Validate your XML files in DBXML

I know that when validating your XML files in your container that has validation set , you can use the exact location (local) or use a URL where your XSD file exists.
My question is I have put the xsd file in my container itself, but am not being able to change settings in my Schema instance file(XML) that will get validated against this internal schema in the container. I know this is possible if anyone could help it would be highly appreciated
Thanks
Sarva
DBXML NEWBIE

Sarva,
You should be able to change the reference to your .xsd file to a URI that points into a BDB XML container.
E.g. ... xsi:schemaLocation="http://some_uri dbxml:containerName/myschema.xsd" ...
If you try this and still have problems, please post all of the details of what you have tried.
Regards,
George

Similar Messages

Can I validate an XML file using an external DTD

Hi,
I'm trying to use an external DTD to validate an XML
file (which does not refer to this DTD). The java docs that ship
with the XML parser aren't clear on how exactly to do this (or
whether it can be done). I'd appreciate any advice on how I
should perform this operation.
Here's what I'm doing right now.
1) The Java file
import oracle.xml.parser.v2.*;
public class ParseWithExternalDTD
public static void main(String args[]) throws Exception
DOMParser dp=new DOMParser();
dp.parseDTD
("file:d:/jdk1.2/sample/test/family.DTD","family");
DTD dtd=dp.getDoctype();
dp.setDoctype(dtd);
dp.parse("file:d:/jdk1.2/sample/test/family.xml");
System.out.println("Finished with no errors!");
2) The family.DTD file
<!ELEMENT family (member*)>
<!ATTLIST family lastname CDATA #REQUIRED>
<!ELEMENT member (#PCDATA)>
<!ATTLIST member memberid ID #REQUIRED>
<!ATTLIST member dad IDREF #IMPLIED>
<!ATTLIST member mom IDREF #IMPLIED>
3) The family.xml file
<?xml version="1.0" standalone="no"?>
<family lastname="Smith">
<TagToFoilParserValidation>
</TagToFoilParserValidation>
<member memberid="m1">Sarah</member>
<member memberid="m2">Bob</member>
<member memberid="m3" mom="m1" dad="m2">Joanne</member>
<member memberid="m4" mom="m1" dad="m2">Jim</member>
</family>
4) The output
Finished with no errors!
As you can see, the DOMParser failed to validate the family.xml
file against the family dtd otherwise, it would have reported a
validation error when it came across the
TagToFoilParserValidation.
Any insight as to what I'm doing wrong would be much appreciated.
Sincerely,
Keki
Project Iona
Manufacturing Applications
Oracle Corporation
The views and opinions expressed here are
my own and do not reflect the views and
opinions of Oracle Corporation
null

