xmml.xsd

<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="external/xs3p-1/xs3p.xsl"?>
<schema
  xmlns="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.mapper-project.eu/xmml"
  xmlns:xmml="http://www.mapper-project.eu/xmml"
  elementFormDefault="qualified">

	<annotation><documentation>
		Specification of the XML representation of the Multiscale Modeling Language
	  (xMML). For more information, visit http://www.mapper-project.eu/.
	  
	  Every element may be appended with any attributes, and the extra and description
	  elements also take any element as their children.
	</documentation></annotation>

  <!-- Element definitions -->
  
	<element name="model">
	  <annotation><documentation>
	    Root element of a multiscale model.
	  </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:description" minOccurs="0" maxOccurs="1"/>
				<element ref="xmml:definitions"/>
				<element ref="xmml:topology"/>
			</sequence>
			<attribute name="id" type="NCName" use="required"/>
			<attribute name="name" type="string"/>
			<attribute name="version" type="string"/>
			<attribute name="xmml_version" fixed="0.4" type="xmml:version"/>
			<anyAttribute processContents="lax"/>
		</complexType>
  
		<unique name="datatypeId">
			<selector xpath="xmml:definitions/xmml:datatype"/>
			<field xpath="@id"/>
		</unique>
		<unique name="mapperId">
			<selector xpath="xmml:definitions/xmml:mapper"/>
			<field xpath="@id"/>
		</unique>
		<unique name="terminalId">
			<selector xpath="xmml:definitions/xmml:terminal"/>
			<field xpath="@id"/>
		</unique>
		<unique name="submodelId">
			<selector xpath="xmml:definitions/xmml:submodel"/>
			<field xpath="@id"/>
		</unique>
		<unique name="filterId">
			<selector xpath="xmml:definitions/xmml:filter"/>
			<field xpath="@id"/>
		</unique>
		<unique name="instanceId">
			<selector xpath="xmml:topology/xmml:instance"/>
			<field xpath="@id"/>
		</unique>
		
		<keyref name="datatypeInIdRef" refer="xmml:datatypeId">
		  <selector xpath="xmml:definitions/xmml:filter"/>
		  <field xpath="@datatype_in"/>
	  </keyref>
		<keyref name="datatypeOutIdRef" refer="xmml:datatypeId">
		  <selector xpath="xmml:definitions/xmml:filter"/>
		  <field xpath="@datatype_out"/>
	  </keyref>
		<keyref name="datatypePortIdRef" refer="xmml:datatypeId">
		  <selector xpath="xmml:definitions/xmml:*/xmml:ports/xmml:*"/>
		  <field xpath="@datatype"/>
	  </keyref>
		<keyref name="mapperIdRef" refer="xmml:mapperId">
		  <selector xpath="xmml:topology/xmml:instance"/>
		  <field xpath="@mapper"/>
	  </keyref>
		<keyref name="terminalIdRef" refer="xmml:terminalId">
		  <selector xpath="xmml:topology/xmml:instance"/>
		  <field xpath="@terminal"/>
	  </keyref>
		<keyref name="submodelIdRef" refer="xmml:submodelId">
		  <selector xpath="xmml:topology/xmml:instance"/>
		  <field xpath="@submodel"/>
	  </keyref>
		<keyref name="filterIdRef" refer="xmml:filterId">
		  <selector xpath="xmml:topology/xmml:coupling/xmml:apply"/>
		  <field xpath="@filter"/>
	  </keyref>
	</element>

	<element name="description" type="xmml:anyContent">
	  <annotation><documentation>
	    A short textual description of the parent element.
	  </documentation></annotation>
	</element>

