Classes

Base catalogues binary operation class.
Merge operation between two catalogues as follows: all = source ∪ target = {x: x ∈ source ∨ x ∈ target} new = all ∖ source = {x: x ∈ target ∧ x ∉ source} obsolete = source ∖ all = {x: x ∈ source ∧ x ∉ source ∧ x ∉ target} = ∅ Basically, the result contains messages from both catalogues.
Target operation between two catalogues: intersection = source ∩ target = {x: x ∈ source ∧ x ∈ target} all = intersection ∪ (target ∖ intersection) = target new = all ∖ source = {x: x ∈ target ∧ x ∉ source} obsolete = source ∖ all = source ∖ target = {x: x ∈ source ∧ x ∉ target} Basically, the result contains messages from the target catalogue.

Interfaces

Represents an operation on catalogue(s).