Keki Burjorjee (Oracle) (guest) wrote:
: 2 further questions related to this issue.
: 1) Say I am using XSLT to transform A.xml into B.xml, and I
: want to embed a reference to B.dtd within the B.xml file. Is
: there an XSLT command which will allow me to do this?
: 2) Is it possible for your team to give me a mechanism whereby
I
: can preset the xml parser to validate the next xml file (or
: inputstream) it receives against a particular DTD? This scheme
: does not require the dtd to be present within the XML file
: Thanks,
: - Keki
: Oracle XML Team wrote:
: : What you are doing wrong is not including a reference to the
: : applicable DTD in your XML document. Without it there is no
: way
: : that the parser knows what to validate against. Including
the
: : reference is the XML standard way of specifying an external
: : DTD. Otherwise you need to embed the DTD in your XML
Document.
: : Oracle XML Team
: : http://technet.oracle.com
: : Oracle Technology Network
: : Keki Burjorjee (guest) wrote:
: : : Hi,
: : : I'm trying to use an external DTD to validate an XML
: : : file (which does not refer to this DTD). The java docs that
: : ship
: : : with the XML parser aren't clear on how exactly to do this
: (or
: : : whether it can be done). I'd appreciate any advice on how I
: : : should perform this operation.
: : : Here's what I'm doing right now.
: : : 1) The Java file
: : : import oracle.xml.parser.v2.*;
: : : public class ParseWithExternalDTD
: : : public static void main(String args[]) throws Exception
: : : DOMParser dp=new DOMParser();
: : : dp.parseDTD
: : : ("file:d:/jdk1.2/sample/test/family.DTD","family");
: : : DTD dtd=dp.getDoctype();
: : : dp.setDoctype(dtd);
: : : dp.parse("file:d:/jdk1.2/sample/test/family.xml");
: : : System.out.println("Finished with no errors!");
: : : 2) The family.DTD file
: : : <!ELEMENT family (member*)>
: : : <!ATTLIST family lastname CDATA #REQUIRED>
: : : <!ELEMENT member (#PCDATA)>
: : : <!ATTLIST member memberid ID #REQUIRED>
: : : <!ATTLIST member dad IDREF #IMPLIED>
: : : <!ATTLIST member mom IDREF #IMPLIED>
: : : 3) The family.xml file
: : : <?xml version="1.0" standalone="no"?>
: : : <family lastname="Smith">
: : : <TagToFoilParserValidation>
: : : </TagToFoilParserValidation>
: : : <member memberid="m1">Sarah</member>
: : : <member memberid="m2">Bob</member>
: : : <member memberid="m3" mom="m1" dad="m2">Joanne</member>
: : : <member memberid="m4" mom="m1" dad="m2">Jim</member>
: : : </family>
: : : 4) The output
: : : Finished with no errors!
: : : As you can see, the DOMParser failed to validate the
: : family.xml
: : : file against the family dtd otherwise, it would have
: reported
: : a
: : : validation error when it came across the
: : : TagToFoilParserValidation.
: : : Any insight as to what I'm doing wrong would be much
: : appreciated.
: : : Sincerely,
: : : Keki
: : : Project Iona
: : : Manufacturing Applications
: : : Oracle Corporation
: : : The views and opinions expressed here are
: : : my own and do not reflect the views and
: : : opinions of Oracle Corporation
1) No XSLT commands exist that allow you to embed a DTD while
doing the transformation.
2) You can use the setDocType() method in the parser, to set a
DTD based on which the XML document will be validated. The
parseDTD() method allows you to parse a DTD file separately and
get a DTD object. Here is a sample code :
DOMParser domparser = new DOMParser();
domparser.setValidationMode(true);
// parse the DTD file
domparser.parseDTD(new FileReader(dtdfile));
DTD dtd = domparser.getDocType();
// Parse XML file - XML file will be validated based on the DTD.
domparser.setDocType(dtd);
domparser.parse(new FileReader(xmlfile));
Document doc = domparser.getDocument();
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
null

How to validate the Xml File With Java

Hi,
Can pls tell me. I want to validate the XML File for the Some Mandartory TAG. if that if Tag null i want to generate error xml file with error and i want move another folder with java. pls help me as soon as possible

Use a validating parser (any recent Xerces, for one) and switch on the validation feature. Very much vendor-specific, so look at the docs of your parser. Oh, you do have a schema for these documents, don't you?

How to validate an XML file in BPEL ?

Hi All,
I have 2 Bpel processes.
One for creating supplier and one for formate Validations.
I am having problems with formate Validations.
I am trying to validate an xml file that is passed to my Bpel Process (SupplierValidation).
My process contains the following:
I have a client which its property Name is set to ValidateXML and its value set to true.
I have a recieve activity and a reply out !
very simple process, but its working !
This process is synchronous.
Help is needed !
Thanks,
aj

you have to use bpelx:validate as sown below
<bpelx:validate variables="inputVariable" name="ValidateInputXML"/>

How to use Xerces to validate an XML file against a DTD

Hi, can anybody tell me how to use Xerces to validate an XML file against a DTD. its urgent. post some sample code. it would be helpful for my project. isupposed to use SAX parser(Xerces)
Thanx in advance

Come on, I googled "xerces validate" and the first link is the Xerces FAQ:
http://xerces.apache.org/xerces-j/faq-general.html
And of course "how to validate" is a Xerces FAQ. Help yourself by doing a little research instead of waiting for other people.

