diff --git a/src/app/puzzle/main.cpp b/src/app/puzzle/main.cpp
index 1b5bb9174..570b8e8c3 100644
--- a/src/app/puzzle/main.cpp
+++ b/src/app/puzzle/main.cpp
@@ -32,7 +32,6 @@
 #include "vpapplication.h"
 #include "../vmisc/def.h"
 
-
 #if defined(APPIMAGE) && defined(Q_OS_LINUX)
 #if QT_VERSION < QT_VERSION_CHECK(5, 12, 0)
 #   include "../vmisc/backport/qscopeguard.h"
@@ -42,6 +41,10 @@
 #   include "../vmisc/appimage.h"
 #endif // defined(APPIMAGE) && defined(Q_OS_LINUX)
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <xercesc/util/PlatformUtils.hpp>
+#endif
+
 auto main(int argc, char *argv[]) -> int
 {
 #if defined(APPIMAGE) && defined(Q_OS_LINUX)
@@ -68,6 +71,12 @@ auto main(int argc, char *argv[]) -> int
     InitHighDpiScaling(argc, argv);
 #endif //Q_OS_MAC
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    XERCES_CPP_NAMESPACE::XMLPlatformUtils::Initialize();
+
+    auto Terminate = qScopeGuard([](){ XERCES_CPP_NAMESPACE::XMLPlatformUtils::Terminate(); });
+#endif
+
     VPApplication app(argc, argv);
     app.InitOptions();
 
diff --git a/src/app/tape/main.cpp b/src/app/tape/main.cpp
index f5d58306e..564ebf79b 100644
--- a/src/app/tape/main.cpp
+++ b/src/app/tape/main.cpp
@@ -40,6 +40,10 @@
 #   include "../vmisc/appimage.h"
 #endif // defined(APPIMAGE) && defined(Q_OS_LINUX)
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <xercesc/util/PlatformUtils.hpp>
+#endif
+
 auto main(int argc, char *argv[]) -> int
 {
 #if defined(APPIMAGE) && defined(Q_OS_LINUX)
@@ -61,6 +65,12 @@ auto main(int argc, char *argv[]) -> int
     VAbstractApplication::WinAttachConsole();
 #endif
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    XERCES_CPP_NAMESPACE::XMLPlatformUtils::Initialize();
+
+    auto Terminate = qScopeGuard([](){ XERCES_CPP_NAMESPACE::XMLPlatformUtils::Terminate(); });
+#endif
+
 #ifndef Q_OS_MAC // supports natively
     InitHighDpiScaling(argc, argv);
 #endif //Q_OS_MAC
diff --git a/src/app/valentina/core/vapplication.cpp b/src/app/valentina/core/vapplication.cpp
index 0e5d77cda..6de88b815 100644
--- a/src/app/valentina/core/vapplication.cpp
+++ b/src/app/valentina/core/vapplication.cpp
@@ -49,10 +49,13 @@
 #include <QMessageBox>
 #include <QThread>
 #include <QDateTime>
-#include <QtXmlPatterns>
 #include <QIcon>
 #include <Qt>
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#include <QtXmlPatterns>
+#endif
+
 #if !defined(BUILD_REVISION) && defined(QBS_BUILD)
 #include <vcsRepoState.h>
 #define BUILD_REVISION VCS_REPO_STATE_REVISION
diff --git a/src/app/valentina/main.cpp b/src/app/valentina/main.cpp
index dd7743ac1..89aa3cd35 100644
--- a/src/app/valentina/main.cpp
+++ b/src/app/valentina/main.cpp
@@ -43,6 +43,10 @@
 #   include "../vmisc/appimage.h"
 #endif // defined(APPIMAGE) && defined(Q_OS_LINUX)
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <xercesc/util/PlatformUtils.hpp>
+#endif
+
 //---------------------------------------------------------------------------------------------------------------------
 
 auto main(int argc, char *argv[]) -> int
@@ -77,6 +81,12 @@ auto main(int argc, char *argv[]) -> int
     InitHighDpiScaling(argc, argv);
 #endif //Q_OS_MAC
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    XERCES_CPP_NAMESPACE::XMLPlatformUtils::Initialize();
+
+    auto Terminate = qScopeGuard([](){ XERCES_CPP_NAMESPACE::XMLPlatformUtils::Terminate(); });
+#endif
+
     VApplication app(argc, argv);
     app.InitOptions();
 
