Storage medium for recording interface specification definition

A computer-readable storage medium for recording interface information of circuit module having a set of ports, the storage medium comprising:

• a first identifier region for storing, as a set of identifiers, combination patterns of signal values that respective ports of said set of ports are capable of assuming at a specific time;
• and
• a second identifier region for storing, as a second set of identifiers, functions of said circuit modules defined as combinations which includes first identifiers stored in said first identifier region,
• wherein said second identifiers includes said first identifiers.

A computer-readable storage medium for recording interface information of a circuit module having a set of ports, the storage medium comprising:

• a first identifier region for storing, as a set of identifiers, combination patterns of signal values that the respective ports of said set of ports are capable of assuming at a specific time;
• a second identifier region for storing, as a second set of identifiers, functions of said circuit module defined by using first identifiers stored in said first identifier region;
• and
• a third identifier region for storing, as a third set of identifiers, appearance order of functions of said circuit module defined by using a plurality of second identifiers stored in the second identifier region,
• wherein said third identifier region includes a first region and a second region, said first region storing therein second identifiers for defining functions of said circuit module that appears in a stationary state and said second region storing therein second identifiers for defining that said circuit module is in a non-behaving state.