Table with only FlowFilters and no FlowField

Hi All, I am wondering what would be the purpose to have a table that only has FlowFilters, but no FlowField. For Example, take a look at Table “Acc. Schedule Line”. At first I thought it was mod by my company, but I just looked at Cronus and it is exactly the same. Thanks, Alex

The flowfilters are used in Matrixforms, i.e. used on another table (the MatrixSourceTable).