The name of the object.
The object type of the object.
The object sub-type.
Get the value of an attribute.
the name of the attribute.
the value(s) of the attribute if it exists, or undefined
if
the object does not have an attribute with the given name.
In case the object has multiple attributes with the same name,
an array with the values is returned instead of a single string.
Base class for all kinds of objects stored in an EDB.