Xml document validation using Schema

Question

I want to validate XML Document using XML Schema...
does any body have an idea how to do it.
Every time i m running my java file by using different XML FILE AND XSD FILE in command line i m getting same error.
error is:
Exception in thread "main" org.xml.sax.SAXException: Error: URI=null Line=2: s4s-elt-schema-ns: The namespace of element 'catalog' must be from the schema name space.
at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1115)
at SAXLocalNameCount.main(SAXLocalNameCount.java:117)
Below is my java code with xml file and schema file.
plz get back to me as soon as possible it is urgent.
thanx
java File
import javax.xml.parsers.*;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
import java.util.*;
import java.io.*;
public class SAXLocalNameCount extends DefaultHandler {
/** Constants used for JAXP 1.2 */
static final String JAXP_SCHEMA_LANGUAGE =
"http://java.sun.com/xml/jaxp/properties/schemaLanguage";
static final String W3C_XML_SCHEMA =
"http://www.w3.org/2001/XMLSchema";
static final String JAXP_SCHEMA_SOURCE =
"http://java.sun.com/xml/jaxp/properties/schemaSource";
/** A Hashtable with tag names as keys and Integers as values */
private Hashtable tags;
// Parser calls this once at the beginning of a document
public void startDocument() throws SAXException {
tags = new Hashtable();
// Parser calls this for each element in a document
public void startElement(String namespaceURI, String localName,
String qName, Attributes atts)
     throws SAXException
String key = localName;
Object value = tags.get(key);
if (value == null) {
// Add a new entry
tags.put(key, new Integer(1));
} else {
// Get the current count and increment it
int count = ((Integer)value).intValue();
count++;
tags.put(key, new Integer(count));
System.out.println("TOTAL NUMBER OF TAG IN FILE = "+count);
// Parser calls this once after parsing a document
public void endDocument() throws SAXException {
Enumeration e = tags.keys();
while (e.hasMoreElements()) {
String tag = (String)e.nextElement();
int count = ((Integer)tags.get(tag)).intValue();
System.out.println("Local Name \"" + tag + "\" occurs " + count
+ " times");
static public void main(String[] args) throws Exception {
String filename = null;
String schemaSource = null;
// Parse arguments
schemaSource = args[0];
filename = args[1];
// Create a JAXP SAXParserFactory and configure it
SAXParserFactory spf = SAXParserFactory.newInstance();
// Set namespaceAware to true to get a parser that corresponds to
// the default SAX2 namespace feature setting. This is necessary
// because the default value from JAXP 1.0 was defined to be false.
//spf.setNamespaceAware(true);
// Validation part 1: set whether validation is on
spf.setValidating(true);
// Create a JAXP SAXParser
SAXParser saxParser = spf.newSAXParser();
System.out.println(" saxparser "+saxParser);
// Validation part 2a: set the schema language if necessary
if (true) {
try {
saxParser.setProperty(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA);
System.out.println(" saxparser ");
} catch (SAXNotRecognizedException x) {
// This can happen if the parser does not support JAXP 1.2
System.err.println(
"Error: JAXP SAXParser property not recognized: "
+ JAXP_SCHEMA_LANGUAGE);
System.err.println(
"Check to see if parser conforms to JAXP 1.2 spec.");
System.exit(1);
// Validation part 2b: Set the schema source, if any. See the JAXP
// 1.2 maintenance update specification for more complex usages of
// this feature.
if (schemaSource != null) {
saxParser.setProperty(JAXP_SCHEMA_SOURCE, new File(schemaSource));
System.out.println(" saxparser 123");
// Get the encapsulated SAX XMLReader
XMLReader xmlReader = saxParser.getXMLReader();
System.out.println(" XML READER "+xmlReader);
// Set the ContentHandler of the XMLReader
xmlReader.setContentHandler(new SAXLocalNameCount());
System.out.println(" XML READER 345 ");
// Set an ErrorHandler before parsing
xmlReader.setErrorHandler(new MyErrorHandler(System.err));
System.out.println(" XML READER 67878 ");
// Tell the XMLReader to parse the XML document
xmlReader.parse(filename);
System.out.println(" XML READER ");
// Error handler to report errors and warnings
private static class MyErrorHandler implements ErrorHandler {
/** Error handler output goes here */
private PrintStream out;
MyErrorHandler(PrintStream out) {
this.out = out;
* Returns a string describing parse exception details
private String getParseExceptionInfo(SAXParseException spe) {
String systemId = spe.getSystemId();
if (systemId == null) {
systemId = "null";
String info = "URI=" + systemId +
" Line=" + spe.getLineNumber() +
": " + spe.getMessage();
return info;
// The following methods are standard SAX ErrorHandler methods.
// See SAX documentation for more info.
public void warning(SAXParseException spe) throws SAXException {
