im taking a guess, but I gather they dont want soapy products as have problems in the past, for example if you use a detergent on a floor it has the same affects as on carpets and if not extracted or rinsed wil leave the floor sticky, in a pub this is a disaster because this catalists with the bear as well, but not knowing what the floor is or how it is maintained it's difficult to resolve
but for example Flash low soap low foam less sticky
Floor maintainer low foam but contains waxs and emsilfiers (sticky unless buffed)
The best thing is 'less is more' the least cleaner product and more elboy grease the better