Validate a XML file against multiple schema files

Hello everybody!
How can I validate a XML file against multiple schema files?
I have the following XML file:
<?xml version="1.0" encoding="UTF-8"?>
<bulkCmConfigDataFile xmlns:es="SpecificAttributes.3.0.xsd"
xmlns:xn="genericNrm.xsd"
xmlns="configData.xsd">
<fileHeader fileFormatVersion="32.615 V4.2" vendorName=""/>
<configData dnPrefix="Undefined">
<xn:SubNetwork id="3G">
<xn:SubNetwork id="RNC01">
<xn:MeContext id="RNC01">
<xn:VsDataContainer id="RNC01">
<xn:attributes>
<xn:vsDataType>vsDataMeContext</xn:vsDataType>
<xn:vsDataFormatVersion>SpecificAttributes.3.0</xn:vsDataFormatVersion>
<es:vsDataMeContext>
<es:userLabel>RNC01</es:userLabel>
<es:ipAddress>172.21.3.17</es:ipAddress>
<es:neMIMversion>vF.5.0</es:neMIMversion>
</es:vsDataMeContext>
</xn:attributes>
</xn:VsDataContainer>
</xn:MeContext>
</xn:SubNetwork>
</xn:SubNetwork>
</configData>
<fileFooter dateTime="2006-11-24T11:56:07Z"/>
</bulkCmConfigDataFile>
I want to load this file into a table, validate it (against SpecificAttributes.3.0.xsd, genericNrm.xsd and configData.xsd) and query that table. How would the INSERT .. and the SELECT ... for userLabel attribute look like?
Many thanks!

Hi Peter,
Please use the validateXML BPEL Property : This property validates incoming and outgoing XML documents. If set to true, the Oracle BPEL Process Manager applies schema validation for incoming and outgoing XML documents. This property is applicable to both durable and transient processes. The default value is false.
Cheers
A

Best way to validate and xml file against a schema?

As the subject states, I want to validate my xml file against a given schema....
Currently my code looks like this:
InputSource ipSource = new InputSource(new ByteArrayInputStream(bytesData)); // my xml file
DOMParser parser = new DOMParser();
parser.parse(ipSource);
Document doc = parser.getDocument();
I see that there is a setFeature method on DomParser.... but from what I read that doesnt support
xml schema's, just DTD's. So what is the best way to validate with schema's?
Any help would be appreciated

This is the other way I tried doing it.... the problem with this way is I am building my xml file through DOM
operations... and I haven't figured out how to add the schema line to the xml file through DOM manipulations.
Has anyone done this bofore?
try
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     factory.setNamespaceAware(false);
     factory.setValidating(true);
     InputSource ipSource = new InputSource(new ByteArrayInputStream(bytesData));
     DocumentBuilder builder = factory.newDocumentBuilder();
     doc      = builder.parse(ipSource);
     return doc;
catch(Throwable t)
     System.out.println("parse error: " +t);
return doc;
}

How to validate an XML file with XSD Schema on JDK 1.4

Hi
I'm looking for samples how to validate xml files with xsd schema using jsdk 1.4
Thank you.

This is how.
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
dbfac.setNamespaceAware(true);
SchemaFactory factory1 = SchemaFactory
.newInstance("http://www.w3.org/2001/XMLSchema");
Schema schema = factory1.newSchema(new File("person.xsd"));
dbfac.setSchema(schema);
DocumentBuilder dbparser1 = dbfac.newDocumentBuilder();
Document doc1 = dbparser1.parse(new File("person.xml"));
Validator validator1 = schema.newValidator();
DOMSource dm1 = new DOMSource(doc1);
DOMResult domresult1 = new DOMResult();
validator1.validate(dm1, domresult1);

Validate a XML file with a XSD File in ABAP

Hi everybody,
I am searching a way for validating a XML File with an external XSD File in ABAP. I know to validate with dtd is possible, but what about XSD?
Can you help me in my urgend problem ?
Greetings from Germany
ismail er

anyone an idea for my issue ???

