The ErrorModelPrototype is used to define hierarchical error models allowing additional detail or structure to be described in the error model of a particular target. A hierarchal structure can also be defined when several ErrorModels are integrated into a larger ErrorModel representing a system integrated from several targets. <br/><br/>Typically the target is a system/subsystem, a function, a software component, or a hardware device.<br/><br/>Constraints:<br/>target shall only reference concrete system elements. For EAST-ADL this would be elements in the Structure package.<br/><br/>Semantics:<br/>An ErrorModelPrototype represents an occurrence of the ErrorModelType that types it.<br/><br/>Extension:<br/>(See ADLFunctionPrototype)<br/>