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By browsing data dictionaries you will find needed fiields. If there are no required fields then a request has to be raised.
In our example we want to save Thomson scattering data, let's browse this ids.
We can imediately notice that there are structures introduced in imas version 3.32.1. Apart from experimentally measured values we can also save other experimental data like coordinates of lin-of-sight of particular measurement.
Data is structured in such a way that we have to choose channel first to browse further for place to save measured values: