Definition. Document filter [ftip-0070]
Definition. Document filter [ftip-0070]
Let \(\dagger \) denote rejection. A document filter is a declared map \[ F:\mathcal D_{\rm doc}\longrightarrow \mathcal D_{\rm doc}\cup \{\dagger \}. \] It may retain a document, return a transformed document, or reject it. The lift \(F_{\#}\) applies \(F\) to a finite corpus and removes every \(\dagger \).
A filter specification includes the features it reads, thresholds, transformation rules, and implementation revision. An acceptance rate alone does not determine the retained document law.