Encoding scheme

The Character Data Representation Architecture (CDRA) system of tags uses an encoding scheme to specify many rules.

The rules include:

  • The coding space (number and allowable value of code points in a code page)
  • Rules for sharing the coding space between control and graphic characters
  • Rules related to specific options, such as the number bytes required for each character (single-byte, double-byte, or mixed-byte) permitted in that scheme
  • Rules related to code extension techniques (if used)

The rules for encoding schemes are followed when code points are assigned to graphic characters in a particular code page. Some common encoding schemes are Extended Binary Coded Decimal Interchange Code (EBCDIC) and American Standard Code for Information Interchange (ASCII).