2.2.6.2 Differential Formatting (DXFs)
Like XFs (section 2.2.6.1), DXFs define a set of formatting properties. Unlike XFs, DXFs can define any number of formatting properties, from just one to all of them.
DXFs provide a way for features to reference a set of formatting properties. How those properties are used depends on the feature. The subsections that follow describe each of these features and how they use DXFs.
DXFs are specified by BrtDXF (section 2.4.356) records in the DXFS (section 2.1.7.50) collection, or by BrtDXF14 (section 2.4.357) records in the DXF14S collection.
Future records (section 2.1.6) that refer to differential formatting MUST refer to BrtDXF14 records.