diff --git a/core/include/Settings/SqpSettingsDefs.h b/core/include/Settings/SqpSettingsDefs.h
new file mode 100644
index 0000000..5d110fe
--- /dev/null
+++ b/core/include/Settings/SqpSettingsDefs.h
@@ -0,0 +1,18 @@
+#ifndef SCIQLOP_SQPSETTINGSDEFS_H
+#define SCIQLOP_SQPSETTINGSDEFS_H
+
+#include "CoreGlobal.h"
+
+#include <QString>
+
+// //////////////// //
+// General settings //
+// //////////////// //
+
+extern SCIQLOP_CORE_EXPORT const QString GENERAL_TOLERANCE_AT_INIT_KEY;
+extern SCIQLOP_CORE_EXPORT const double GENERAL_TOLERANCE_AT_INIT_DEFAULT_VALUE;
+
+extern SCIQLOP_CORE_EXPORT const QString GENERAL_TOLERANCE_AT_UPDATE_KEY;
+extern SCIQLOP_CORE_EXPORT const double GENERAL_TOLERANCE_AT_UPDATE_DEFAULT_VALUE;
+
+#endif // SCIQLOP_SQPSETTINGSDEFS_H
diff --git a/core/src/Settings/SqpSettingsDefs.cpp b/core/src/Settings/SqpSettingsDefs.cpp
new file mode 100644
index 0000000..f0f6b44
--- /dev/null
+++ b/core/src/Settings/SqpSettingsDefs.cpp
@@ -0,0 +1,7 @@
+#include "Settings/SqpSettingsDefs.h"
+
+const QString GENERAL_TOLERANCE_AT_INIT_KEY = QStringLiteral("toleranceInit");
+const double GENERAL_TOLERANCE_AT_INIT_DEFAULT_VALUE = 0.2;
+
+const QString GENERAL_TOLERANCE_AT_UPDATE_KEY = QStringLiteral("toleranceUpdate");
+const double GENERAL_TOLERANCE_AT_UPDATE_DEFAULT_VALUE = 0.2;