[DMN Designer] Default cell symbols

As a citizen developer, I want to build my decision logic with as small effort as possible. Especially I want to build the valid expressions with minimal interaction with the designer. For this reason the designer should fill in default values/symbols into cells where possible. This should help with DMN designer getting started experience.

In this epic we should discuss where is possible to fill some default values/symbols into expression cells.

Context

I think no appropriate default value exists. Maybe with exception of the last row?

Literal Expressions

My proposal would be:

• empty cell, if it is valid value for literal expression cell, if not
• value according to the column data type, 0 for number, today for date ...

Decision table

• symbol - due to trisotext samples

Function

Really not sure

Relation

Really not sure

Invocation

Really not sure

manstis@redhat.com etirelli mmortari@redhat.com could you please put your thoughts into comments? I filed this epic to follow agile process. Not saying something from description will happen. However if we will agree on some default values we can then file separate tasks for this epic. I f we agree it is not good idea, we will close the epic.

Manual Acceptance test

Note: Proposed after discussion in this jira

• Autogonerated top level decision table, input is structure
• Nested decision table, for example as context entry
• Adding columns/rows