TYPE Key

Each function is characterized by the Deriscope Type in which it belongs.
The key here specifies that Deriscope Type.
It is needed to distinguish between different Deriscope Functions that happen to share the same name.
For example, there exist several functions called Create, each belonging to a different Deriscope Type.
Therefore the function "Create" of Deriscope Type Stock Option is different from the function "Create" of Deriscope Type IRS
For local functions, i.e. for functions associated with a particular Deriscope Object, the key here is not needed, since the corresponding information can be deduced by the supplied object.