Define the term profile in building – NABTEB QUESTION

Profiles are established at the corners of the building and also at intersections and used for securing 25mm or 100 x 25mm nailed to 50 x 50mm posts or pegs driven firmly into the ground, saw cuts or nails demarcate the width of walls and the spread of foundations: And the bricklayer sets his lines to these and when working below ground, plumbs down from them at the corners of the building