Design Change Styles
- Last UpdatedDec 04, 2025
- 1 minute read
The Design Change Style (DCSTYL) defines the appearance of changed design elements specified by a DCRULE that references it. Each DCSTYL defines eight styles/colours that will be used to draw changed design elements. These are equivalent to the six styles/ colours of a Representation Style plus the two styles/colours (Outline and Fill) of a Hatching Style. All eight styles/colours may be set to specific values. Alternatively, a style can be set to OFF or UNCHANGED, and a colour may be set to UNCHANGED. If set to UNCHANGED, the relevant Representation or Hatching style/colour will be used. If any of the Representation or Hatching styles are set to OFF they will not be overridden by the Design Change Style style/colour.
The DCSTYL attributes, with their defaults, are as follows:
|
Frontface Style/Colour |
FFSTYLE/FFCOLOUR |
SOLIDTHICK/8 |
|
Backface Style/Colour |
BFSTYLE/BFCOLOUR |
DOTTEDTHICK/8 |
|
Obscured Line Style/Colour |
OBSTYLE/OBCOLOUR |
LDASHTHICK/8 |
|
Centreline Style/Colour |
CLSTYLE/CLCOLOUR |
CHAINEDTHICK/8 |
|
P-line Style/Colour |
PLNSTYLE/PLNCOLOUR |
DASHEDTHICK/8 |
|
Member Line Style/Colour |
MLNSTYLE/MLNCOLOUR |
CHAINEDTHICK/8 |
|
Outline Style/Colour |
OLSTYLE/OLCOLOUR |
SOLIDTHICK/8 |
|
Fill Style/Colour |
FSTYLE/FCOLOUR |
SYSTEMPATTERN1/8 |
Note that DCSTYLs are not exact equivalents of Representation Styles, they do not have Tubing Flag (TUBEF), Drawing Level (DLEV), attributes. The values of these attributes are determined from the relevant Representation Styles. The DCSTYL only defines which, if any, of the standard style/colour values should be overridden in order that changed Design elements are marked.
Design elements that have no DCSTYL assigned to them will not have any changes that are made to them marked. Within a VIEW, it is therefore possible to mark changes made to pipework, for example, but ignore changes made to steelwork.