ELEMENT OF OPENING UPWARDS
WHITE TRIANGLE CONTAINING SMALL WHITE TRIANGLE
OPEN SUPERSET
OR WITH DOT INSIDE
REVERSE SOLIDUS PRECEDING SUBSET
AND WITH DOT
UPPER LEFT CORNER WITH DOT
FULL OUTER JOIN
LARGE DOWN TACK
UP TACK WITH CIRCLE ABOVE
WHITE CONCAVE-SIDED DIAMOND WITH RIGHTWARDS TICK
WHITE SQUARE WITH LEFTWARDS TICK
MATHEMATICAL RIGHT ANGLE BRACKET
MATHEMATICAL LEFT DOUBLE ANGLE BRACKET
MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET
MATHEMATICAL RIGHT WHITE TORTOISE SHELL BRACKET