Defines the field of one of these on-line tables in the model, with the syntax [F:abv]name, abv being the abbreviation of the table and name, the name of the field). If the field is sized, it is possible to add a constant index, with the syntax [F:abv]name(index).
This field can either be a field that has not been indexed considering its characteristics while its indexation is forced (the Criterion field will then be equal to no), or a field which must be a filtering criterion that can be viewed on the right side of the search screen (the Criterion field will then be equal to yes).