1. A method of searching data, comprising: using a searchable index to determine which, if any, data objects from current production data and a set of backup data are responsive to a search query, wherein a data object in the set of backup data corresponds to a version of the production data as the production data existed when a backup operation was performed; in the event that a plurality of data objects is responsive to the search query: determining from the plurality of data objects responsive to the search query a subset of related data objects that are related to each other; determining from the subset of related data objects a first data object that comprises a version of one or more other data objects included in the subset of related data objects; and generating for the search query a search result that includes data that indicates version relationships between the first data object and the one or more other data objects included in the subset of related data objects; in the event no data object is responsive to the search query, generating said search result to indicate that no data object is responsive to the search query; and presenting, via a display at an interface device, the search result.
7. The method as recited in claim 1 , wherein the searchable index includes an index data indicating a location within the set of backup data of a data object comprising the set of backup data and/or index data from multiple data sources, backup types, or backup instances.