name="Subparagraph" type="string" substitutionGroup="link:part" />
</schema>
