Using views to filter data display
When a view is associated with the database,
TABL display mode only shows the data (segment occurrences)
associated with one segment type at any one time.
This segment type is referred to as the
currently formatted
segment type. Selected
segment occurrences that are not of the current
type are represented by shadow lines.
These segment occurrences are referred to as the
suppressed
segments. Segment occurrences
that are of the current type but are not selected
are not shown in the view.
Segment occurrences of the current type are selected or not-selected, depending upon how their values match the layout identification and field selection criteria defined in your view.