IFC Export Options

IFC specific options can be typed into the command line, if the ifcExplorerObj PML Object is used, these values are validated.

Note:
GUIDs are not automatically set during export using the command line, this must be manually set. The Graphical User Interface collects all those elements that do not have a set GUID. There is a function called !!setUnsetGUIDs() which operates on the export list.

Format

Defines which version of the schema is used, it can be one of the following:

• IFC2x3

• IFC4

For example, to use the IFC4 schema, use:

EXPORT OPTION |FORMAT| |IFC4|

The default value is IFC2x3.

Component Level

Specifies whether or not to create a separate IFC entity for each Nozzle/Piping Component and so on.

For example, to export components separately, use:

EXPORT OPTION |COMPONENTLEVEL| |ON|

Data Level

Specifies what level of detail to export, it can be one of the following options.

For example, to export complex geometry and only set attributes, use:

EXPORT OPTION |DATALEVEL| |GA|

Complex geometry is where the interface tries to represent the model geometry in a more compact form, rather than at the lowest common denominator form of triangulated facets. Most receiving Systems accept faceted geometry at the cost of a much larger transfer file.

There might be many attribute fields that are unset. If these are transferred, the resultant IFC file can become unnecessarily large. This option enables the ability to include or ignore empty fields.

Note:
The default value is FA, if an invalid value is typed, this value is used.

Logging Detail Level

The logging detail can be set at one of two settings:

• 2 - Brief logging.

• 3 - Medium logging.

For values requiring a log file, a log file must be defined. For example, for medium logging, use:

EXPORT OPTION |LOGDETAIL| |3|

EXPORT OPTION |LOGFILE| |E:\BIMIFC\models\logfile.log|

Reference Datum

Specifies the Reference Datum, examples of usage are:

EXPORT OPTION |DATUM| |=2013286748/34|

EXPORT OPTION |DATUM| |/GLOBAL|

EXPORT OPTION |DATUM| |/GLOBAL-HDR|

EXPORT OPTION |DATUM| |GLOBAL|

Internally, in the Application Data World, the Reference Datum elements have a special suffix of "-HDR" which is not displayed. This is managed better by using the exporter object.

Arc Tolerance

The arc tolerance is set using the display arc tolerance syntax, for example:

REPRE DARCTOL 10mm

The command controls the detail with which arcs are transferred as facets. A smaller value means that curved surfaces display smoother. However, finer tolerance settings have a significant effect on the size of the IFC file.

For further information, refer to GUIDs.