LAYER Rules

Standard selection syntax is used to define Layer Rules. These specify which design elements are to be organized onto AutoCAD Layers. The selection syntax is followed by a comma and the layer definition to be used, which must have a LAYERDEF. The matching of the layer names is case blind, but the export will use the case of the name from the definition, as AutoCAD is not case blind.

Example

LEVEL ALL STRU, 'Structures'

LEVEL ALL BRAN WITH ( HBOR GE 100 OR TBOR GE 100 ) , 'Pipes'

LEVEL ALL EQUI WITH :purpose EQ HVAC, 'Ventilation'

LEVEL ( /C1101 ) , 'Pump'

LAYER rules are applied in order; therefore, if a rule has already been applied for a given element, a later rule will not affect it.

Design elements which can have level rules include: SITE, ZONE, STRU, SUBS, FRMW, SBFR, EQUI, SUBE, PIPE, BRAN, HVAC, REST, GRDM, PTRA, BOUN, DRAWI (when owned by a SITE or ZONE) and all Piping Components.

Note:
The command line option DESRULEBYLAYER will cause the elements that match layer rules to be exported with their colour set to 'ByLayer'.