diff --git a/src/app/valentina/mainwindow.cpp b/src/app/valentina/mainwindow.cpp
index 70bfee8be..b3f56c3a0 100644
--- a/src/app/valentina/mainwindow.cpp
+++ b/src/app/valentina/mainwindow.cpp
@@ -185,7 +185,11 @@
 #include <QShowEvent>
 #include <QScrollBar>
 #include <QFileDialog>
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <QSourceLocation>
+#endif
+
 #include <QUndoStack>
 #include <QAction>
 #include <QProcess>
diff --git a/src/libs/ifc/ifc.qbs b/src/libs/ifc/ifc.qbs
index 8288330e3..665589212 100644
--- a/src/libs/ifc/ifc.qbs
+++ b/src/libs/ifc/ifc.qbs
@@ -14,6 +14,12 @@ VLib {
         condition: Utilities.versionCompare(Qt.core.version, "6") >= 0
     }
 
+    Depends {
+        name: "xerces-c"
+        condition: Utilities.versionCompare(Qt.core.version, "6") >= 0 && qbs.targetOS.contains("unix")
+                   && !qbs.targetOS.contains("macos")
+    }
+
     name: "IFCLib"
     files: [
         "ifcdef.h",
@@ -43,7 +49,7 @@ VLib {
             "vexceptionwrongid.cpp",
             "vexceptionundo.cpp",
             "vexceptioninvalidnotch.cpp",
-            "vexceptioninvalidhistory.cpp", 
+            "vexceptioninvalidhistory.cpp"
         ]
     }
 
@@ -56,6 +62,8 @@ VLib {
             "vbackgroundpatternimage.h",
             "vdomdocument.h",
             "vlayoutconverter.h",
+            "vparsererrorhandler.cpp",
+            "vparsererrorhandler.h",
             "vpatternconverter.h",
             "vpatternimage.h",
             "vtoolrecord.h",
diff --git a/src/libs/ifc/xml/vabstractconverter.cpp b/src/libs/ifc/xml/vabstractconverter.cpp
index 7d854b656..fa3bac8d6 100644
--- a/src/libs/ifc/xml/vabstractconverter.cpp
+++ b/src/libs/ifc/xml/vabstractconverter.cpp
@@ -27,8 +27,15 @@
  *************************************************************************/
 
 #include "vabstractconverter.h"
+#include "vparsererrorhandler.h"
+
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <xercesc/parsers/XercesDOMParser.hpp>
+#else
+#include <QXmlSchema>
+#include <QXmlSchemaValidator>
+#endif // QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 
-#include <QAbstractMessageHandler>
 #include <QDir>
 #include <QDomElement>
 #include <QDomNode>
@@ -39,73 +46,13 @@
 #include <QMap>
 #include <QRegularExpression>
 #include <QRegularExpressionMatch>
-#include <QSourceLocation>
 #include <QStringList>
 #include <QTextDocument>
 #include <QUrl>
-#include <QXmlSchema>
-#include <QXmlSchemaValidator>
 
 #include "../exception/vexception.h"
 #include "vdomdocument.h"
 