What am I missing to successfully validate an xml file to a reg'd schema?

Greetings
My data base is 10.1 and xdb is installed. I've done the following.
Created xsd and ftp to public dir, my xsd file looks like
<?xml version="1.0" encoding="UTF-8"?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xdb="http://xmlns.oracle.com/xdb">
     <xs:element name="namexml">
          <xs:complexType>
               <xs:sequence>
                    <xs:element ref="firstname"/>
                    <xs:element ref="lastname"/>
                    <xs:element ref="fullname"/>
               </xs:sequence>
          </xs:complexType>
     </xs:element>
     <xs:element name="lastname">
          <xs:simpleType>
               <xs:restriction base="xs:string">
                    <xs:minLength value="1"/>
                    <xs:maxLength value="30"/>
               </xs:restriction>
          </xs:simpleType>
     </xs:element>
     <xs:element name="fullname">
          <xs:simpleType>
               <xs:restriction base="xs:string">
                    <xs:minLength value="1"/>
                    <xs:maxLength value="60"/>
               </xs:restriction>
          </xs:simpleType>
     </xs:element>
     <xs:element name="firstname">
          <xs:simpleType>
               <xs:restriction base="xs:string">
                    <xs:minLength value="1"/>
                    <xs:maxLength value="30"/>
               </xs:restriction>
          </xs:simpleType>
     </xs:element>
</xs:schema>
My xml file I'm trying to validate
<?xml version="1.0" encoding="UTF-8"?>

<namexml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="C:\DOCUME~1\wleonard\Desktop\namexml.xsd">
     <firstname>Bob</firstname>
     <lastname>Smith</lastname>
     <fullname>Bob Smith</fullname>
</namexml>
Registration plsql
BEGIN
dbms_xmlschema.registerSchema(
'http://planmsdev02:8080/public/UTP/XSD/namexml.xsd',
xdbURIType('/public/UTP/XSD/namexml.xsd').getClob(),
TRUE,TRUE,FALSE,TRUE
END;
I created a table to load the xml into
CREATE TABLE UTP_INPUT_XML
I_XML CLOB,
SERVICE_NAME VARCHAR2(30 BYTE)
Insert into the table...
When I try to validate the xml doc with the following plsql, I get invalid. The xml document is valid according to xmlspy using a local xsd on my laptop
DECLARE
xmldoc XMLTYPE;
isSV NUMBER;
BEGIN
-- populate xmldoc (for example, by fetching from table)
SELECT XMLTYPE(i_xml).isSchemaValid('http://planmsdev02:8080/public/UTP/XSD/namexml.xsd')
INTO isSV
     FROM UTP_INPUT_XML
WHERE service_name = 'WAYNE_NAME_2';
-- validate against XML schema
--xmldoc.isSchemaValid('http://planmsdev02:8080/public/UTP/XSD/serviceRequest.xsd');
IF isSV = 1 THEN
     DBMS_OUTPUT.PUT_LINE('VALID');
ELSE
     DBMS_OUTPUT.PUT_LINE('INVALID');
END IF;
END;

[Oracle 9.2.0.8]
I've got the same than wleonard to validate some files. For XMLSpy the file is valid and Oracle told me that the file was invalid.
Any idea ?

