Here is a yoke that is cut only part way from the rest of the bodice. The pattern is all in one piece.

The waistline dart control can be shifted all or in part to the partial yoke line. Like all dart control it may be used in this position as onedart, multiple darts, dart tucks, or gathers.
Since there is practically no seam allowance at the point where the slashing stops, it is difficult to sew designs like this. Here are two ways in which this can be overcome.

1.Reinforce the point with stay stitching, slash, turn to the underside, and stitch the seam tapering off the point.
2. Reinforce the point with a patch of organza stitched to the right side as a facing. Slash; turn to the underside, press. Use the organza as a seam-allowance stitching close to the previous line of stitching.

{Credit} Design Your Own Dress Patterns (book)
Adele P. Margolis