Versions Compared

Old Version 19

changes.mady.by.user Unknown User (a.jansen)

Saved on

compared with

New Version 20

changes.mady.by.user Unknown User (a.jansen)

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
Panel
bgColorwhite

UNKNOWN


Use the '?' (question mark), representing UNKNOWN, to check if an expression or an attribute has a value.

Example

Suppose a model with an entity Person and attributes Person.name and Person.age. In runtime, a user fills out a form and enters his name, but forgets to fill out his age.

As a result:

ExpressionResultTypeReason
Person.name = ?FALSEbooleanThis attribute is filled out
Person.age = ?TRUEbooleanThis attribute is not filled out, and therefore UNKNOWN





Panel
bgColorwhite

TRUE


This is the boolean value TRUE.

Panel
bgColorwhite

FALSE


This is the boolean value FALSE.

Panel

All logical functions

Children Display
pageLogical functions

Expression function reference

Children Display
pageExpression function reference