Z39.50 Messages and Records
ASN.1: Abstract Syntax Notation.1.
- an ISO(ISO 8824) standard for defining the content of messages
BER: Basic Encoding Rules. (ISO 8825)
- defines records/data with a triple-value
- a tag (fldid), a length (count), and a value (data).
- The records are binary encoded.
- converts logical content into a physical transmittable message
ASN.1/BER.
- It facilitates the exchange of structured data between programs over networks that is machine and language independent.