Marks the stage in the data-flow life cycle. E.g. <ul> <li>first digitisation of as-is quality checked data (first assembly of digital inventory).</li> <li>Insertion of topological nodes to divide-and-rule</li> <li>Version bumping</li> </ul> Similar to <i>planningType</i> attribute in project stage meta data. SNCF: not stored in plans because done in the data factory. DB: Planung_G_Art_Besonders