The DESCRIPTION clause, which must be present, contains a textual definition of the textual convention, which provides all semantic definitions necessary for implementation, and should embody any information which would otherwise be communicated in any ASN.1 commentary annotations associated with the object.
Note that, in order to conform to the ASN.1 syntax, the entire value of this clause must be enclosed in double quotation marks, and therefore cannot itself contain double quotation marks, although the value may be multi-line.