they look at topography and undersite design. they look at setbacks, front setbacks, spacing. and they talk about the typical san francisco lot, 25 by 100 feet. how that lays out. mid block open space and the importance of contributing to these patterns. explains the patterns. and in some cases enhancements at special building locations. it does not necessarily get to some of these larger scales of how do you make a block where there is no block. what do you do with the street if there's street stops. if there's unusual patterns of streets. what is important about how the new project that comes in. so, what we're hoping is the u.d.g. simply provide an underlay for those things that are missed. we are also proposing that because the residential design guidelines are coming up, we believe as a revision project, that this issue could sunset and that we could then put some of that into the residential design guidelines. we still would want the urban design guidelines to apply for the nonresidential uses but that would be an option to say that they apply in those residential cases