Where can i find ozxmlscene DOCTYPE to validate the XML Motion files i create

Hi ,
i'm creating Motion files to be inserted into FCP 7 TimeLine or Motion 3
It works perfectly except sometimes the XML file i produce crash FCP or Motion
(theses .motn files are allways made with the same methods by a php script that produces UTF-8 motn files)
I checked the content of th files without finding any problem
As a matter of fact i still haven't found the way to validate these xml files for i was unable to find th OZXMLSCENE DTD for it
Could you help me please?
Francis67

The enabling part will have to be done with LiveCycle Reader Extensions, which is also available from Datalogics as the PDF Java Toolkit with Reader Extensions.
If you can get all of your users to move to Reader 11 and don't use digital signatures, consider:
1. Appligent's AppendPDF Pro, perhaps along with FDFMerge.
2. Debenu's Quick PDF Library
3. iText

How to get ALL validate-errors while insert xml-file into xml_schema_table

How to get all validate-errors while using insert into xml_schema when having a xml-instance with more then one error inside ?
Hi,
I can validate a xml-file by using isSchemaValid() - function to get the validate-status 0 or 1 .
To get a error-output about the reason I do validate
the xml-file against xdb-schema, by insert it into schema_table.
When more than one validate-errors inside the xml-file,
the exception shows me the first error only.
How to get all errors at one time ?
regards
Norbert
... for example like this matter:
declare
     xmldoc CLOB;
     vStatus varchar
begin
-- ... create xmldoc by using DBMS_XMLGEN ...
-- validate by using insert ( I do not need insert ;-) )
     begin
     -- there is the xml_schema in xdb with defaultTable XML_SCHEMA_DEFAULT_TABLE
     insert into XML_SCHEMA_DEFAULT_TABLE values (xmltype(xmldoc) ) ;
     vStatus := 'XML-Instance is valid ' ;
     exception
     when others then
     -- it's only the first error while parsing the xml-file :
          vStatus := 'Instance is NOT valid: '||sqlerrm ;
          dbms_output.put_line( vStatus );
     end ;
end ;

If I am not mistaken, the you probably could google this one while using "Steven Feuerstein Validation" or such. I know I have seen a very decent validation / error handling from Steven about this.

Can't validate xml file

Hi
My problem is that I'm not able to validate my xml file using example code taken from java.sun.com page:
http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/validation/package-summary.html
The source code is:
// parse an XML document into a DOM tree
    DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    Document document = parser.parse(new File("instance.xml"));
    // create a SchemaFactory capable of understanding WXS schemas
    SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    // load a WXS schema, represented by a Schema instance
    Source schemaFile = new StreamSource(new File("mySchema.xsd"));
    Schema schema = factory.newSchema(schemaFile);
    // create a Validator instance, which can be used to validate an instance document
    Validator validator = schema.newValidator();
    // validate the DOM tree
    try {
        validator.validate(new DOMSource(document));
    } catch (SAXException e) {
        // instance document is invalid!
    }My XSD file:
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.org/schema" xmlns:tns="http://www.example.org/schema">
     <element name="parent">
          <complexType>
               <sequence maxOccurs="unbounded" minOccurs="0">
                    <element name="child" type="string"></element>
               </sequence>
          </complexType>
     </element>
</schema>..and my XML file:
<?xml version="1.0" encoding="UTF-8"?>
<tns:parent xmlns:tns="http://www.example.org/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.org/schema schema.xsd ">
</tns:parent>..and the error message:
org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element 'tns:parent'.
     at com.sun.org.apache.xerces.internal.jaxp.validation.Util.toSAXParseException(Util.java:109)
     at com.sun.org.apache.xerces.internal.jaxp.validation.ErrorHandlerAdaptor.error(ErrorHandlerAdaptor.java:104)
     at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:382)
     at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:316)
     at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1944)
     at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:705)
     at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.startElement(ValidatorHandlerImpl.java:335)
     at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1020)
     at org.apache.xml.utils.TreeWalker.startNode(TreeWalker.java:347)
     at org.apache.xml.utils.TreeWalker.traverse(TreeWalker.java:159)
     at org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:337)
     at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.process(ValidatorImpl.java:220)
     at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:141)
     at javax.xml.validation.Validator.validate(Validator.java:82)
     at main.XMLValidation.main(XMLValidation.java:42)I've lost any ideas. What's wrong?????????? HELP
ania

I am also using rsaft_pt_xml to generate audit file for Protugal project. The xml file losing </auditfile> and </masterfile> tag. In that case, the xml file can not be display correctly. We also have patched the sap notes to "1543036 - SAFT-PT Corrections RSAFT_PT_XML for 2010 (16)", but it does not work. Do you know how to solve this issue?