out.println("Warning: " + getParseExceptionInfo(spe));
public void error(SAXParseException spe) throws SAXException {
String message = "Error: " + getParseExceptionInfo(spe);
throw new SAXException(message);
public void fatalError(SAXParseException spe) throws SAXException {
String message = "Fatal Error: " + getParseExceptionInfo(spe);
throw new SAXException(message);
xml file(books.xml)
<?xml version="1.0"?>
<catalog>
<book id="bk101">
<author>Gambardella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer</genre>
<price>44.95</price>
<publish_date>2000-10-01</publish_date>
<description>An in-depth look at creating applications
with XML.</description>
</book>
<book id="bk102">
<author>Ralls, Kim</author>
<title>Midnight Rain</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-12-16</publish_date>
<description>A former architect battles corporate zombies,
an evil sorceress, and her own childhood to become queen
of the world.</description>
</book>
<book id="bk103">
<author>Corets, Eva</author>
<title>Maeve Ascendant</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2000-11-17</publish_date>
<description>After the collapse of a nanotechnology
society in England, the young survivors lay the
foundation for a new society.</description>
</book>
<book id="bk104">
<author>Corets, Eva</author>
<title>Oberon's Legacy</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-03-10</publish_date>
<description>In post-apocalypse England, the mysterious
agent known only as Oberon helps to create a new life
for the inhabitants of London. Sequel to Maeve
Ascendant.</description>
</book>
<book id="bk105">
<author>Corets, Eva</author>
<title>The Sundered Grail</title>
<genre>Fantasy</genre>
<price>5.95</price>
<publish_date>2001-09-10</publish_date>
<description>The two daughters of Maeve, half-sisters,
battle one another for control of England. Sequel to
Oberon's Legacy.</description>
</book>
<book id="bk106">
<author>Randall, Cynthia</author>
<title>Lover Birds</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-09-02</publish_date>
<description>When Carla meets Paul at an ornithology
conference, tempers fly as feathers get ruffled.</description>
</book>
<book id="bk107">
<author>Thurman, Paula</author>
<title>Splish Splash</title>
<genre>Romance</genre>
<price>4.95</price>
<publish_date>2000-11-02</publish_date>
<description>A deep sea diver finds true love twenty
thousand leagues beneath the sea.</description>
</book>
<book id="bk108">
<author>Knorr, Stefan</author>
<title>Creepy Crawlies</title>
<genre>Horror</genre>
<price>4.95</price>
<publish_date>2000-12-06</publish_date>
<description>An anthology of horror stories about roaches,
centipedes, scorpions and other insects.</description>
</book>
<book id="bk109">
<author>Kress, Peter</author>
<title>Paradox Lost</title>
<genre>Science Fiction</genre>
<price>6.95</price>
<publish_date>2000-11-02</publish_date>
<description>After an inadvertant trip through a Heisenberg
Uncertainty Device, James Salway discovers the problems
of being quantum.</description>
</book>
<book id="bk110">
<author>O'Brien, Tim</author>
<title>Microsoft .NET: The Programming Bible</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-09</publish_date>
<description>Microsoft's .NET initiative is explored in
detail in this deep programmer's reference.</description>
</book>
<book id="bk111">
<author>O'Brien, Tim</author>
<title>MSXML3: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>36.95</price>
<publish_date>2000-12-01</publish_date>
<description>The Microsoft MSXML3 parser is covered in
detail, with attention to XML DOM interfaces, XSLT processing,
SAX and more.</description>
</book>
<book id="bk112">
<author>Galos, Mike</author>
<title>Visual Studio 7: A Comprehensive Guide</title>
<genre>Computer</genre>
<price>49.95</price>
<publish_date>2001-04-16</publish_date>
<description>Microsoft Visual Studio 7 is explored in depth,
looking at how Visual Basic, Visual C++, C#, and ASP+ are
integrated into a comprehensive development
environment.</description>
</book>
</catalog>
(books.xsd)
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:element name="catalog">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="book" minOccurs="0" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="author" type="xsd:string"/>
<xsd:element name="title" type="xsd:string"/>
<xsd:element name="genre" type="xsd:string"/>
<xsd:element name="price" type="xsd:float"/>
<xsd:element name="publish_date" type="xsd:date"/>
<xsd:element name="description" type="xsd:string"/>
</xsd:sequence>
<xsd:attribute name="id" type="xsd:string"/>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>

Answer 1

Add xmlns:xsi attribute to the root element <catalog>.
<catalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation='books.xsd'>