Abstract: Methods, apparatuses, and systems for content management and search refinement are described. Embodiments of the present disclosure include search refinement systems configured to identify the most relevant data attributes (e.g., facets) for filtering search results. For example, a user may provide a search query, and a search engine may retrieve a set of search results in addition to providing facets (e.g., data attributes associated with search result objects from the retrieved set of search results) for user search refinement of the retrieved search results. In some embodiments, facets are scored using a significance heuristic, which is used to determine and select facets that provide the most information gain given a set of search results. Selected facets may be presented to a user as filtering options for narrowing a retrieved set of results.