Create a piece of knowledge (POK) from an MDB and a KMRobject
create_POK(mdb, kmr, tkcat = NULL)
A POK object: a list with 3 slots:
$mdb: the provided MDB object
$kmr: the provided KMR object
$helpers: a list functions to leverage data from mdb and kmr
a MDB object with KM specifications
a KMR object with KM requirements
A TKCat or chTKCat object to make available in helper environment