D-Format

D-format (or Sheffield format) by Ian Tyers is a format with meta data stored on the first 22 lines and then a sequence of ring width data - each one on a separate line - with oldest ring width value first and youngest value last. It is described in TRiDaS code repository

Example

Here is an example file named "oak01a.d" from Martin Bridge:

oak01a
26
R
1
R
0
B
made by Worker1  27/5/2010
?
?
V
?
0
0
N
N
beams
oak01a
?
QUSP
?
D
123
145
164
182
146
124
96
104
108
114
135
123
89
114
119
127
138
145
118
120
122
136
147
152
138
120

In this case the dating is relative: line 3 is "R" ("A" implies absolute dating).
CDendro then adds 8000 to the starting date (year) specified on line 4, here giving 8001 as the starting year (oldest year) of the series.

This is a corresponding .rwl-file created by CDendro:

Untitl 1 
Untitl 2                                                           8001 8026
Untitl 3 
oak01a  8001   123   145   164   182   146   124    96   104   108
oak01a  8010   114   135   123    89   114   119   127   138   145   118
oak01a  8020   120   122   136   147   152   138   120   999
oak01a  #### oak01a
oak01a  #### made by Worker1  27/5/2010
oak01a  #### oak01a