Creating an xml file from recordset

Hi...
XML newbie here - so.
Is it possible to create and xml file from a recordset?
I need to create a datafeed of our e-commerce products.
Also, some of the db data contains HTML Code (product
description field),
how will this effect the xml file?
Another problem is that my xml file needs to contain url's
for the products
and product images. My ASP pages contain these URL in hard
code and then
pull the actual file names from the db
Hope that makes some sense
Thanks for any help
Andy

Hi David
Thanks for your help.
I think it will have to be option 1 as i am using Access DB.
I don't know how to go about it but will serach good old
Google.
Here is my recordset below, that pulls the required data from
Access.
The product and product image URL's need to be in the xml
file but only the
product image name and product id are in the database, e.g
image name
(imagename.jpg) productid (21)
The actual URL's are hardcoded in my ASP pages, e.g <img
src="products/medium/<%=(RSDetails.Fields.Item("Image").Value)%>"
Not sure if this makes things any clearer :-|
Thanks Again
Andy
<%
Dim RSdatafeed
Dim RSdatafeed_numRows
Set RSdatafeed = Server.CreateObject("ADODB.Recordset")
RSdatafeed.ActiveConnection = MM_shoppingcart_STRING
RSdatafeed.Source = "SELECT Products.Product,
Products.Description,
Products.Image, Products.image2, Products.ListPrice,
Products.Price,
Products.xml_feed, Manufacturers.Manufacturer,
Shipping.ShippingCost FROM
Shipping, Products INNER JOIN Manufacturers ON
Products.ManufacturerID =
Manufacturers.ManufacturerID WHERE
(((Products.xml_feed)=No));"
RSdatafeed.CursorType = 0
RSdatafeed.CursorLocation = 2
RSdatafeed.LockType = 1
RSdatafeed.Open()
RSdatafeed_numRows = 0
%>
"DEPearson" <[email protected]> wrote in
message
news:[email protected]...
> Andy,
>
> There are two ways you can create a xml file from a
recordset
>
> 1. Is to code it using Server.CreateObject(XMLDOM)
> 2. If you are using SQL server 2005, just request the RS
returns as XML
> data. using FOR XML AUTO after the where cause ( the
best way with 2005
> and
> higher sql server)
>
> The db data containing HTML code should not effect your
xml file, unless
> it
> is bad markup. You could wrap the data with
<![CDATA[the data or html
> markup, or javascript]]>
>
> If the url is a recordset field, then it will return
with the xml data.
> If
> not you can create a storage procedure that will build
your URL from the
> data
> in the database.
>
> It is best to use storage procedure (SP )for security
reason when pulling
> data
> from a MS Sql server, make all calls to the database in
a SP. Also be sure
> to
> validate the values in the querystrings before accepting
them, check for
> hack
> code.
>
> David
>

How to indicate the Schema path for a XML file when parsing?

I have to validate a XML file. At the header line of this file, I need to specificate only the name of the schema but not the full path:
<DATAMODULES xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Datamodules.xsd">
When validating, there is any way to specify to the parser the correct location of the XSD file?
I know I could copy the XSD file to the XML file directory or vice versa, but I cannot do that and I need a software solution.
Could someone help me?

An External Parsed Entity could be used to reference a schema.
In your DTD:
<!ENTITY datamodules SYSTEM "file:///c:/Datamodules/Datamodules.xsd">
Refer the external entity in xml document:
<datamodules>&datamodules;</datamodules>

Validate your XML files in DBXML

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