The WebServiceMasterConfig.txt file is a text file that maps from model ID strings to the location of the associated model files on the eSTEM server and is how the web service connects the model ID of an incoming request to the relevant offline model folder. It must exactly match the expected formatting, or the web service will fail to parse it and no models will be made available beyond those which have already been parsed correctly.
Each line of the file must either be blank, or contain one of a few global settings for the server or a single ID-to-model mapping. A line containing a mapping should start with model = and the model ID string. Currently this is expected to be a GUID generated by the export from the STEM Editor, but the web service treats it as just a string. This should be followed by a single tab character and then the relative path from the root of the offline area to the folder containing your exported model files and the associated WebServiceModelConfig.txt file.
At present the only global settings relate to activity logging of the web service as described in 8.4.4 Controlling activity logging and debug output.
Example contents of a master configuration file