-//This class need for validation pattern file using XSD shema
-class MessageHandler : public QAbstractMessageHandler
-{
-public:
-    MessageHandler()
-        : QAbstractMessageHandler(),
-          m_messageType(QtMsgType()),
-          m_description(),
-          m_sourceLocation(QSourceLocation())
-    {}
-
-    QString statusMessage() const;
-    qint64  line() const;
-    qint64  column() const;
-protected:
-    // cppcheck-suppress unusedFunction
-    virtual void handleMessage(QtMsgType type, const QString &description,
-                               const QUrl &identifier, const QSourceLocation &sourceLocation) override;
-private:
-    QtMsgType       m_messageType;
-    QString         m_description;
-    QSourceLocation m_sourceLocation;
-};
-
-//---------------------------------------------------------------------------------------------------------------------
-QString MessageHandler::statusMessage() const
-{
-    QTextDocument doc;
-    doc.setHtml(m_description);
-    return doc.toPlainText();
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-inline qint64  MessageHandler::line() const
-{
-    return m_sourceLocation.line();
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-inline qint64  MessageHandler::column() const
-{
-    return m_sourceLocation.column();
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-// cppcheck-suppress unusedFunction
-void MessageHandler::handleMessage(QtMsgType type, const QString &description, const QUrl &identifier,
-                                   const QSourceLocation &sourceLocation)
-{
-    Q_UNUSED(type)
-    Q_UNUSED(identifier)
-
-    m_messageType = type;
-    m_description = description;
-    m_sourceLocation = sourceLocation;
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 VAbstractConverter::VAbstractConverter(const QString &fileName)
     : m_ver(0x0),
@@ -222,6 +169,70 @@ void VAbstractConverter::BiasTokens(vsizetype position, vsizetype bias, QMap<vsi
 void VAbstractConverter::ValidateXML(const QString &schema) const
 {
     qCDebug(vXML, "Validation xml file %s.", qUtf8Printable(m_convertedFileName));
+
+    QFile fileSchema(schema);
+    if (not fileSchema.open(QIODevice::ReadOnly))
+    {
+        const QString errorMsg(tr("Can't open schema file %1:\n%2.").arg(schema, fileSchema.errorString()));
+        throw VException(errorMsg);
+    }
+
+    VParserErrorHandler parserErrorHandler;
+
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    QScopedPointer<QTemporaryFile> tempSchema(QTemporaryFile::createNativeFile(fileSchema));
+    if (tempSchema == nullptr)
+    {
+        const QString errorMsg(tr("Can't create native file for schema file %1:\n%2.")
+                                   .arg(schema, fileSchema.errorString()));
+        throw VException(errorMsg);
+    }
+
+    if (tempSchema->open())
+    {
+        XercesDOMParser domParser;
+        domParser.setErrorHandler(&parserErrorHandler);
+
+        if (domParser.loadGrammar(
+                tempSchema->fileName().toUtf8().constData(), Grammar::SchemaGrammarType, true) == nullptr)
+        {
+            VException e(parserErrorHandler.StatusMessage());
+            e.AddMoreInformation(tr("Could not load schema file '%1'.").arg(fileSchema.fileName()));
+            throw e;
+        }
+
+        qCDebug(vXML, "Schema loaded.");
+
+        if (parserErrorHandler.HasError())
+        {
+            VException e(parserErrorHandler.StatusMessage());
+            e.AddMoreInformation(tr("Schema file %3 invalid in line %1 column %2").arg(parserErrorHandler.Line())
+                                     .arg(parserErrorHandler.Column()).arg(fileSchema.fileName()));
+            throw e;
+        }
+
+        domParser.setValidationScheme(XercesDOMParser::Val_Always);
+        domParser.setDoNamespaces(true);
+        domParser.setDoSchema(true);
+        domParser.setValidationConstraintFatal(true);
+        domParser.setValidationSchemaFullChecking(true);
+        domParser.useCachedGrammarInParse(true);
+
+        domParser.parse(m_convertedFileName.toUtf8().constData());
+
+        if (domParser.getErrorCount() > 0)
+        {
+            VException e(parserErrorHandler.StatusMessage());
+            e.AddMoreInformation(tr("Validation error file %3 in line %1 column %2").arg(parserErrorHandler.Line())
+                                     .arg(parserErrorHandler.Column()).arg(m_originalFileName));
+            throw e;
+        }
+    }
+    else
+    {
+        qCritical() << tr("Unable to open native file for schema");
+    }
+#else
     QFile pattern(m_convertedFileName);
     if (not pattern.open(QIODevice::ReadOnly))
     {
@@ -229,22 +240,12 @@ void VAbstractConverter::ValidateXML(const QString &schema) const
         throw VException(errorMsg);
     }
 
