X.500 Attribute-Value-Assertion (AVA): an attribute, as identified by some attribute ID, has some particular value. Values are as a rule ASN.1 printable strings. A conventional set of type IDs is recognized when parsing (and generating) RFC 1779 or RFC 2253 syntax strings.
AVAs are components of X.500 relative names. Think of them as being individual fields of a database record. The attribute ID is how you identify the field, and the value is part of a particular record.
Note that instances of this class are immutable.
@see X500Name
@see RDN
@author David Brownell
@author Amit Kapoor
@author Hemma Prafullchandra