ASN.1:
RFC1023: HEMS monitoring and control language.
RFC1076: HEMS monitoring and control language.
RFC3641: Generic String Encoding Rules (GSER) for ASN.1 Types.
RFC3727: ASN.1 Module Definition for the LDAP and X.500 Component Matching Rules.
RFC4049: BinaryTime: An Alternate Format for Representing Date and Time in ASN.1.