This section of the schema deals with alignments. The alignment can be either a sequence alignment or a structural alignment. description of object. id e.g. 1tim.A,8tim.B, P001228, ...; type: type of object e.g.: protein, dna. version: last time this object has been changed (sometimes not so easy to know ...) e.g.: number of identical residues, % id residues, aligmnent score, e-value, p-value, etc. the alignment given for a single object the alignment given for a single object e.g. 2D23M4I geometrical operation to perform on 3D object