S LocationData table
|location_name||text||unique ID, name of the location in s_dispo table and Boarding Loc and on this wiki|
|attribute_name||text||name of the attribute, e.g. "bed count"; there should be a wiki page for each of these to explain how they are used and how they tie into queries and reports|
|attribute_value||text||value of the attribute, e.g. "15" in case of bed number|
|Start_DtTm||date||when this location-attribute-value combination becomes active|
|End_DtTm||date||when this location-attribute-value combination stops|
End_DtTm is not needed for complete info, and in fact could become inconsistent, but it will make it easier to use this data in queries. Since updates will be rarer than use we decided to include the End_DtTm explicitly.