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An S4 class to represent time ranges.

Slots

upper,lower

A numeric matrix giving the lower and upper boundaries.

names

A character vector specifying the name of the events/phases.

calendar

A character string specifying the chronological scale (either "CE", "BP" or "b2k").

hash

A character string giving the 32-byte MD5 hash of the original data file.

Author

N. Frerebeau