Assign a Role to a Table
Like with all blocks, you can add a role to a table using the role attribute.
The role attribute becomes a CSS class when converted to HTML.
The preferred shorthand for assigning the role attribute is to put the role name in the first position of the block attribute list prefixed with a . character, as shown here:
[.name-of-role]
|===
|Cell in column 1, row 1
|Cell in column 2, row 1
|Cell in column 1, row 2
|Cell in column 2, row 2
|===