Mayor Willie Brown filed one of them this week, two minutesbefore the deadline. The rival initiative, backed by slow-growthactivists, is called the "Daughter of Proposition M" in referenceto the 1986 slow-growth measure that set the 950,000-sf annual capon downtown high-rise construction.

Keeping the cap is one of the things the measures have incommon, but there are several key differences. Generally, though,both are trying to widen the reach Proposition M, whose backersnever envisioned a robust dot-com industry pushing the issue beyonddowntown and into South of Market, Mission District and PotreroHill.

"Daughter of Proposition M" would ban new offices in part ofSoMa and the Mission and suspend construction elsewhere in thoseneighborhoods as well as in Bayview-Hunters Point. It wouldrestrict office developments over 6,000 sf to fewer places,including downtown, port property, existing redevelopment projectareas and the Hunters Point Naval Shipyard.