5. The interactive method of claim 2 wherein the associative relationship between a first key object data item and a first information data item each indicating non-machine-recognizable data is produced using a unique key object identifier assigned to the first key object data item; the unique key object identifier being machine-recognizable data and stored in the second data structure to indicate the first information data item.
2. The interactive method of claim 1 for operating a processor-controlled system to modify a correlation between two data structures wherein the key object data items included in the first data structure and the information data items included in the second data structure each indicate non-machine-recognizable data; the non-machine-recognizable data indicated by an information data item being retrievable using the non-machine-recognizable data indicated by a respective one of the key object data items; the system user being able to modify associative relationships established between non-machine-recognizable data.