--- /dev/null
+/*
+ Copyright (C) 2012 Modelon AB
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the BSD style license.
+
+ This program 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
+ FMILIB_License.txt file for more details.
+
+ You should have received a copy of the FMILIB_License.txt file
+ along with this program. If not, contact Modelon AB <http://www.modelon.com>.
+*/
+
+/** \file fmi2_xml_unit.h
+* \brief Public interface to the FMI XML C-library. Handling of variable units.
+*/
+
+#ifndef FMI2_XML_UNIT_H_
+#define FMI2_XML_UNIT_H_
+
+#include "fmi2_xml_model_description.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ /**
+ \addtogroup fmi2_xml
+ @{
+ \addtogroup fmi2_xml_units Functions for handling unit definitions.
+ @}
+ \addtogroup fmi2_xml_units Functions for handling unit definitions.
+ @{
+ */
+
+/** \brief Get a list of all the unit definitions */
+fmi2_xml_unit_definitions_t* fmi2_xml_get_unit_definitions(fmi2_xml_model_description_t* md);
+unsigned int fmi2_xml_get_unit_definitions_number(fmi2_xml_unit_definitions_t*);
+fmi2_xml_unit_t* fmi2_xml_get_unit(fmi2_xml_unit_definitions_t*, unsigned int index);
+
+const char* fmi2_xml_get_unit_name(fmi2_xml_unit_t*);
+unsigned int fmi2_xml_get_unit_display_unit_number(fmi2_xml_unit_t*);
+fmi2_xml_display_unit_t* fmi2_xml_get_unit_display_unit(fmi2_xml_unit_t*, size_t index);
+
+/**
+ \brief Get fmi2_SI_base_units_Num SI base units exponents associated with the unit.
+*/
+const int* fmi2_xml_get_SI_unit_exponents(fmi2_xml_unit_t*);
+
+/**
+ \brief Get factor to the corresponding SI base units.
+*/
+double fmi2_xml_get_SI_unit_factor(fmi2_xml_unit_t*);
+
+/**
+ \brief Get offset to the corresponding SI base units.
+*/
+double fmi2_xml_get_SI_unit_offset(fmi2_xml_unit_t*);
+
+/**
+ \brief Convert a value with respect to the unit to the
+ value with respect to the SI base unit.
+*/
+double fmi2_xml_convert_to_SI_base_unit(double, fmi2_xml_unit_t*);
+
+/**
+ \brief Convert a value with respect to the SI base unit to the
+ value with respect to the unit.
+*/
+double fmi2_xml_convert_from_SI_base_unit(double, fmi2_xml_unit_t*);
+
+fmi2_xml_display_unit_t* fmi2_xml_get_type_display_unit(fmi2_xml_real_typedef_t*);
+fmi2_xml_unit_t* fmi2_xml_get_base_unit(fmi2_xml_display_unit_t*);
+const char* fmi2_xml_get_display_unit_name(fmi2_xml_display_unit_t*);
+double fmi2_xml_get_display_unit_factor(fmi2_xml_display_unit_t*);
+double fmi2_xml_get_display_unit_offset(fmi2_xml_display_unit_t*);
+
+double fmi2_xml_convert_to_display_unit(double, fmi2_xml_display_unit_t*, int isRelativeQuantity);
+double fmi2_xml_convert_from_display_unit(double, fmi2_xml_display_unit_t*, int isRelativeQuantity);
+/**
+@}
+*/
+#ifdef __cplusplus
+}
+#endif
+#endif