Single Letter Expansions
The following are single letter expansions. A number of additional single-letter expansions are not documented here as they are duplicates of the form %{Attribute-Name} .
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%%- 
Returns %.
 
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%d- 
Two-digit day of the month when the request was received. 
 
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%l- 
The Unix timestamp of when the request was received. This is an unsigned decimal number. It should be used with time-based calculations. 
 
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%m- 
Two-digit month describing when the request was received. 
 
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%t- 
Timestamp in ctime format. 
 
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%D- 
Request date (YYYYMMDD) 
 
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%H- 
Two digit hour of the day describing when the request was received. 
 
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%S- 
Request timestamp in SQL format, YYYY-mmm-ddd HH:MM:SS 
 
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%T- 
Request timestamp in database format, YYYY-mmm-ddd HH.MM.SS.000000 
 
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%Y- 
Four digit request year. 
 
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