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Geospatial Administrator has a number of built-in XFM feature properties that can be incorporated into the feature property definition. For example, you may want to place or capture the origin coordinates of a point feature. In that case, you would use the FeaturesCentroid.X , Y or Z property that's built-in and available to use.
Point Feature Origin:
Calculates the X, Y or Z coordinates of the point feature.
Key = editing, Synch Preference = OFF
The following will be triggered after the feature has been placed, and the Edit mode has activated. An alternate approach is to create an annotation sub-feature which automatically triggers the Edit key for the calculating the feature property. Or, use the Sync1 MDL application that enables editing keys to auto-update anytime the feature is modified with Map or MicroStation. Refer to: Auto update editing initial values (Sync1)
Value Type = cExpression
Value = [FeatureName.FeaturesCentroid.X]
Value = [FeatureName.FeaturesCentroid.Y]
Value = [FeatureName.FeaturesCentroid.Z] - For 3D only
Other built in XFM properties include:
Area, Length, Perimeter, Level, Color, Weight, Style, ElementID, ElementClass, Transparency, Priority, Locked, Modified, New, Solid, ViewDependent, GraphicGroup, Model, ModifiedTime, Fill and CellName.
For additional information on the built-in XFM properties, please refer to the product documentation found at docs.bentley.com