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Account log file definition
Account log file definition
EBNF grammar
Introduction
EBNF grammar is used to describe the account-log file.
EBNF has the following meta-symbols:
• () brackets to indicate once (used to group alternatives together)
• [] brackets to indicate zero or once
• {} brackets to indicate zero or more
• | to separate alternatives
• + plus sign indicates one or more
• <> brackets to indicate a non terminal
The EBNF syntax has terminals and non-terminals. An example of a nonterminal is <digit>,
representing the digits 0 to 9. The digits 0 to 9 are the terminals. The non-terminal <digit> can be
used in syntax descriptions instead of the terminals. This makes the description more structured
and better readable.
Predefined non-terminals used throughout the document
<digit>
( 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9).
<yyyy>
<digit><digit><digit><digit>
Number of year. For example "2000" or "2002".
<mm>
<digit><digit>
Number of the month. Range 01..12. For example "01" or "12".
<dd>
<digit><digit>
Number of day of the month. Range 01..31. For example "03" or "28".
<date>
<YYYY><dash><MM><dash><DD>
<hh>
Numeric string of 2 digits with leading zeros in the range 00..23 Indicates the hour of the time.
<min>
Numeric string of 2 digits with leading zeros in the range 00..59 Indicates the minutes of the time.
<ss>
Numeric string of 2 digits with leading zeros in the range 00..59 Indicates the seconds of the time.
<time>
<hh><colon><mm><colon><ss>
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Chapter 8 - Accounting
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