ASN.1 Data Types

BOOLEAN(1)

takes values true and false

INTEGER(2)

any positive or negative whole number

REAL(9)

expressed as mantissa, base, exponent

BITSTRING(3), OCTETSTRING(4)

an ordered sequence of 0 or more bits or octets (bytes?)

NULL(5)

takes only one value, null...

ENUMERATED(10)

a list of values is supplied

brainDamaged ::= BOOLEAN
numberOfEmployees ::= INTEGER
avogadrosNumber ::= REAL(602,10,23)
sevenDeadlySins ::= ENUMERATED {
    pride(1), envy(2), gluttony(3), avarice(4), lust(5), sloth(6),
wrath(7)
} -- corresponding to OSI 7 layers :-)