	<element name="definitions">
	  <annotation><documentation>
	    Type definitions within the model.
	  </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:datatype" minOccurs="0" maxOccurs="unbounded"/>
				<choice minOccurs="0" maxOccurs="unbounded">
					<element ref="xmml:terminal"/>
					<element ref="xmml:filter"/>
					<element ref="xmml:mapper"/>
					<element ref="xmml:submodel"/>
				</choice>
			</sequence>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="datatype">
	  <annotation><documentation>
	    A datatype definition.
	  </documentation></annotation>
		<complexType><complexContent>
		  <extension base="xmml:definition">
  			<attribute name="size_estimate" type="xmml:formula">
  			  <annotation><documentation>
  			    A function in terms of the scales and params of the
  			    submodel it originated from.
  			  </documentation></annotation></attribute>
  			<attribute name="extends" type="string">
  			  <annotation><documentation>
  			    Possibility to extend another datatype, such that
                all information in the inherited datatype is also
                available in the current datatype.
              </documentation></annotation></attribute>
			</extension>
		</complexContent></complexType>
		<keyref name="datatypeExtendsInIdRef" refer="xmml:datatypeId">
		  <selector xpath="xmml:datatype"/>
		  <field xpath="@extends"/>
	  </keyref>
	</element>

	<element name="filter">
	  <annotation><documentation>
	    A conduit filter, filtering a type of data and either converting it to
      another type of data, or reducing the data over a dimension with a
      certain factor, or interpolating in that dimension.
    </documentation></annotation>
		<complexType><complexContent>
		  <extension base="xmml:definition">
  			<sequence>
  				<element ref="xmml:description" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:implementation" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
  			</sequence>
  			<attribute name="datatype_in" type="NCName"><annotation><documentation>
				  Data type that the filter accepts as input.
				 </documentation></annotation></attribute>
  			<attribute name="datatype_out" type="NCName"><annotation><documentation>
 				  Data type that the filter will give as output.
 				 </documentation></annotation></attribute>
  			<attribute name="type" use="required"><annotation><documentation>
  				  Type of action that the filter will do. Interpolation produces more
  				  output messages than input messages by some form of interpolation.
  				  Reduction produces less messages than it receives. And finally, a
  				  converter only alters the messages that it receives.
  				 </documentation></annotation>
  				<simpleType>
  					<restriction base="NCName">
  						<enumeration value="interpolation"/>
  						<enumeration value="reduction"/>
  						<enumeration value="converter"/>
  					</restriction>
  				</simpleType>
  			</attribute>
  			<attribute name="dimension" type="string"><annotation><documentation>
  				  The dimension over which the filter is applied. Use either the id
  				  or the name of the dimension.
  				 </documentation></annotation></attribute>
  			<attribute name="factor" type="xmml:formula"><annotation><documentation>
 				  The filter may take a single argument, often a factor.
 				 </documentation></annotation></attribute>
  		</extension>
		</complexContent></complexType>
		<unique name="filterParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="terminal">
	  <annotation><documentation>
            A terminal connection, either a source or a sink. This can pass predefined parameters
            or file contents, or simply empty data structures. It is allowed to have a single port.
          </documentation></annotation>
		<complexType><complexContent>
		  <extension base="xmml:computationalElement">
  			<sequence>
  				<element ref="xmml:description" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:ports"/>
  				<element ref="xmml:implementation" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
  			</sequence>
  			<attribute name="type" use="required">
  				<simpleType>
  					<restriction base="NCName">
  						<enumeration value="source"/>
  						<enumeration value="sink"/>
  					</restriction>
  				</simpleType>
  			</attribute>
  		</extension>
		</complexContent></complexType>
		<unique name="terminalParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="mapper">
	  <annotation><documentation>
	    A fan-in, or fan-out, or fan-in-out mapper. If the type is fan-in, it may have multiple
      in ports and one out port, otherwise, one in port and multiple out ports.
      Implementation details may also be relevant. A fan-in mapper may have
      the same in port used for a submodel instance with a multiplicity, and
      conversely for the fan-out mapper. A filter with multiple inputs can be
      constructed as a fan-in mapper. In and out ports may not have an operator
      specified. A fan-in-out mapper may have multiple in- and out ports
      but still has the limitation that it needs all inputs to have a message,
      and then it sends one message to each output.
    </documentation></annotation>
		<complexType><complexContent>
		  <extension base="xmml:computationalElement">
  			<sequence>
  				<element ref="xmml:description" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:ports"/>
  				<element ref="xmml:implementation" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
  			</sequence>
  			<attribute name="type" use="required">
  				<simpleType>
  					<restriction base="NCName">
  						<enumeration value="fan-in"/>
  						<enumeration value="fan-out"/>
  						<enumeration value="fan-in-out"/>
  					</restriction>
  				</simpleType>
  			</attribute>
  		</extension>
		</complexContent></complexType>
		<unique name="mapperParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="submodel">
	  <annotation><documentation>
	    Definition of a single code of a single submodel. Attributes state whether
      the submodel should be started at initialization if this is ambiguous,
      whether it is stateful or not, or that it is optional but may bring some
      optimization, and whether user interaction is required while running
      the submodel.
    </documentation></annotation>
		<complexType><complexContent>
		  <extension base="xmml:computationalElement">
  			<sequence>
  				<element ref="xmml:description" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:timescale"/>
  				<element ref="xmml:spacescale" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:otherscale" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
  				<element ref="xmml:ports"/>
  				<element ref="xmml:implementation" minOccurs="0" maxOccurs="1"/>
  				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
  			</sequence>
  			<attribute name="name" type="string"><annotation><documentation>
				  A more descriptive name for the submodel, using any characters.
				 </documentation></annotation></attribute>
  			<attribute name="type" type="string"><annotation><documentation>
				  The generic type of submodel. Other submodels with the same type are
					interchangeable with the current one but may use different algorithms to achieve the same goal.
				 </documentation></annotation></attribute>
  			<attribute name="stateful" type="xmml:OptionalChoice" default="no"><annotation><documentation>
				  Whether the submodel has a state that should be preserved after finalization
				so that it can be used in initialization. Usually, this can be achieved
				by keeping the submodel active, but a runtime system may dictate that
				the submodel is responsible of storing and restoring its state between
				instantiations.
				 </documentation></annotation></attribute>
  		</extension>
		</complexContent></complexType>
		<unique name="submodelParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
		<unique name="submodelScaleName">
			<selector xpath="xmml:timescale | xmml:spacescale | t.otherscale"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="timescale" type="xmml:scale">
	  <annotation><documentation>
	    Temporal scale specification of a submodel. Using the attributes, it is a regular
	    scale, using child elements it is a full scale specification.
    </documentation></annotation>
	</element>

