acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONThis is an optional field. See Section 7.3.3 for details.8.20.29 Field 20.996: Hash/ HASThis is an optional field. It shall contain the hash value of the source representation in theexternal file reference in Field 20.994: External file reference / EFR or the 2D still imageor other biometric data in Field 20.999: Source representation data / DATA of this record,calculated using SHA-256. See Section 7.5.2.8.20.30 Field 20.998: Geographic sample acquisition location / GEOThis optional field contains the location where the original source was acquired – not whereit is stored. See Section 7.7.3.8.20.31 Field 20.999: Source representation data / DATAIf this field is used, Field 20.994: External file reference / EFR shall not be set. However,one of the two fields shall be present in all instances of this record type. See Section 7.2 fordetails this field entry. In Traditional format, this field shall be the last field in the recordlayout. It is mandatory for a 2D still image.8.21 Record Type-21: Associated context recordThe Type-21 record contains an associated context record. This information does NOTcontain information used to derive biometric information contained in other records. RecordType-20 serves that function. Record Type-21 may be used to convey contextualinformation, such as an image of the area where latent fingerprints were captured.May, 2013 DRAFT VERSION UPDATE 2013 Page 405