Specify local XSD schema in XML file - eclipse

Question

I need to validate an XML file and using eclipse to do it. I've added the XML file and all XSD file to a project:
I've added a reference to the XSD file:
<?xml version="1.0" encoding="UTF-8"?>
<S2SDDDnf:MPEDDDnfBlkDirDeb xmlns = "MPEDDDnfBlkDirDeb.xsd">
<S2SDDDnf:SndgInst>stuff</S2SDDDnf:SndgInst>
<S2SDDDnf:RcvgInst>stuff</S2SDDDnf:RcvgInst>
<S2SDDDnf:SrvcId>COR</S2SDDDnf:SrvcId>
<S2SDDDnf:TstCode>T</S2SDDDnf:TstCode>
<S2SDDDnf:FType>DNF</S2SDDDnf:FType>
<S2SDDDnf:FileRef>DNFMJMD%R5%LXXX</S2SDDDnf:FileRef>
<S2SDDDnf:FileBusDt>2013-10-18</S2SDDDnf:FileBusDt>
<S2SDDDnf:RoutingInd>ALL</S2SDDDnf:RoutingInd>
<S2SDDDnf:FileCycleNo>01</S2SDDDnf:FileCycleNo>
<S2SDDDnf:NumDDBlk>1</S2SDDDnf:NumDDBlk>
<S2SDDDnf:NumPCRBlk>0</S2SDDDnf:NumPCRBlk>
<S2SDDDnf:NumREJBlk>0</S2SDDDnf:NumREJBlk>
<S2SDDDnf:FIToFICstmrDrctDbt xmlns="urn:iso:std:iso:20022:tech:xsd:pacs.003.001.02"
xmlns:S2SDDDnf="urn:S2SDDDnf:xsd:$MPEDDDnfBlkDirDeb">
<GrpHdr>
<MsgId>DNF.UAIAO47X2B</MsgId>
<CreDtTm>2013-10-18T15:40:00</CreDtTm>
<NbOfTxs>1</NbOfTxs>
<TtlIntrBkSttlmAmt Ccy="EUR">1025.00</TtlIntrBkSttlmAmt>
<IntrBkSttlmDt>2013-10-22</IntrBkSttlmDt>
<SttlmInf>
<SttlmMtd>CLRG</SttlmMtd>
<ClrSys>
<Prtry>ST2</Prtry>
</ClrSys>
</SttlmInf>
<InstdAgt>
<FinInstnId>
<BIC>stuff</BIC>
</FinInstnId>
</InstdAgt>
</GrpHdr>
<DrctDbtTxInf>
<PmtId>
<InstrId>DDPreTest18</InstrId>
<EndToEndId>TS141GENR-ZLDL%R5%WXXX</EndToEndId>
<TxId>TRXID01.R8NRO%R4%D</TxId>
</PmtId>
<PmtTpInf>
<SvcLvl>
<Cd>SEPA</Cd>
</SvcLvl>
<LclInstrm>
<Cd>CORE</Cd>
</LclInstrm>
<SeqTp>OOFF</SeqTp>
</PmtTpInf>
<IntrBkSttlmAmt Ccy="EUR">1025.00</IntrBkSttlmAmt>
<ChrgBr>SLEV</ChrgBr>
<ReqdColltnDt>2013-10-22</ReqdColltnDt>
<DrctDbtTx>
<MndtRltdInf>
<MndtId>Mndt141.001b</MndtId>
<DtOfSgntr>2013-09-16</DtOfSgntr>
<AmdmntInd>false</AmdmntInd>
<AmdmntInfDtls>
<OrgnlCdtrSchmeId>
<Id>
<PrvtId>
<Othr>
<Id></Id>
</Othr>
</PrvtId>
</Id>
</OrgnlCdtrSchmeId>
</AmdmntInfDtls>
</MndtRltdInf>
<CdtrSchmeId>
<Id>
<PrvtId>
<Othr>
<Id>stuff</Id>
<SchmeNm><Prtry>SEPA</Prtry></SchmeNm>
</Othr>
</PrvtId>
</Id>
</CdtrSchmeId>
</DrctDbtTx>
<Cdtr>
<Nm>stuff</Nm>
</Cdtr>
<CdtrAcct>
<Id>
<IBAN>stuff</IBAN>
</Id>
</CdtrAcct>
<CdtrAgt>
<FinInstnId>
<BIC>stuff</BIC>
</FinInstnId>
</CdtrAgt>
<Dbtr>
<Nm>stuff</Nm>
</Dbtr>
<DbtrAcct>
<Id>
<IBAN>stuff</IBAN>
</Id>
</DbtrAcct>
<DbtrAgt>
<FinInstnId>
<BIC>stuff</BIC>
</FinInstnId>
</DbtrAgt>
<RmtInf>
<Ustrd>Pre-testing SEPA Direct Debits</Ustrd>
</RmtInf>
</DrctDbtTxInf>
</S2SDDDnf:FIToFICstmrDrctDbt>
</S2SDDDnf:MPEDDDnfBlkDirDeb>
And this is the XSD:
<?xml version="1.0" encoding="UTF-8"?>
<!-- STEP2 SDD Schema, MPEDDDnfBlkDirDeb, May 25th 2012, Release November 2012 -->
<!-- STEP2 SDD Shift camt.056 after pacs.003 in sequence and counter, February 25th 2010 -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:sw3="urn:iso:std:iso:20022:tech:xsd:pacs.003.001.02" xmlns:sw2="urn:iso:std:iso:20022:tech:xsd:pacs.002.001.03" xmlns:sw6="urn:iso:std:iso:20022:tech:xsd:camt.056.001.01" xmlns:S2SDDDnf="urn:S2SDDDnf:xsd:$MPEDDDnfBlkDirDeb" targetNamespace="urn:S2SDDDnf:xsd:$MPEDDDnfBlkDirDeb" elementFormDefault="qualified">