	<element name="spacescale" type="xmml:multiDimensionalScale">
		<annotation><documentation>
	    Spatial scale specification of a submodel. Using the attributes, it is a regular
	    scale, using child elements it is a full scale specification.
	    Either all spatial dimensions can be listed separately, or the number of
	    dimensions can be given as an attribute, using only one tag.
    </documentation></annotation>
	</element>

	<element name="otherscale">
		<annotation><documentation>
	    General scale specification of a submodel. Using the attributes, it is a regular
	    scale, using child elements it is a full scale specification.
	    Either all spatial dimensions can be listed separately, or the number of
	    dimensions can be given as an attribute, using only one tag.
    </documentation></annotation>
	  <complexType><complexContent>
	    <extension base="xmml:multiDimensionalScale">
			  <attribute name="type" type="string"/>
		  </extension>
		</complexContent></complexType>
	</element>

	<element name="param">
		<annotation><documentation>
	    Useful for specifying the size of a datatype, or stating a fundamental
       non-variable fact. It is not meant for completely parameterizing a
       submodel, since this should be done at time of execution.
    </documentation></annotation>
		<complexType>
			<sequence><element ref="xmml:description" minOccurs="0" maxOccurs="1"/></sequence>
			<attribute name="id" type="NCName" use="required"/>
			<attribute name="value" type="string" use="required"/>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="extra" type="xmml:anyContent">
	  <annotation><documentation>
	    Any information about an element not captured by any of the other tags.
      If this is used, possibly the information therein can also be included
      in the official format; if so, please contact me.
	  </documentation></annotation></element>

