The block that this jigsaw block becomes.
The joint option value, either "rollable" or "aligned".
The jigsaw block's name. This jigsaw block will be aligned with another structure's jigsaw block which has this value in the target tag.
The jigsaw block's target name. This jigsaw block will be aligned with another structure's jigsaw block which has this value in the name tag.
The jigsaw block's target pool to select a structure from.
Additional fields for jigsaw.