This part of ISO/IEC 19794 specifies the interchange format for the exchange of pattern-based skeletal fingerprint recognition data. The data format is generic in that it can be applied and used in a wide range of application areas where automated fingerprint recognition is involved. This part of ISO/IEC 19794 also specifies elements of conformance testing methodology, test assertions, and test procedures as applicable to the interchange format for the exchange of pattern-based skeletal fingerprint recognition data. This part of ISO/IEC 19794 establishes — test assertions of the structure of the finger pattern skeletal data format as specified in this part of ISO/IEC 19794 (Type A Level 1 as will be defined in ISO/IEC 19794-1:2011/Amd.2), — test asssertions of internal consistency by checking the types of values that may be contained within each field (Type A Level 2 as will be defined in ISO/IEC 19794-1:2011/Amd.2). This part of ISO/IEC 19794 does not establish — test of conformance of CBEFF structures required by this part of ISO/IEC 19794, — test of consistency with input biometric data record (Level 3), — test of other characteristics of biometric products or other types of testing of biometric products (e.g. acceptance, performance, robustness, security), — test of conformance of systems that do not produce ISO/IEC 19794-8 records.