Position:absolute without top/left/bottom/right values

Question

I need to take an element out of the flow an am using position:absolute; for that.

Now if I just set position:absolute; without giving any

Answer 1

I have done a test suite about "position: absolute;". ---> look at this

In summary:

the left edge of the containing block of an element set 'position: absolute' without top, right, bottom or left is probably the right margin edge of its previous inline box (ignoring white space)

the top edge of the containing block of an element set 'position: absolute' without top, right, bottom or left is probably the top edge of the containing block of the line box in which the element lives

But I cannot find any relevant specifications in w3.