< protocol , standard > (PER) ASN.1 encoding rules for producing a compact transfer syntax for data structures described in ASN.1 , defined in 1994.
PER provides a much more compact encoding then BER . It tries to represents the data units using the minimum number of bits . The compactness requires that the decoder knows the complete abstract syntax of the data structure to be decoded, however.
Documents: ITU-T X.691, ISO 8825-2.
(1998-05-19)