Slab/BS

Java Edition:

Name	Default value	Allowed values	Description
type	bottom	bottom top	Where the slab is within its block.
		double	The block is a double slab.
waterlogged	false	false true	Whether or not there's water in the same place as this slab.

Bedrock Edition:
Stone slab and double stone slab:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
stone_slab_type	0x1 0x2 0x4	smooth_stone	smooth_stone	0	Smooth Stone Slab
			sandstone	1	Sandstone Slab
			wood	2	Petrified Oak Slab
			cobblestone	3	Cobblestone Slab
			brick	4	Brick Slab
			stone_brick	5	Stone Brick Slab
			quartz	6	Quartz Slab
			nether_brick	7	Nether Brick Slab
top_slot_bit (Deprecated)	0x8	false	false true	0 1	Whether or not this slab is an upper slab.

Wood slab and double wood slab:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
wood_type	0x1 0x2 0x4	oak	oak	0	Oak Slab
			spruce	1	Spruce Slab
			birch	2	Birch Slab
			jungle	3	Jungle Slab
			acacia	4	Acacia Slab
			dark_oak	5	Dark Oak Slab
top_slot_bit (Deprecated)	0x8	false	false true	0 1	Whether or not this slab is an upper slab.

Stone slab 2 and double stone slab 2:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
stone_slab_type_2	0x1 0x2 0x4	red_sandstone	red_sandstone	0	Red Sandstone Slab
			purpur	1	Purpur Slab
			prismarine_rough	2	Prismarine Slab
			prismarine_dark	3	Dark Prismarine Slab
			prismarine_brick	4	Prismarine Brick Slab
			mossy_cobblestone	5	Mossy Cobblestone Slab
			smooth_sandstone	6	Smooth Sandstone Slab
			red_nether_brick	7	Red Nether Brick Slab
top_slot_bit (Deprecated)	0x8	false	false true	0 1	Whether or not this slab is an upper slab.

Stone slab 3 and double stone slab 3:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
stone_slab_type_3	0x1 0x2 0x4	end_stone_brick	end_stone_brick	0	End Stone Brick Slab
			smooth_red_sandstone	1	Smooth Red Sandstone Slab
			polished_andesite	2	Polished Andesite Slab
			andesite	3	Andesite Slab
			diorite	4	Diorite Slab
			polished_diorite	5	Polished Diorite Slab
			granite	6	Granite Slab
			polished_granite	7	Polished Granite Slab
top_slot_bit (Deprecated)	0x8	false	false true	0 1	Whether or not this slab is an upper slab.

Stone slab 4 and double stone slab 4:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
stone_slab_type_4	0x1 0x2 0x4	mossy_stone_brick	mossy_stone_brick	0	Mossy Stone Brick Slab
			smooth_quartz	1	Smooth Quartz Slab
			stone	2	Stone Slab
			cut_sandstone	3	Cut Sandstone Slab
			cut_red_sandstone	4	Cut Red Sandstone Slab
top_slot_bit (Deprecated)	0x8	false	false true	0 1	Whether or not this slab is an upper slab.

Other slabs and double slabs:

Name	Metadata Bits	Default value	Allowed values	Values for Metadata Bits	Description
minecraft:vertical_half	Not Supported	bottom	bottom top	Unsupported	Where the slab is within its block.
top_slot_bit (Deprecated)	0x1	false	false true	0 1	Whether or not this slab is an upper slab.