In various embodiments, systems and methods are provided that can facilitate searching for entities, such as rules, that apply to search criteria. The disclosed systems and methods can reduce some of the performance bottlenecks associated with, for example, rules-based search systems by using metadata. The metadata may be generated to reduce the size of information about a set of entities that is required to be searched. In some embodiments, the metadata may represent one or more tuple elements, such as keys and values of keys in key-value pairs.