The output should be readable by the Dendrochronology Program Library
(DPL) as a compact format file.
In series IDs, letters of the English alphabet and numbers
are allowed. Other characters will be removed. The length of the
IDs is limited to about 50 characters, depending on the
length of the other items to be placed on the header lines of the
output file. Longer IDs will be truncated. Also any
duplicate IDs will be automatically edited so that only
unique IDs exist. If series IDs are changed, one
or more warnings are shown. In that case, the user may wish to print a
list of the renamings (see Arguments).