<xs:import namespace="urn:iso:std:iso:20022:tech:xsd:pacs.003.001.02" schemaLocation="pacs.003.001.02.xsd"/>
<xs:import namespace="urn:iso:std:iso:20022:tech:xsd:pacs.002.001.03" schemaLocation="pacs.002.001.03.xsd"/>
<xs:import namespace="urn:iso:std:iso:20022:tech:xsd:camt.056.001.01" schemaLocation="camt.056.001.01.xsd"/>
<xs:element name="MPEDDDnfBlkDirDeb">
<xs:complexType>
<xs:sequence>
<xs:element name="SndgInst" type="sw3:BICIdentifier"/>
<xs:element name="RcvgInst" type="sw3:BICIdentifier"/>
<!-- changed from SrvcID to SrvcId, Febrary 12 2009 -->
<xs:element name="SrvcId" type="S2SDDDnf:SrvcID"/>
<xs:element name="TstCode" type="S2SDDDnf:TestCodeType"/>
<xs:element name="FType" type="S2SDDDnf:FTpType"/>
<xs:element name="FileRef" type="S2SDDDnf:Max16Text"/>
<xs:element name="FileBusDt" type="sw2:ISODate"/>
<xs:element name="RoutingInd" type="S2SDDDnf:RoutingInd"/>
<xs:element name="FileCycleNo" type="S2SDDDnf:Max2NumericText"/>
<xs:element name="NumDDBlk" type="S2SDDDnf:Max8NumericText"/>
<xs:element name="NumPCRBlk" type="S2SDDDnf:Max8NumericText"/>
<xs:element name="NumREJBlk" type="S2SDDDnf:Max8NumericText"/>
<xs:element name="FIToFICstmrDrctDbt" type="sw3:FIToFICustomerDirectDebitV02" minOccurs="0" maxOccurs="unbounded"/>
<!--camt.056.001.01 replace pacs.006.001.02, January 20th 2010 -->
<xs:element name="FIToFIPmtCxlReq" type="sw6:FIToFIPaymentCancellationRequestV01" minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="FIToFIPmtStsRpt" type="sw2:FIToFIPaymentStatusReportV03" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="Max16Text">
<xs:restriction base="xs:string">
<xs:pattern value="[0-9A-Z]{16,16}"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="SrvcID">
<xs:restriction base="xs:string">
<xs:enumeration value="COR"/>
<xs:enumeration value="B2B"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="FTpType">
<xs:restriction base="xs:string">
<xs:enumeration value="DNF"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="TestCodeType">
<xs:restriction base="xs:string">
<xs:length value="1"/>
<xs:enumeration value="T"/>
<xs:enumeration value="P"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="Max8NumericText">
<xs:restriction base="xs:string">
<xs:pattern value="[0-9]{1,8}"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="RoutingInd">
<xs:restriction base="xs:string">
<xs:length value="3" fixed="true"/>
<xs:enumeration value="DIR"/>
<xs:enumeration value="IND"/>
<xs:enumeration value="ALL"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="Max2NumericText">
<xs:restriction base="xs:string">
<xs:pattern value="[0-9]{2,2}"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
And getting this error:
The prefix "S2SDDDnf" for element "S2SDDDnf:MPEDDDnfBlkDirDeb" is not bound. SDDCoreTest18.xml /XMLValidation line 2 XML Problem
Edit
Organize the XSD files in separate folder:

Answer 1

You need to add a definition of the S2SDDDnf alias like so:
<S2SDDDnf:MPEDDDnfBlkDirDeb xmlns = "MPEDDDnfBlkDirDeb.xsd" xmlns:S2SDDDnf="urn:S2SDDDnf:xsd:$MPEDDDnfBlkDirDeb">...</S2SDDDnf:MPEDDDnfBlkDirDeb>

Answer 2

Try creating a XML file referencing the XSD using the New XML File wizard.