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@@ -14,3 +14,19 @@ Both Fahrzeuglexikon PDF and generated PNG/SVG/JSON files are Open Data.
 
 * [DB Fahrzeuglexikon License](https://data.deutschebahn.com/dataset/fahrzeuglexikon)
 * [PNG/SVG/JSON License](https://lib.finalrewind.org/dbdb/db_wagen/COPYING)
+
+## Naming Schema
+
+For standalone carriages (IC, IC2 Twindex), the filename is the wagon type.
+E.g. "Bimmdzf.png" or "DBpza.png".
+
+For ICE 1, 2, 3 (model 407), 4, and T (model 415) trains, the filename uses
+positions 5 through 9 of the UIC wagon number. E.g. for IC2 KISS wagon 93 85 4
+110 617-6: "41106.png".
+
+For ICE 3 model 403/406 and ICE T model 411, the filename uses UIC positions 5
+through 9, followed by a character indicating wether it is a series 1, series
+2, or redesigned wagon. Example for a redesined ICE 3 (model 403) wagon:
+"54037.r.png".
+
+ICE Metropolitan and the 7-carriage ICE 4 variant are not supported.