A company called Microsystems used to have a product named D3: http://www.microsystems.com/pdfs/d3-success-stories.pdf http://www.microsystems.com/pdfs/d3-succe

A company called Microsystems used to have a product named D3: http://www.microsystems.com/pdfs/d3-success-stories.pdf http://www.microsystems.com/pdfs/d3-success-stories.pdf Unfortunately, they had to discontinue the product, in part due to a patent dispute Microsoft lost about how it uses XML in Word, if I remember properly. A solution like this needs to be flexible and allow the logic to be diverted by humans, but is a brilliant thing for real estate and other industries that are full of common books of contracts and rules.