ZL62 labels
A ZL62 label is a compact, case-sensitive encoding of an ambient product of type A flag varieties and a defining homogeneous vector bundle. It identifies a zero-locus presentation; several presentations can belong to the same deformation family.
The part before the dot encodes the ambient variety. When present, the part after the dot encodes the defining bundle. A presentation with zero defining bundle is the ambient variety itself.
For example, 40 presents projective four-space with zero defining bundle.
Keep ZL62 labels as text: letter case matters, and even an entirely numerical label is an identifier.
The defining data on each family page displays the ambient variety and bundle explicitly. See the bundle notation, or use the ZL62 encoder and decoder to inspect an encoding.