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diff --git a/src/tellico_kernel.h b/src/tellico_kernel.h
new file mode 100644
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+++ b/src/tellico_kernel.h
@@ -0,0 +1,145 @@
+/***************************************************************************
+    copyright            : (C) 2003-2006 by Robby Stephenson
+    email                : [email protected]
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of version 2 of the GNU General Public License as  *
+ *   published by the Free Software Foundation;                            *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef TELLICO_KERNEL_H
+#define TELLICO_KERNEL_H
+
+#include "datavectors.h"
+#include "borrower.h"
+
+#include <kcommand.h>
+
+class KURL;
+
+class QWidget;
+class QString;
+class QStringList;
+
+namespace Tellico {
+  class MainWindow;
+  class Filter;
+  namespace Command {
+    class Group;
+  }
+  namespace Data {
+    class Collection;
+  }
+
+/**
+ * @author Robby Stephenson
+ */
+class Kernel {
+
+public:
+  static Kernel* self() { return s_self; }
+  /**
+   * Initializes the singleton. Should just be called once, from Tellico::MainWindow
+   */
+  static void init(MainWindow* parent) { if(!s_self) s_self = new Kernel(parent); }
+
+  /**
+   * Returns a pointer to the parent widget. This is mainly used for error dialogs and the like.
+   *
+   * @return The widget pointer
+   */
+  QWidget* widget() { return m_widget; }
+
+  /**
+   * Returns the url of the current document.
+   *
+   * @return The URL
+   */
+  const KURL& URL() const;
+  /**
+   * Returns a list of the field titles, wraps the call to the collection itself.
+   *
+   * @return the field titles
+   */
+  const QStringList& fieldTitles() const;
+  /**
+   * Returns the name of an field, given its title. Wraps the call to the collection itself.
+   *
+   * @param title The field title
+   * @return The field name
+   */
+  QString fieldNameByTitle(const QString& title) const;
+  /**
+   * Returns the title of an field, given its name. Wraps the call to the collection itself.
+   *
+   * @param name The field name
+   * @return The field title
+   */
+  QString fieldTitleByName(const QString& name) const;
+  QStringList valuesByFieldName(const QString& name) const;
+
+  int collectionType() const;
+  QString collectionTypeName() const;
+
+  void sorry(const QString& text, QWidget* widget=0);
+
+  void beginCommandGroup(const QString& name);
+  void endCommandGroup();
+  void resetHistory();
+
+  bool addField(Data::FieldPtr field);
+  bool modifyField(Data::FieldPtr field);
+  bool removeField(Data::FieldPtr field);
+
+  void addEntries(Data::EntryVec entries, bool checkFields);
+  void modifyEntries(Data::EntryVec oldEntries, Data::EntryVec newEntries);
+  void updateEntry(Data::EntryPtr oldEntry, Data::EntryPtr newEntry, bool overWrite);
+  void removeEntries(Data::EntryVec entries);
+
+  bool addLoans(Data::EntryVec entries);
+  bool modifyLoan(Data::LoanPtr loan);
+  bool removeLoans(Data::LoanVec loans);
+
+  void addFilter(FilterPtr filter);
+  bool modifyFilter(FilterPtr filter);
+  bool removeFilter(FilterPtr filter);
+
+  void reorderFields(const Data::FieldVec& fields);
+
+  void appendCollection(Data::CollPtr coll);
+  void mergeCollection(Data::CollPtr coll);
+  void replaceCollection(Data::CollPtr coll);
+
+  // adds new fields into collection if any values in entries are not empty
+  // first object is modified fields, second is new fields
+  QPair<Data::FieldVec, Data::FieldVec> mergeFields(Data::CollPtr coll,
+                                                    Data::FieldVec fields,
+                                                    Data::EntryVec entries);
+
+  void renameCollection();
+  const KCommandHistory* commandHistory() { return &m_commandHistory; }
+
+  int askAndMerge(Data::EntryPtr entry1, Data::EntryPtr entry2, Data::FieldPtr field,
+                  QString value1 = QString(), QString value2 = QString());
+
+private:
+  static Kernel* s_self;
+
+  // all constructors are private
+  Kernel(MainWindow* parent);
+  Kernel(const Kernel&);
+  Kernel& operator=(const Kernel&);
+
+  void doCommand(KCommand* command);
+
+  QWidget* m_widget;
+  KCommandHistory m_commandHistory;
+  Command::Group* m_commandGroup;
+};
+
+} // end namespace
+#endif