An extract refers to the process of obtaining data from either a DSS file or a WISKI database and mapping that data to a model alternative's required input record. The extract retrieves the source data and copies it into records stored in a centralized DSS file called forecast.dss. The forecast.dss file is then used to provide input data during a forecast's compute process. While DSS records can contain both gridded data and time series data, the WISKI connection currently supports time series data. The Extract Editor is used to set up extract groups that retrieve data from a WISKI database.
