Below are links to various specification files (the files are also available in the code, which configures the files to a local location).
English month names
Names in English for beginning time value
Names in English for ending time value
Names in English for current time value
Period delimiter
Left-hand period delimiter
Right-hand period delimiter
Interval direction syntax - list
Interval direction syntax - negative list
Interval direction syntax - positive list
Distributions for probability mass function