	<element name="ports">
	  <annotation><documentation>
	    All in and out ports of a computational element.
	    If the parent element is a submodel, the ports should include an SEL operator.
    </documentation></annotation>
		<complexType>
			<choice minOccurs="0" maxOccurs="unbounded">
      	<element name="in" type="xmml:port"/>
      	<element name="out" type="xmml:port"/>
			</choice>
		</complexType>
		<unique name="portId">
			<selector xpath="*"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="topology">
	  <annotation><documentation>
	    The instantiation of computational elements and the couplings between them.
    </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:instance" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:coupling" minOccurs="0" maxOccurs="unbounded"/>
			</sequence>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="instance">
	  <annotation><documentation>
  	  An instance of a submodel or mapper, by default using the same id as the
      element it instantiates. A submodel instance may override some of the scale
      information that was supplied in the submodel definition. Mappers may not
      specify a multiplicity or be stateful.
    </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:timescale" minOccurs="0" maxOccurs="1"/>
				<element ref="xmml:spacescale" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:otherscale" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
			</sequence>
			<attribute name="id" type="NCName"/>
			<attribute name="submodel" type="NCName"/>
			<attribute name="mapper" type="NCName"/>
			<attribute name="terminal" type="NCName"/>
			<attribute name="domain" type="xmml:domain"><annotation><documentation>
			  A domain name may be supplied, used to identify single domain interaction.
			  </documentation></annotation></attribute>
			<attribute name="init" type="xmml:YesNoChoice"/>
			<attribute name="interactive" type="xmml:OptionalChoice"/>
			<attribute name="stateful" type="xmml:OptionalChoice"/>
			<attribute name="multiplicity">
			  <annotation><documentation>
			    A multiplicity is a number that specifies how many instances should be
          created. If this argument is used and not 1, it should be connected
          using mappers. Alternatively, different instances can be addressed using
          array notation, for instance: instanceA[0].</documentation></annotation>
				<simpleType>
					<restriction base="NCName">
						<pattern value="[0-9]+|dynamic"/>
					</restriction>
				</simpleType>
			</attribute>
			<anyAttribute processContents="lax"/>
		</complexType>
		<unique name="instanceParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
	</element>

	<element name="coupling">
	  <annotation><documentation>
  	  A coupling from one submodel instance, mapper, or terminal to the other.
      Notation: instance1.outport to instance2.inport. .
    </documentation></annotation>
	  <complexType>
			<sequence>
				<element ref="xmml:apply" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
			</sequence>
			<attribute name="name" type="string"/>
			<attribute name="from" type="xmml:instancePort" use="required"/>
			<attribute name="to" type="xmml:instancePort" use="required"/>
			<attribute name="size" type="xmml:unit"><annotation><documentation>
			  Size can be specified if not already done in the datatypes.
			  </documentation></annotation></attribute>
			<attribute name="interactive" type="xmml:OptionalChoice" default="no">
			    <annotation><documentation>
  			  Whether the data that is sent through the conduit must be evaluated manually
          before it can be passed to the next.</documentation></annotation></attribute>
			<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="apply">
	  <annotation><documentation>
  	  Specify filters that will be applied to the conduit. The order that they
      are specified in is preserved.
    </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:param" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:extra" minOccurs="0" maxOccurs="unbounded"/>
			</sequence>
			<attribute name="filter" type="NCName" use="required"/>
			<attribute name="factor" type="xmml:formula"><annotation><documentation>
			  Overrides the factor belonging to the filter.
			  </documentation></annotation></attribute>
			<anyAttribute processContents="lax"/>
		</complexType>
		<unique name="applyParamId">
			<selector xpath="xmml:param"/>
			<field xpath="@id"/>
		</unique>
	</element>
 
