23 Examples:

    24 

    25 - When changeset A is replacement by a changeset A', one marker is stored:

    26 

    27     (A, (A'))

    28 

    29 - When changesets A and B are folded into a new changeset C two markers are

    30   stored:

    31 

    32     (A, (C,)) and (B, (C,))

    33 

    34 - When changeset A is simply "pruned" from the graph, a marker in create:

    35 

    36     (A, ())

    37 

    38 - When changeset A is split into B and C, a single marker are used:

    39 

    40     (A, (C, C))

    41 

    42   We use a single marker to distinct the "split" case from the "divergence"

    43   case. If two independants operation rewrite the same changeset A in to A' and

    44   A'' when have an error case: divergent rewriting. We can detect it because

    45   two markers will be created independently:

    46 

    47   (A, (B,)) and (A, (C,))