]> This attribute refers to the physical URL where the code archive may be downloaded. A code archive may have several Download locations. The server will try to contact one after another until it finds a working URL. This behaviour is not deterministic and does not rely on any kind of order. The version tag only informative. This might later be replaced by some more elaborate system. This attribute is the call required to execute the program on the system previous Version must have the same the same type and a smaller version number he value of this attribute must be the string representation of the class that provides the implementation of the component his optional attribute represents the name of the URL that links to the serialized state of the component. It is ignored if the file is not found. he value of this attribute specifies the domainName of the component. It is equivalent to namespaces, if this attribute is omitted the Component is assigned the default domain-name. The value of this property may not be JMImplementation Every Component must have a ComponentName. No two MBeans may be represented by the same ComponentName. A ComponentName. This means that the list of key properties must be unique within the domainName A ConstructorArgument is a triple (key, type, value) that is passed to a component while the construction. The value of the type attibute must correspond to the name of a fundamental Java Datatype (boolean, byte, char, short, int, long, float or type) or one of the java.lang. wrapper types for such fundamental data types (e.g. Boolean) A current association between MBeans that satisfies a given relation type. A relation can only be created and modified such that the roles of its defined type are always respected. A relation can also have properties and methods that operate on its MBeans. A relation type provides information about the roles it contains, such as their multiplicity, and the class name of Components that satisfy the role. The list ofcomponents that currently satisfies a given role in a relation. The role value must at all times conform to its corresponding role information. The role information provides a metadata description of a role. It specifies: n The name of the role. n The multiplicity of the role, expressed as a single closed interval between the minimum and maximum number of MBeans that can be referenced in that role.The role information provides a metadata description of a role. It specifies: n The name of the role. n The multiplicity of the role, expressed as a single closed interval between the minimum and maximum number of MBeans that can be referenced in that role. The value of this attribute determines whether the role is readable, writable, or both. The name of the class or interface of which all members must be instances, as determined by the MBean server’s isInstanceOf method. The roleName must be unique among all roles of the given relation type he dependsOn association leads to the recursive loading of other Components and their instantiation before the component itself is instantiated. Users may define further dependencies via relationtypes. The relationservice is automatically started and enforces the cardinality of the respective roles at runtime.