(1) An appraisal principle that says the value of an improvement is the amount it adds to the value of the property as a whole,not the value of the improvement standing alone in a void. A backyard workshop in a prestigious neighborhood might not add any value at all and could be considered an eyesore detracting from value, but might be worth $10,000 in a different neighborhood.(2) A legal principle holding that if a judgment is collected against one who was held guilty of negligence,assault,defamation,fraud,or some other tort,then that person may obtain a contribution from others against whom the same judgment was rendered, for their proportionate share of the judgment.Likewise,persons jointly liable for a debt,such as partners or cotenants,are responsible to pay their share to the other if one pays the entire amount.