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More generally, the use of the OCTET STRING and BITSTRING types should always be the last resort once all the other ASN.1 types have been discarded as inappropriate models of the problem in hand.The purpose of ASN.1 is to abstract the data structures, releaving the designer from the burden of how they are actually represented. In other words, if the desired data structure is an array of boolean flags, then by all means use a
SEQUENCE OF BOOLEAN ; don't use BITSTRINGs. The desired
output encoding has nothing to do with the data structure ; it is done through
the ASN.1 encodings (DER [18], CER [18], PER [19], XER [20] etc). BITSTRINGs are not supported
by the Data Modeling Toolchain.