<simpleType name="SuccessionType">
    <annotation>
        <documentation>Feature succession is a semantic relationship derived from evaluation of observer, and 
			Feature Substitution, Feature Division and Feature Fusion are defined as associations between 
			previous features and next features in the temporal context. 
			Successions shall be represented in either following two ways. 
			* define a temporal topological complex element as a feature element 
			* define an association same as temporal topological complex between features.</documentation>
    </annotation>
    <restriction base="string">
        <enumeration value="substitution" />
        <enumeration value="division" />
        <enumeration value="fusion" />
        <enumeration value="initiation" />
    </restriction>
</simpleType>