Data type: char
Must appear in a looped list containing '_geom_bond_atom_site_label_'
no 'do not include bond in special list'
n 'abbreviation for "no"'
yes 'do include bond in special list'
y 'abbreviation for "yes"'
Enumeration default: no
This code signals if the bond distance is referred to in a publication or should be placed in a list of significant bond distances.