  <!-- Implementation details -->
  
	<element name="implementation">
	  <annotation><documentation>
	    Implementation details of the submodel.
	  </documentation></annotation>
		<complexType>
			<sequence>
				<element ref="xmml:interpreter" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:platform" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:library" minOccurs="0" maxOccurs="unbounded"/>
				<element ref="xmml:code" minOccurs="0" maxOccurs="unbounded"/>
			</sequence>
			<attribute name="size" type="xmml:unit"><annotation><documentation>
			  Size of the compiled code.
			  </documentation></annotation></attribute>
			<attribute name="runtime" type="xmml:unit"><annotation><documentation>
			  Estimated typical runtime on the preferred platform.
			  </documentation></annotation></attribute>
			<attribute name="memory" type="xmml:unit"><annotation><documentation>
				  Amount of memory that is needed for a simulation.</documentation></annotation></attribute>
			<attribute name="cores" type="positiveInteger"><annotation><documentation>
			  Number of cores that are typically needed for a simulation.</documentation></annotation></attribute>
			<attribute name="language" type="string"><annotation><documentation>
			  The programming language that is used.</documentation></annotation></attribute>
			<attribute name="path" type="string">	<annotation><documentation>
				 The path to the code.</documentation></annotation></attribute>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="interpreter">
		<complexType>
			<attribute name="name" type="string"/>
			<attribute name="path" type="string"/>
			<attribute name="version" type="string"/>
			<attribute name="flags" type="string"/>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="platform">
		<complexType>
			<attribute name="arch" type="string"/>
			<attribute name="os" type="string" use="required"/>
			<attribute name="preferred" type="xmml:YesNoChoice"/>
  		<anyAttribute processContents="lax"/>
		</complexType>
	</element>

	<element name="library">
		<complexType>
			<attribute name="name" type="string" use="required"/>
			<attribute name="path" type="string"/>
			<anyAttribute processContents="lax"/>
		</complexType>
	</element>
	
	<element name="code">
	  <annotation><documentation>
	    Store the code of an implementation in some specification language.
			Inside, any XML or text may be used, although for special characters, use
			the CDATA directive. The language is the input language for the actual
			code, which should be of the language specified in the 
	  </documentation></annotation>
		<complexType>
			<complexContent>
				<extension base="xmml:anyContent">
					<attribute name="language" type="string" use="required"/>
					<attribute name="version" type="string"/>
					<attribute name="part" type="string"/>
					<attribute name="compiler" type="string"/>
					<attribute name="compilerflags" type="string"/>
					<anyAttribute processContents="lax"/>
				</extension>
			</complexContent>
		</complexType>
	</element>
	
	<!-- Shared attributes -->
	
	<complexType name="scale">
		<sequence>
			<element name="delta" type="xmml:range" minOccurs="0" maxOccurs="1"/>
			<element name="total" type="xmml:range" minOccurs="0" maxOccurs="1"/>
		</sequence>
		<attribute name="id" type="NCName"/>
		<attribute name="delta" type="xmml:unit"/>
		<attribute name="total" type="xmml:unit"/>
		<attribute name="characteristic" type="xmml:unit"/>
		<anyAttribute processContents="lax"/>
	</complexType>
 
 	<complexType name="multiDimensionalScale"><complexContent>
    <extension base="xmml:scale">
		  <attribute name="dimensions" type="positiveInteger"/>
	  </extension></complexContent>
	</complexType>
 
  <complexType name="definition">
    <annotation><documentation>
      Represent an implemented entity.
    </documentation></annotation>
		<attribute name="id" type="NCName" use="required"/>
		<attribute name="class" type="string"/>
		<attribute name="version" type="string"/>
		<anyAttribute processContents="lax"/>		
  </complexType>

  <complexType name="computationalElement">
    <annotation><documentation>
      Represent a computational element.
    </documentation></annotation>
    <complexContent><extension base="xmml:definition">
      <attribute name="init" type="xmml:YesNoChoice" default="no"/>
			<attribute name="interactive" type="xmml:OptionalChoice" default="no"/>
    </extension></complexContent>
  </complexType>

  <!-- Shared options -->
  
	<simpleType name="YesNoChoice">
		<annotation>
	    <documentation>A choice between yes and no.</documentation>
	  </annotation>
    <restriction base="NCName">
			<enumeration value="yes"/>
			<enumeration value="no"/>
		</restriction>
	</simpleType>
	<simpleType name="OptionalChoice">
	  <annotation>
	    <documentation>An `optional' option added to yes-no
	      choice.</documentation>
	  </annotation>
		<restriction base="NCName">
			<enumeration value="yes"/>
			<enumeration value="no"/>
			<enumeration value="optional"/>
		</restriction>
	</simpleType>
	<simpleType name="SEL">
	  <annotation><documentation>
	    Operators in a submodel execution loop.
	  </documentation></annotation>
	  <restriction base="NCName">
			<enumeration value="finit"/>
			<enumeration value="Oi"/>
			<enumeration value="S"/>
			<enumeration value="B"/>
			<enumeration value="Of"/>
		</restriction>
	</simpleType>
 
