XML Namespaces

[Rayven]

How do I enter an XML namespace using the DOM Documents in Qt4.4? I have sucessfully created an XML file using the QDomDocument. Now I am trying to add the "msp" namespace to my markup.

QDomElement root = mOutputDomDoc.createElementNS( "msp", "Report" );
...

QDomElement root = mOutputDomDoc.createElementNS( "msp", "Report" );
...

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This produces the XML

<Report xmlns="msp">...</Report>

when I am looking for: <msp:Report>...</Report>. This same thing occurs with createAttributeNS( "msp", "Tag" ). Is there something that I am doing wrong with the namespaces?

Thanks!

[wysota]

I think you can use .createElement("msp:Report").

[patrik08]

I think you can use .createElement("msp:Report").

no... its attributes..

QDateTime timer1( QDateTime::currentDateTime() );  /* time root */
    QDomElement basexslforoot = wdoc.createElement("fo:root");
                basexslforoot.setAttribute ("xmlns:fo","http://www.w3.org/1999/XSL/Format");
                basexslforoot.setAttribute ("xmlns:svg","http://www.w3.org/2000/svg");
                basexslforoot.setAttribute ("xmlns:cms","http://www.pulitzer.ch/2007/CMSFormat");
                basexslforoot.setAttribute ("xmlns:fox","http://xmlgraphics.apache.org/fop/extensions");

QDateTime timer1( QDateTime::currentDateTime() );  /* time root */
    QDomElement basexslforoot = wdoc.createElement("fo:root");
                basexslforoot.setAttribute ("xmlns:fo","http://www.w3.org/1999/XSL/Format");
                basexslforoot.setAttribute ("xmlns:svg","http://www.w3.org/2000/svg");
                basexslforoot.setAttribute ("xmlns:cms","http://www.pulitzer.ch/2007/CMSFormat");
                basexslforoot.setAttribute ("xmlns:fox","http://xmlgraphics.apache.org/fop/extensions");

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[Rayven]

I think you can use .createElement("msp:Report").

no... its attributes..

QDateTime timer1( QDateTime::currentDateTime() );  /* time root */
    QDomElement basexslforoot = wdoc.createElement("fo:root");
                basexslforoot.setAttribute ("xmlns:fo","http://www.w3.org/1999/XSL/Format");
                basexslforoot.setAttribute ("xmlns:svg","http://www.w3.org/2000/svg");
                basexslforoot.setAttribute ("xmlns:cms","http://www.pulitzer.ch/2007/CMSFormat");
                basexslforoot.setAttribute ("xmlns:fox","http://xmlgraphics.apache.org/fop/extensions");

QDateTime timer1( QDateTime::currentDateTime() );  /* time root */
    QDomElement basexslforoot = wdoc.createElement("fo:root");
                basexslforoot.setAttribute ("xmlns:fo","http://www.w3.org/1999/XSL/Format");
                basexslforoot.setAttribute ("xmlns:svg","http://www.w3.org/2000/svg");
                basexslforoot.setAttribute ("xmlns:cms","http://www.pulitzer.ch/2007/CMSFormat");
                basexslforoot.setAttribute ("xmlns:fox","http://xmlgraphics.apache.org/fop/extensions");

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Both of these answers worked, for elements and attributes.

This is more a question for the Trolls, but why are there functions for creating elements (createelementns.html"]createElementNS[/URL]) and attributes (createattributens[/b].html"] createAttributeNS[/URL]) that are in a particular namespace, if they do not place the namespace declaration in the appropriate place? I know full XML support was just added in recent release, but it seems premature to add the namespaces if the just add a new attribute...

[wysota]

The approach is based on a DOM tree, so it's like building using building blocks - you have to place each block in an appropriate place yourself.

[patrik08]

If you having many namenspace use;
QXmlStreamWriter

you declare all namenspace at construct class

( qt 4.5 version code )

#include <QXmlStreamWriter>
This class was introduced in Qt 4.3.
and write faster as dom

textNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:text:1.0")),
    styleNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:style:1.0")),
    foNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0")),
    tableNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:table:1.0")),
    drawNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:drawing:1.0")),
    xlinkNS (QLatin1String("http://www.w3.org/1999/xlink")),
    svgNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0")),

textNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:text:1.0")),
    styleNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:style:1.0")),
    foNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0")),
    tableNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:table:1.0")),
    drawNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:drawing:1.0")),
    xlinkNS (QLatin1String("http://www.w3.org/1999/xlink")),
    svgNS (QLatin1String("urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0")),

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After you only writer.writeStartElement(drawNS, QString::fromLatin1("frame"));

this sample draw a image to openoffice format

void QTextOdfWriter::writeInlineCharacter(QXmlStreamWriter &writer, const QTextFragment &fragment) const
{
    writer.writeStartElement(drawNS, QString::fromLatin1("frame"));
    if (m_strategy == 0) {
        // don't do anything.
    }
    else if (fragment.charFormat().isImageFormat()) {
        QTextImageFormat imageFormat = fragment.charFormat().toImageFormat();
        writer.writeAttribute(drawNS, QString::fromLatin1("name"), imageFormat.name());
 
