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#include <QtCore>

#include <QtXmlPatterns>

class Schema

{

    public:

        void loadFromUrl() const;

        void loadFromFile() const;

        void loadFromData() const;

};

void Schema::loadFromUrl() const

{

//! [0]

    QUrl url("http://www.schema-example.org/myschema.xsd");

    QXmlSchema schema;

    if (schema.load(url) == true)

        qDebug() << "schema is valid";

    else

        qDebug() << "schema is invalid";

//! [0]

}

void Schema::loadFromFile() const

{

//! [1]

    QFile file("myschema.xsd");

    file.open(QIODevice::ReadOnly);

    QXmlSchema schema;

    schema.load(&file, QUrl::fromLocalFile(file.fileName()));

    if (schema.isValid())

        qDebug() << "schema is valid";

    else

        qDebug() << "schema is invalid";

//! [1]

}

void Schema::loadFromData() const

{

//! [2]

    QByteArray data( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"

                     "<xsd:schema"

                     "        xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""

                     "        xmlns=\"http://qt.nokia.com/xmlschematest\""

                     "        targetNamespace=\"http://qt.nokia.com/xmlschematest\""

                     "        version=\"1.0\""

                     "        elementFormDefault=\"qualified\">"

                     "</xsd:schema>" );

    QBuffer buffer(&data);

    buffer.open(QIODevice::ReadOnly);

    QXmlSchema schema;

    schema.load(&buffer);

    if (schema.isValid())

        qDebug() << "schema is valid";

    else

        qDebug() << "schema is invalid";

//! [2]

}

int main(int argc, char **argv)

{

    QCoreApplication app(argc, argv);

    Schema schema;

    schema.loadFromUrl();

    schema.loadFromFile();

    schema.loadFromData();

    return 0;

}