<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
	<xs:include schemaLocation="fmi2Annotation.xsd"/>
	<xs:include schemaLocation="fmi2AttributeGroups.xsd"/>
	<xs:annotation>
		<xs:documentation>
Copyright(c) 2008-2011 MODELISAR consortium,
             2012-2024 Modelica Association Project "FMI".
             All rights reserved.

This schema file is part of the FMI 2.0.5 standard.

This file is licensed by the copyright holders under the 2-Clause BSD License
(https://opensource.org/licenses/BSD-2-Clause):

----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------
    </xs:documentation>
	</xs:annotation>
	<xs:complexType name="fmi2ScalarVariable">
		<xs:annotation>
			<xs:documentation>Properties of a scalar variable</xs:documentation>
		</xs:annotation>
		<xs:sequence>
			<xs:choice>
				<xs:element name="Real">
					<xs:complexType>
						<xs:attribute name="declaredType" type="xs:normalizedString">
							<xs:annotation>
								<xs:documentation>If present, name of type defined with TypeDefinitions / SimpleType providing defaults.</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attributeGroup ref="fmi2RealAttributes"/>
						<xs:attribute name="start" type="xs:double">
							<xs:annotation>
								<xs:documentation>Value before initialization, if initial=exact or approx.
max >= start >= min required</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="derivative" type="xs:unsignedInt">
							<xs:annotation>
								<xs:documentation>If present, this variable is the derivative of variable with ScalarVariable index "derivative".</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="reinit" type="xs:boolean" use="optional" default="false">
							<xs:annotation>
								<xs:documentation>Only for ModelExchange and if variable is a continuous-time state:
If true, state can be reinitialized at an event by the FMU
If false, state will never be reinitialized at an event by the FMU</xs:documentation>
							</xs:annotation>
						</xs:attribute>
					</xs:complexType>
				</xs:element>
				<xs:element name="Integer">
					<xs:complexType>
						<xs:attribute name="declaredType" type="xs:normalizedString">
							<xs:annotation>
								<xs:documentation>If present, name of type defined with TypeDefinitions / SimpleType providing defaults.</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attributeGroup ref="fmi2IntegerAttributes"/>
						<xs:attribute name="start" type="xs:int">
							<xs:annotation>
								<xs:documentation>Value before initialization, if initial=exact or approx.
max >= start >= min required</xs:documentation>
							</xs:annotation>
						</xs:attribute>
					</xs:complexType>
				</xs:element>
				<xs:element name="Boolean">
					<xs:complexType>
						<xs:attribute name="declaredType" type="xs:normalizedString">
							<xs:annotation>
								<xs:documentation>If present, name of type defined with TypeDefinitions / SimpleType providing defaults.</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="start" type="xs:boolean">
							<xs:annotation>
								<xs:documentation>Value before initialization, if initial=exact or approx</xs:documentation>
							</xs:annotation>
						</xs:attribute>
					</xs:complexType>
				</xs:element>
				<xs:element name="String">
					<xs:complexType>
						<xs:attribute name="declaredType" type="xs:normalizedString">
							<xs:annotation>
								<xs:documentation>If present, name of type defined with TypeDefinitions / SimpleType providing defaults.</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="start" type="xs:string">
							<xs:annotation>
								<xs:documentation>Value before initialization, if initial=exact or approx</xs:documentation>
							</xs:annotation>
						</xs:attribute>
					</xs:complexType>
				</xs:element>
				<xs:element name="Enumeration">
					<xs:complexType>
						<xs:attribute name="declaredType" type="xs:normalizedString" use="required">
							<xs:annotation>
								<xs:documentation>Name of type defined with TypeDefinitions / SimpleType </xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="quantity" type="xs:normalizedString"/>
						<xs:attribute name="min" type="xs:int"/>
						<xs:attribute name="max" type="xs:int">
							<xs:annotation>
								<xs:documentation>max >= min required</xs:documentation>
							</xs:annotation>
						</xs:attribute>
						<xs:attribute name="start" type="xs:int">
							<xs:annotation>
								<xs:documentation>Value before initialization, if initial=exact or approx.
max >= start >= min required</xs:documentation>
							</xs:annotation>
						</xs:attribute>
					</xs:complexType>
				</xs:element>
			</xs:choice>
			<xs:element name="Annotations" type="fmi2Annotation" minOccurs="0">
				<xs:annotation>
					<xs:documentation>Additional data of the scalar variable, e.g., for the dialog menu or the graphical layout</xs:documentation>
				</xs:annotation>
			</xs:element>
		</xs:sequence>
		<xs:attribute name="name" type="xs:normalizedString" use="required">
			<xs:annotation>
				<xs:documentation>Identifier of variable, e.g. "a.b.mod[3,4].'#123'.c". "name" must be unique with respect to all other elements of the ModelVariables list</xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="valueReference" type="xs:unsignedInt" use="required">
			<xs:annotation>
				<xs:documentation>Identifier for variable value in FMI2 function calls (not necessarily unique with respect to all variables)</xs:documentation>
			</xs:annotation>
		</xs:attribute>
		<xs:attribute name="description" type="xs:string"/>
		<xs:attribute name="causality" default="local">
			<xs:annotation>
				<xs:documentation>parameter: independent parameter
calculatedParameter: calculated parameter
input/output: can be used in connections
local: variable calculated from other variables
independent: independent variable (usually time)</xs:documentation>
			</xs:annotation>
			<xs:simpleType>
				<xs:restriction base="xs:normalizedString">
					<xs:enumeration value="parameter"/>
					<xs:enumeration value="calculatedParameter"/>
					<xs:enumeration value="input"/>
					<xs:enumeration value="output"/>
					<xs:enumeration value="local"/>
					<xs:enumeration value="independent"/>
				</xs:restriction>
			</xs:simpleType>
		</xs:attribute>
		<xs:attribute name="variability" default="continuous">
			<xs:annotation>
				<xs:documentation>constant: value never changes
fixed: value fixed after initialization
tunable: value constant between external events
discrete: value constant between internal events
continuous: no restriction on value changes</xs:documentation>
			</xs:annotation>
			<xs:simpleType>
				<xs:restriction base="xs:normalizedString">
					<xs:enumeration value="constant"/>
					<xs:enumeration value="fixed"/>
					<xs:enumeration value="tunable"/>
					<xs:enumeration value="discrete"/>
					<xs:enumeration value="continuous"/>
				</xs:restriction>
			</xs:simpleType>
		</xs:attribute>
		<xs:attribute name="initial">
			<xs:annotation>
				<xs:documentation>exact: initialized with start value
approx: iteration variable that starts with start value
calculated: calculated from other variables.
If not provided, initial is deduced from causality and variability (details see specification)</xs:documentation>
			</xs:annotation>
			<xs:simpleType>
				<xs:restriction base="xs:normalizedString">
					<xs:enumeration value="exact"/>
					<xs:enumeration value="approx"/>
					<xs:enumeration value="calculated"/>
				</xs:restriction>
			</xs:simpleType>
		</xs:attribute>
		<xs:attribute name="canHandleMultipleSetPerTimeInstant" type="xs:boolean">
			<xs:annotation>
				<xs:documentation>Only for ModelExchange and only for variables with variability = "input":
If present with value = false, then only one fmi2SetXXX call is allowed at one super dense time instant. In other words, this input is not allowed to appear in an algebraic loop.</xs:documentation>
			</xs:annotation>
		</xs:attribute>
	</xs:complexType>
</xs:schema>
