A log entry recorded during execution The excecution phase that the message occured in. The human readable content of the message. a label indicating the source of the message - e.g. module component name and line number in source code. The time at which the message was issued. signicance level of the message a concrete element containing the job identifier Enumeration of possible message log levels. a message with only informational content a message that warns about a possible error condition a message that informs about a definite error condition Any informative/error messages issued by the job during execution. An external identifier that the caller can use to identify a job. represents an invocation of a CEA application, with all the parameter values defined. the list of parameters supplied as input the list of parameters expected as output ivoa resource identifier of the application to call which interface of the application to call Defines what a parameter can contain when it is passed to be executed -This can be a single value element, or a simple construction of an array - could perhaps allow a VOQuantity as well. The value of the parameter - formally has an xsd type of string, though the 'real' type is encoded in the parameter definition very simple model of a array - cannot be sparsely filled, The id is a reference to the id of the parameter as defined in the parameters section - used to be called "name" give the opportunity to specify some form of encoding for parameter values. e.g. if passing a binary parameter by value. This specifies whether the parameter value is indirect - i.e. if value of the parameter is some form of URI to the actual parameter value. If the value is indirect then the CEA server implementation is expected to fetch the parameter before passing it on to the application. This is most often called 'passing by reference' in computer languages. possible mime type of the parameter simple array model - assumed to be fully filled in a row-major fashion editor note - should this be here to allow overriding of the parameter defintion. a way of grouping parameters to indicate that there will be a repetition of parameters into a table like structure - the "table" is presented to the interface in column order and the attribute ncol indicates how many columns A list of parameter values the allowable binary encodings for a parameter value. The parameter value formally has an xsd type of string, but the use of encodings would allow a pure binary object, e.g. a jpeg file to be included as a direct parameter value.