Symbols used in the FHX2 data format and their explanations.


Symbol 	Explanation 

[ 	left square bracket: pith date, the very inside date possible on the tree 

] 	right square bracket: bark date, the very outside date possible on the tree 

{ 	left curly bracket: the innermost date possible on the tree - pith is not present 

} 	right curly bracket: the outermost date possible on the tree - bark is not present 

. 	a period: a "null" year - a dated tree ring for which no information on fire history is available, e.g., the ring formed prior to the initial scarring event 

| 	a vertical line (or "pipe" symbol): a "recorder" year - a dated tree ring that formed after the initial scarring event, but contains no scar 

D,d 	a fire scar (uppercase) or injury (lowercase) situated in the dormant position, between the previous years=s latewood and the current year's earlywood 

E,e 	a fire scar (uppercase) or injury (lowercase) situated in the early (one-third) portion of the earlywood 

M,m 	a fire scar (uppercase) or injury (lowercase) situated in the middle (one-third) portion of the earlywood 

L,l 	a fire scar (uppercase) or injury (lowercase) situated in the latter (one-third) portion of the earlywood 

A,a 	a fire scar (uppercase) or injury (lowercase) situated in the latewood 

U,u 	a fire scar or injury for which the position could not be determined