Element tag Shape Required attributes
rect rectangle x, y, height, width
circle circle cx, cy, r
text text x, y, some text inside the tag
path shapes/lines d
g a group of elements none, but generally something like transform="translate(100,100)"
image image x, y, xlink:href, height, width
line line x1, y1, x2, y2

For more information, you should definitely check out Mozilla’s reference.