defines the tri-state transfer modes. defines the usage of a logical filename. defines the legal namespaces of execution profiles. defines just a filename. logical filename representation. Derivation of Plain filename, with added attributes for variable name recording. abstract DAG in XML List of all filenames used. Job specification in terms of a logical transformation. Arguments on the commandline, text interrupted by filenames Execution environment specific data to be passed to lower levels. stand-in for "filename", linkage is "input" fixed. stand-in for "filename", linkage is "output" fixed. stand-in for "filename", linkage is "output" fixed. Level from search in router. List of dependencies. parent node refering to a job.