DATA DRIVEN TYPE INFORMATION PROCESSING APPARATUS CAPABLE OF PROCESSING UNTAGGED DATA HAVING NO TAG INFORMATION

A data driven type information processing apparatus includes an information processing unit for carrying out an operation process according to a data flow program based on a data packet with a tag attached thereto, and a tag attaching unit provided in an input stage of the information processing unit. The tag attaching unit attaches a prescribed tag to data without a tag, which is applied externally or from another information processing apparatus connected on-line to generate a tagged data packet, and applies the tagged packet to the information processing unit. An information processing apparatus which is connected on-line to the present information processing apparatus and mutually exchanges the processed data mutually is not limited to either von Neumann type or non Neumann type (data driven type). Accordingly, the data driven type information processing apparatus of the present invention can be used together with various types of information processing apparatus, and a system capable of processing both tagged and untagged data can be constructed.