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Table 1 (Non) - normalised Data Usage Index (DUI) indicators
| Measure | Description | |
|---|---|---|
| 1 | Visits | Number different visits (by IP address) |
| 2 | Unique Visits | Number of different first-time visits (by IP) |
| 3. | Loyal Visits | Number of visits repeatedly visiting a unit |
| 4 | Download Events | Number of different visits making a download |
| 5 | Download Frequency | Number of downloaded records from a unit (also distribution over units) - by visitor type |
| 6 | Download Volume | Size in MB - can be averaged |
| 7 | Download Impact | Download Freq. D(u) over stored records r(u) in unit: D(u)/r(u) |
| 8 | Avg. Download Freq. | Download Freq. per Event d(u): D(u)/d (u) |
| 9 | Usage Ratio | Ratio of Download Events over Visits v(u) for unit u: d(u)/v(u) - by visitor type |
