1eTiefe

1eTiefe is a term used in German-language technical and online discussions to denote the first level of depth within a hierarchical structure. It is commonly encountered in descriptions of trees, graphs, or layered models where depth is measured from a root node outward. The term is often used as a labeling convention to distinguish the initial sublevel beneath the top level.

Etymology and interpretation of 1eTiefe are not uniformly agreed upon. The word combines Tiefe, the German word for depth, with the element 1e, which some readers interpret as the first level or sublayer, while others view it as a shorthand inspired by mathematical notation. Because there is no single canonical origin, usage and meaning can vary across communities and contexts.

In practice, 1eTiefe appears in contexts such as algorithm descriptions, data modeling, and content organization where depth levels are relevant. For example, in depth-limited searches or hierarchical categorization, 1eTiefe can designate the initial layer directly under the root. It may also be used informally to help distinguish between the root’s immediate children (1eTiefe) and deeper levels (2eTiefe, 3eTiefe, etc.). The precise interpretation often depends on the specific modeling approach or notation chosen by a project or discussion group.

See also: depth, tree depth, depth-first search, hierarchical modeling.