Module:ParentItem/slotpos/doc

Stores each slot position in the grid in terms of its rows and columns. These values are measured relative to the top right corner of the occupied slot icon at that slot.
 * For the rows, a value of  occurs at the top edge of the block containing the dark background image of the item, increasing towards the bottom until it reaches   at the edge.
 * For the columns, a value of  iccurs at the right edge of the block containing the dark background image of the item, increasing towards the left until it reaches   at the edge.

Credits

 * Thanks The Federation for figuring out the regularity of the slot positions!