1. A method, comprising: creating, by a decay computation component of a search engine, a modifier value in a modifier type metadata field of a first object, the decay computation component embodied on a non-transitory computer readable medium, the search engine communicatively connected to a controlling application over a network connection, the modifier type metadata field defined by the controlling application; and in response to a transaction issued by the controlling application and received by the search engine, the decay computation component of the search engine adjusting the modifier value in the modifier type metadata field of the first object towards a resting value.