  <!-- Enforce specific contents of xMML attributes -->
  
	<simpleType name="unit">
		<annotation>
	    <documentation>
	      An SI unit, written in scientific notation, but also accepting bits, bytes,
	      and human-readable time indication. Conformance is evaluated with pattern
	      `-?[0-9.]+([eE]-?[0-9]+)?\s*\w*'.
	    </documentation>
	  </annotation>
		<restriction base="string">
			<whiteSpace value="collapse"/>
			<pattern value="-?[0-9.]+([eE]-?[0-9]+)?\s*\w*"/>
		</restriction>
	</simpleType>

	<simpleType name="instancePort">
	  <annotation><documentation>
	    The port of an instance, indicated as `instance.port'.
    </documentation></annotation>		
		<restriction base="string">
			<pattern value="(\p{Pc}|\p{Pd}|\p{L}|\p{N})+\.(\p{Pc}|\p{Pd}|\p{L}|\p{N})+"/>
		</restriction>
	</simpleType>

	<simpleType name="domain">
	  <annotation><documentation>
	      A domain and all its super-domains, separated by periods like
	      `domain.subdomain.subsubdomain'.
	    </documentation>
	  </annotation>
		<restriction base="string">
			<pattern value="(\p{Pc}|\p{Pd}|\p{L}|\p{N})+(\.(\p{Pc}|\p{Pd}|\p{L}|\p{N})+)*"/>
		</restriction>
	</simpleType>
	
	<simpleType name="version">
	  <annotation><documentation>
	    Version number of xMML.
	  </documentation></annotation>
	  <restriction base="string">
	    <pattern value="\p{N}+(\.\p{N}+)*(\.\p{N}+-?(\p{L}|\p{N})+)?"/>
	  </restriction>
	</simpleType>

	<simpleType name="formula">
	  <annotation><documentation>
	    A formula with variables and some standard operators.
	  </documentation></annotation>
	  <restriction base="string"/>
	</simpleType>

	<!-- Shared attributes and elements -->
	
	<complexType name="anyContent" mixed="true">
	  <annotation>
	    <documentation>Any content is possible within this type</documentation>
	  </annotation>
		<sequence>
			<any minOccurs="0" maxOccurs="unbounded" processContents="lax"/>
		</sequence>
		<anyAttribute processContents="lax"/>
	</complexType>

	<complexType name="port">
	  <annotation>
	    <documentation>
	      The id, submodel execution loop operator and datatype of a port. If it
         concerns the port of a mapper, an operator should not be specified. The 
         optional type can be used to specify whether it concerns a port that only
         transfers a state or a regular one.
      </documentation>
    </annotation>
    
		<attribute name="id" type="NCName" use="required"/>
		<attribute name="operator" type="xmml:SEL"/>
		<attribute name="datatype" type="NCName"/>
		<attribute name="type" default="normal">
			<simpleType>
				<restriction base="NCName">
					<enumeration value="state"/>
					<enumeration value="normal"/>
				</restriction>
			</simpleType>
		</attribute>
		<anyAttribute processContents="lax"/>
	</complexType>
 
	<complexType name="range">
	  <annotation><documentation>
	       A scale range, with an optional minimum and maximum value. If the type
         is fixed, then during runtime this value will not vary and must be
         specified for each submodel instance that uses it.
    </documentation></annotation>
    
		<attribute name="type" default="variable">
			<simpleType>
				<restriction base="NCName">
					<enumeration value="variable"/>
					<enumeration value="fixed"/>
				</restriction>
			</simpleType>
		</attribute>
		<attribute name="min" type="xmml:unit"/>
		<attribute name="max" type="xmml:unit"/>
		<anyAttribute processContents="lax"/>
	</complexType>
</schema>