        // vvv  Copy pasted mostly from Qt =================
        QImage image;
        QString name = imageFormat.name();
        if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
            name.prepend(QLatin1String("qrc"));
        QUrl url = QUrl::fromEncoded(name.toUtf8());
        const QVariant data = m_document->resource(QTextDocument::ImageResource, url);
        if (data.type() == QVariant::Image) {
            image = qvariant_cast<QImage>(data);
        } else if (data.type() == QVariant::ByteArray) {
            image.loadFromData(data.toByteArray());
        }
 
        if (image.isNull()) {
            QString context;
            if (QTextImageHandler::externalLoader)
                image = QTextImageHandler::externalLoader(name, context);
 
            if (image.isNull()) { // try direct loading
                name = imageFormat.name(); // remove qrc:/ prefix again
                image.load(name);
            }
        }
 
        // ^^^ Copy pasted mostly from Qt =================
        if (! image.isNull()) {
            QBuffer imageBytes;
            QImageWriter imageWriter(&imageBytes, "png");
            imageWriter.write(image);
            QString filename = m_strategy->createUniqueImageName();
            m_strategy->addFile(filename, QString::fromLatin1("image/png"), imageBytes.data());
 
            // get the width/height from the format.
            qreal width = (imageFormat.hasProperty(QTextFormat::ImageWidth)) ? imageFormat.width() : image.width();
            writer.writeAttribute(svgNS, QString::fromLatin1("width"), pixelToPoint(width));
            qreal height = (imageFormat.hasProperty(QTextFormat::ImageHeight)) ? imageFormat.height() : image.height();
            writer.writeAttribute(svgNS, QString::fromLatin1("height"), pixelToPoint(height));
 
            writer.writeStartElement(drawNS, QString::fromLatin1("image"));
            writer.writeAttribute(xlinkNS, QString::fromLatin1("href"), filename);
            writer.writeEndElement(); // image
        }
    }
 
    writer.writeEndElement(); // frame
}

void QTextOdfWriter::writeInlineCharacter(QXmlStreamWriter &writer, const QTextFragment &fragment) const
{
    writer.writeStartElement(drawNS, QString::fromLatin1("frame"));
    if (m_strategy == 0) {
        // don't do anything.
    }
    else if (fragment.charFormat().isImageFormat()) {
        QTextImageFormat imageFormat = fragment.charFormat().toImageFormat();
        writer.writeAttribute(drawNS, QString::fromLatin1("name"), imageFormat.name());

        // vvv  Copy pasted mostly from Qt =================
        QImage image;
        QString name = imageFormat.name();
        if (name.startsWith(QLatin1String(":/"))) // auto-detect resources
            name.prepend(QLatin1String("qrc"));
        QUrl url = QUrl::fromEncoded(name.toUtf8());
        const QVariant data = m_document->resource(QTextDocument::ImageResource, url);
        if (data.type() == QVariant::Image) {
            image = qvariant_cast<QImage>(data);
        } else if (data.type() == QVariant::ByteArray) {
            image.loadFromData(data.toByteArray());
        }

        if (image.isNull()) {
            QString context;
            if (QTextImageHandler::externalLoader)
                image = QTextImageHandler::externalLoader(name, context);

            if (image.isNull()) { // try direct loading
                name = imageFormat.name(); // remove qrc:/ prefix again
                image.load(name);
            }
        }

        // ^^^ Copy pasted mostly from Qt =================
        if (! image.isNull()) {
            QBuffer imageBytes;
            QImageWriter imageWriter(&imageBytes, "png");
            imageWriter.write(image);
            QString filename = m_strategy->createUniqueImageName();
            m_strategy->addFile(filename, QString::fromLatin1("image/png"), imageBytes.data());

            // get the width/height from the format.
            qreal width = (imageFormat.hasProperty(QTextFormat::ImageWidth)) ? imageFormat.width() : image.width();
            writer.writeAttribute(svgNS, QString::fromLatin1("width"), pixelToPoint(width));
            qreal height = (imageFormat.hasProperty(QTextFormat::ImageHeight)) ? imageFormat.height() : image.height();
            writer.writeAttribute(svgNS, QString::fromLatin1("height"), pixelToPoint(height));

            writer.writeStartElement(drawNS, QString::fromLatin1("image"));
            writer.writeAttribute(xlinkNS, QString::fromLatin1("href"), filename);
            writer.writeEndElement(); // image
        }
    }

    writer.writeEndElement(); // frame
}

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have a look on:
http://fop-miniscribus.googlecode.co...todfwriter.cpp
it begin at bottom....