| initialize-PWS.History-method | S4 Initializer function | 
| initialize-PWS.Query.Subset-method | S4 PWS.Query.Subset Initializer function | 
| PWS.Hist.Chicago | Chicago History Dataset | 
| PWS.History | PWS.History constructor function | 
| PWS.History-class | PWS.History An S4 class to store history data related to PWS... | 
| PWS.Loc.Chicago | Chicago Locations Dataset | 
| PWS.Loc.Sub.Chicago | Chicago History Dataset | 
| PWS.Query.Subset | PWS.Query.Subset constructor function | 
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