Method of creating classification pattern, apparatus, and recording medium

An apparatus comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• extract a partial character string including a reserved word and a character string immediately previous or subsequent to the reserved word from each of a plurality of pieces of target data, the plurality of pieces of target data conforming to a first pattern character string including the reserved word defined by a protocol,
• detect target data including the partial character string among the plurality of pieces of target data,
• specify a first partial character string from the extracted partial character string based on the detected target data, and
• create a second pattern character string for classifying the plurality of pieces of target data based on the first pattern character string and the first partial character string.

A non-transitory computer-readable recording medium storing a program that causes a computer to execute a process, the process comprising:

• extracting a partial character string including a reserved word and a character string immediately previous or subsequent to the reserved word from each of a plurality of pieces of target data, the plurality of pieces of target data conforming to a first pattern character string including the reserved word defined by a protocol;
• detecting target data including the partial character string among the plurality of pieces of target data;
• specifying a first partial character string from the extracted partial character string based on the detected target data;
• and
• creating a second pattern character string for classifying the plurality of pieces of target data based on the first pattern character string and the first partial character string.