This function returns value that indicated class modification time but it is not the time.
If a class or any of its parents have been modified the value will increase.
If a class or any of its parents have been modified later then another the value will be bigger.
Syntax
public const string enginedll = @"engine.dll";
[DllImport(enginedll, EntryPoint = "GetClassModificationMark")]
public static extern Int64 GetClassModificationMark(Int64 owlClass);
Property owlClass
Size: 64 bit / 8 byte (value)
This attribute represents a handle to the class. The term owl is comming from W3C, the classes follow the expression power of Semantic Web concepts, therefore classes support multiple inheritance. Technically classes can also be distributed over different resources, however for this the parametric library is required as an extension on the basic Geometry Kernel API.