-    QFile fileSchema(schema);
-    if (not fileSchema.open(QIODevice::ReadOnly))
-    {
-        pattern.close();
-        const QString errorMsg(tr("Can't open schema file %1:\n%2.").arg(schema, fileSchema.errorString()));
-        throw VException(errorMsg);
-    }
-
-    MessageHandler messageHandler;
+    VParserErrorHandler messageHandler;
     QXmlSchema sch;
     sch.setMessageHandler(&messageHandler);
     if (sch.load(&fileSchema, QUrl::fromLocalFile(fileSchema.fileName()))==false)
     {
-        pattern.close();
-        fileSchema.close();
-        VException e(messageHandler.statusMessage());
+        VException e(messageHandler.StatusMessage());
         e.AddMoreInformation(tr("Could not load schema file '%1'.").arg(fileSchema.fileName()));
         throw e;
     }
@@ -266,15 +267,12 @@ void VAbstractConverter::ValidateXML(const QString &schema) const
 
     if (errorOccurred)
     {
-        pattern.close();
-        fileSchema.close();
-        VException e(messageHandler.statusMessage());
-        e.AddMoreInformation(tr("Validation error file %3 in line %1 column %2").arg(messageHandler.line())
-                             .arg(messageHandler.column()).arg(m_originalFileName));
+        VException e(messageHandler.StatusMessage());
+        e.AddMoreInformation(tr("Validation error file %3 in line %1 column %2").arg(messageHandler.Line())
+                             .arg(messageHandler.Column()).arg(m_originalFileName));
         throw e;
     }
-    pattern.close();
-    fileSchema.close();
+#endif // QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/libs/ifc/xml/vdomdocument.cpp b/src/libs/ifc/xml/vdomdocument.cpp
index 2b5fdbc04..9a63c474f 100644
--- a/src/libs/ifc/xml/vdomdocument.cpp
+++ b/src/libs/ifc/xml/vdomdocument.cpp
@@ -39,7 +39,11 @@
 #include "../exception/vexception.h"
 #include "../ifcdef.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <QAbstractMessageHandler>
+#include <QSourceLocation>
+#endif
+
 #include <QByteArray>
 #include <QDomNodeList>
 #include <QDomText>
@@ -47,7 +51,6 @@
 #include <QIODevice>
 #include <QMessageLogger>
 #include <QObject>
-#include <QSourceLocation>
 #include <QStringList>
 #include <QTemporaryFile>
 #include <QTextDocument>
diff --git a/src/libs/ifc/xml/vparsererrorhandler.cpp b/src/libs/ifc/xml/vparsererrorhandler.cpp
new file mode 100644
index 000000000..b2a4bbbeb
--- /dev/null
+++ b/src/libs/ifc/xml/vparsererrorhandler.cpp
@@ -0,0 +1,128 @@
+/************************************************************************
+ **
+ **  @file   vparsererrorhandler.cpp
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   8 2, 2023
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentina project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2023 Valentina project
+ **  <https://gitlab.com/smart-pattern/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+#include "vparsererrorhandler.h"
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+//---------------------------------------------------------------------------------------------------------------------
+QString VParserErrorHandler::StatusMessage() const
+{
+    QTextDocument doc;
+    doc.setHtml(m_description);
+    return doc.toPlainText();
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+qint64 VParserErrorHandler::Line() const
+{
+    return m_sourceLocation.line();
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+qint64 VParserErrorHandler::Column() const
+{
+    return m_sourceLocation.column();
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+// cppcheck-suppress unusedFunction
+void VParserErrorHandler::handleMessage(QtMsgType type, const QString &description, const QUrl &identifier,
+                                        const QSourceLocation &sourceLocation)
+{
+    Q_UNUSED(type)
+    Q_UNUSED(identifier)
+
+    m_messageType = type;
+    m_description = description;
+    m_sourceLocation = sourceLocation;
+}
+
+#else
+
+//---------------------------------------------------------------------------------------------------------------------
+auto VParserErrorHandler::StatusMessage() const -> QString
+{
+    return m_description;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+auto VParserErrorHandler::Line() const -> XMLFileLoc
