Rangkohärenz
Rangkohärenz is a concept in information retrieval and natural language processing that measures the consistency of a set of documents with respect to the distribution of ranked topics or query terms. It quantifies how coherently a collection of top‑retrieved documents reflect a particular thematic or semantic grouping expressed by a query. The term is derived from the German words Rank (ranking) and Kohärenz (coherence), and has been used in computational linguistics research to evaluate search engines, clustering algorithms, and query expansion techniques.
In practice, rangkohärenz is computed by comparing the ranked list of documents returned by a retrieval system
The metric has been employed to benchmark search engines in academic studies, to validate entity‑recognition pipelines,