Families To Persons Case.pdf

- Case: Families to Persons
- Authors: Anthony Anjorin (Paderborn University), Thomas Buchmann, Bernhard Westfechtel (University of Bayreuth)
- Implementation: Within the Benchmarx framework [2], based on previous conceptual work [1]
- Bidirectional Transformations (bx): Transformations that can be executed from source to target and vice versa, used in various scenarios like data converters, round-trip engineering, and view updates.
- Case Description:
- Source: FamilyRegister (metamodel in Figure 1(a)) storing families with members having roles (father, mother, daughters, sons).
- Target: PersonRegister (metamodel in Figure 1(b)) containing a flat collection of persons (male or female).
- Consistency: A bijective mapping between family members and persons, with mothers/daughters paired with females and fathers/sons with males, and persons' names composed from family member names.
- Transformations:
- Forward: Map each family member to a person of the same gender, compose the person's name from the surname and first name; birthday remains unset.
- Backward: Configurable with parameters 'PREFER CREATING PARENT TO CHILD' and 'PREFER EXISTING FAMILY TO NEW' to reduce non-determinism.
- Incremental Transformations: Consider updates like insertions, deletions, attribute value changes, and move operations in both directions.
- Information Loss: Occurs in both directions (forward: distinction between parents/children and family aggregation; backward: birthdays).
- Scenario: Round-trip engineering, where both models can be edited, and changes need to be propagated back and forth.