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diff --git a/sc/inc/datamapper.hxx b/sc/inc/datamapper.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_SC_INC_EXTERNALDATAMAPPER_HXX
+#define INCLUDED_SC_INC_EXTERNALDATAMAPPER_HXX
+
+#include <vector>
+
+#include "scdllapi.h"
+
+#include <rtl/ustring.hxx>
+
+#include "orcusxml.hxx"
+
+class ScDocument;
+
+namespace sc {
+
+class ScDBDataManager;
+class DataProvider;
+class DataTransformation;
+
+class SC_DLLPUBLIC ExternalDataSource
+{
+private:
+
+    /**
+     * The URL for the external data provider. The URL
+     * will be passed to the data provider together with
+     * the ID.
+     *
+     * A data provider may decide to ignore the URL string.
+     */
+    OUString maURL;
+
+    /**
+     * The data provider is a unique identifier that will
+     * allow to identify and instantiate the required data
+     * provider.
+     *
+     * Examples for the internal data providers are:
+     *
+     * org.libreoffice.dataprovider.calc.csv
+     * org.libreoffice.dataprovider.calc.json
+     *
+     * Only internal data providers should use the:
+     * "org.libreoffice.dataprovider prefix".
+     */
+    OUString maProvider;
+
+    /**
+     * The ID allows the same data provider to support different
+     * data streams.
+     *
+     * A data provider may decide to ignore the ID string.
+     */
+    OUString maID;
+
+    ScOrcusImportXMLParam maParam;
+
+    std::shared_ptr<DataProvider> mpDataProvider;
+    std::shared_ptr<ScDBDataManager> mpDBDataManager;
+
+    std::vector<std::shared_ptr<sc::DataTransformation>> maDataTransformations;
+
+    ScDocument* mpDoc;
+
+public:
+
+    ExternalDataSource(const OUString& rURL,
+            const OUString& rProvider, ScDocument* pDoc);
+
+    void setUpdateFrequency(double nUpdateFrequency);
+
+    void setID(const OUString& rID);
+    void setURL(const OUString& rURL);
+    void setProvider(const OUString& rProvider);
+    void setXMLImportParam(const ScOrcusImportXMLParam& rParam);
+
+    const OUString& getURL() const;
+    const OUString& getProvider() const;
+    const OUString& getID() const;
+    const ScOrcusImportXMLParam& getXMLImportParam() const;
+    static double getUpdateFrequency();
+    OUString getDBName() const;
+    void setDBData(const OUString& rDBName);
+    ScDBDataManager* getDBManager();
+
+    void refresh(ScDocument* pDoc, bool bDeterministic = false);
+
+    void AddDataTransformation(const std::shared_ptr<sc::DataTransformation>& mpDataTransformation);
+    const std::vector<std::shared_ptr<sc::DataTransformation>>& getDataTransformation() const;
+};
+
+class SC_DLLPUBLIC ExternalDataMapper
+{
+    //ScDocument* mpDoc;
+    std::vector<ExternalDataSource> maDataSources;
+
+public:
+    ExternalDataMapper(ScDocument* pDoc);
+
+    ~ExternalDataMapper();
+
+    void insertDataSource(const ExternalDataSource& rSource);
+
+    const std::vector<ExternalDataSource>& getDataSources() const;
+    std::vector<ExternalDataSource>& getDataSources();
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */