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MAW operates on MSI-levels [12] and categorizes annotations based on the levels
| Annotation level | MSI-level |
|---|---|
| Standard is given (information provided by the user) | 1 |
| Candidate present in either spectral databases or in more than one annotation source | 2 |
| Candidate only suggested by SIRIUS, and/or has a chemical class prediction | 3 |
| Molecular formula predicted | 4 |
| Only features measured with MS2 | 5 |
