4. Apparatus as claimed in claim 3 , wherein the device dependent information is stored as a set of tables and wherein the device dependent information is assimilated in a set of objects accessible to the tags in a run time environment of the code generating engine.
4. Apparatus as claimed in claim 3 , wherein the device dependent information is stored as a set of tables and wherein the device dependent information is assimilated in a set of objects accessible to the tags in a run time environment of the code generating engine. 6. Apparatus as claimed in claim 4 , wherein the set of tables are in hierarchical form defining a hierarchical tree in which device type nodes correspond to respective device types in successive hierarchical layers.