• ModelEnhancementRequirements

This topic is further information related to the CategoryXForms12 feature of improving ability for a form to reused model content defined elsewhere.

Encapsulation

• External whole model
• Reuse a model in multiple forms: Attach different UIs to the same whole model
• Separation of concerns: Language-specific models with binds IDs for UI dereferencing

Narrowing-Only Inheritance / Specialization

• Include a base model
• Add additional non-contradictory model content (e.g. non-overriding binds)
• Specialize by additional binds to restrict access, add access, more bind sites for access control
• Specialize with additional instances, actions, submissions to transform back-end transactional data format into format appropriate for UI binding
  • In the limit, the UI could be looked at as another reusable component, but for simplicity we will keep that as a separate issue.

Fragment Inclusion

• Stepping through a process with multiple pages, filling in parts
• Including external content once into a model
• E.g. include a main model plus add some page-specific constraints
• Could be viewed as specialization, but then would be unable to compose a form consisting of multiple bundles of such constraints

Adaptations / Composition

• Multiple reusable artifacts that characterize each web service
• In a main form, want to pull in these artifacts and talk to them
• Web Services
  • Write instances and submission for a web service
  • Pull that into larger model
  • Copy data to request payload, invoke, copy data from response payload

Fragment Reusability

• multiple times in same page
• contextualize fragment content (e.g. starting context node)
• ID space challenge