+{
+    return m_line;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+auto VParserErrorHandler::Column() const -> XMLFileLoc
+{
+    return m_column;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VParserErrorHandler::handleMessage(const SAXParseException &ex)
+{
+    char* msg = XMLString::transcode(ex.getMessage());
+    m_description = QString(msg);
+    m_line = ex.getLineNumber();
+    m_column = ex.getColumnNumber();
+    m_hasError = true;
+    XMLString::release(&msg);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VParserErrorHandler::warning(const SAXParseException &ex)
+{
+    handleMessage(ex);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VParserErrorHandler::error(const SAXParseException &ex)
+{
+    handleMessage(ex);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VParserErrorHandler::fatalError(const SAXParseException &ex)
+{
+    handleMessage(ex);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VParserErrorHandler::resetErrors()
+{
+    m_description.clear();
+    m_line = 0;
+    m_column = 0;
+    m_hasError = false;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+auto VParserErrorHandler::HasError() const -> bool
+{
+    return m_hasError;
+}
+
+#endif // QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
diff --git a/src/libs/ifc/xml/vparsererrorhandler.h b/src/libs/ifc/xml/vparsererrorhandler.h
new file mode 100644
index 000000000..29e9d02db
--- /dev/null
+++ b/src/libs/ifc/xml/vparsererrorhandler.h
@@ -0,0 +1,86 @@
+/************************************************************************
+ **
+ **  @file   vparsererrorhandler.h
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   8 2, 2023
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentina project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2023 Valentina project
+ **  <https://gitlab.com/smart-pattern/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+#ifndef VPARSERERRORHANDLER_H
+#define VPARSERERRORHANDLER_H
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#include <QAbstractMessageHandler>
+#include <QSourceLocation>
+
+//This class need for validation pattern file using XSD shema
+class VParserErrorHandler : public QAbstractMessageHandler
+{
+public:
+    VParserErrorHandler() =default;
+
+    QString StatusMessage() const;
+    qint64  Line() const;
+    qint64  Column() const;
+protected:
+    // cppcheck-suppress unusedFunction
+    virtual void handleMessage(QtMsgType type, const QString &description,
+                               const QUrl &identifier, const QSourceLocation &sourceLocation) override;
+private:
+    QtMsgType       m_messageType{};
+    QString         m_description{};
+    QSourceLocation m_sourceLocation{};
+};
+
+#else
+
+#include <xercesc/sax/ErrorHandler.hpp>
+#include <xercesc/sax/SAXParseException.hpp>
+
+XERCES_CPP_NAMESPACE_USE
+
+class VParserErrorHandler : public ErrorHandler
+{
+public:
+    QString StatusMessage() const;
+    XMLFileLoc Line() const;
+    XMLFileLoc Column() const;
+
+    void warning(const SAXParseException& ex) override;
+    void error(const SAXParseException& ex) override;
+    void fatalError(const SAXParseException& ex) override;
+    void resetErrors() override;
+
+    bool HasError() const;
+
+private:
+    XMLFileLoc m_line{0};
+    XMLFileLoc m_column{0};
+    QString    m_description{};
+    bool       m_hasError{false};
+
+    void handleMessage(const SAXParseException& ex);
+};
+
+#endif // QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+
+#endif // VPARSERERRORHANDLER_H
diff --git a/src/libs/ifc/xml/xml.pri b/src/libs/ifc/xml/xml.pri
index c142d3cd4..0b78e5809 100644
--- a/src/libs/ifc/xml/xml.pri
+++ b/src/libs/ifc/xml/xml.pri
@@ -15,7 +15,8 @@ HEADERS += \
     $$PWD//vvitconverter.h \
     $$PWD//vabstractmconverter.h \
     $$PWD/vlabeltemplateconverter.h \
-    $$PWD/vwatermarkconverter.h
+    $$PWD/vwatermarkconverter.h \
+    $$PWD/vparsererrorhandler.h
 
 SOURCES += \
     $$PWD/utils.cpp \
@@ -31,4 +32,5 @@ SOURCES += \
     $$PWD//vvitconverter.cpp \
     $$PWD//vabstractmconverter.cpp \
     $$PWD/vlabeltemplateconverter.cpp \
-    $$PWD/vwatermarkconverter.cpp
+    $$PWD/vwatermarkconverter.cpp \
+    $$PWD/vparsererrorhandler.cpp