This transformation can be used to select a location from the input time series set based on a attribute value and copy the associated values to the output time series. The selection will be done by using the attributeFunctionId.
The 'attributeFunctionId' should contain an Id (or reference to an attribute of the outputseries) that is present in the input timeseriesset. This location will then be used and copied to the output timeseriesSet. For example, for selecting an measurement location within a certain area. Interactive selection is possible in the modifierDisplay using a dropdownlist
The following example will explain this in more detail. Lets say we are running this transformation for outputLocation outputA and attributeFunctionId is set to @selected_location@. There is one input time series configured with locationB and locationC. outputA has value locationB assigned to the attribute selected_location. The result of the transformation will be that the input series of locationB is copied to the output series for outputA. By using a location-attributemodifier for outputA, the user may switch to copy the series of locationC.