That is the same as a partial tang or half tang. The snug fitting tang slot is cut in the handle material and it fits on the tang like a hot dog bun. Obviously, the spine side just goes straight back as a full tang. There is a stepped shoulder on the hidden side. The junction of the tang and blade at the edge side has a small radius just like a proper hidden tang.
To draw one out, draw the blade as a full tang, then re-draw the edge side of the tang as a hidden tang. That will give you the rough shape to cut out.