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Notes

Backus-Nauer Form (BNF)

Definition:

<name> ::= <definition>

Rules:

<digit> ::= 0|1|2|3|4|5|6|7|8|9

<number> ::= <number> | <digit> <number>

<op> ::= +|-|x|/

<SAE> ::= <number>|<SAE>|<SAE><op><SAE>

Example:

• 9 is primitive 9

• 19 is construct of 1 and 9

• 619 is construct of 6 and 19

• BNF is used for ASN.1 constructs

• Constructs developed from primitives

• The above example illustrates how numbers are constructed from the primitive <digit>

• Simple Arithmetic Expression entity (<SAE>) is constructed from the primitives <digit> and <op>

Network Management: Principles and Practice

© Mani Subramanian 2000

3-30

Chapter 3

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