1. A method for dynamically targeting and updating portions of an overloading index utilizing a dynamic update of index (DUI) object that exposes modified content of one or more documents, searchable via a merged index, the method comprising: determining that the DUI object is available; sending a request to download the DUI object; receiving the DUI object for use in updating the overloading index, wherein the DUI object includes an identifier of each of the one or more documents in which a modification to the content has occurred, and indicia of a relative position of the modified content within the one or more documents; translating each identifier of the one or more documents to a respective web page address mapped to the identifier; utilizing the respective web page address to translate the relative position of the modified content to an absolute location of the modified content; updating portions of the overloading index based on the modified content and the absolute location of the modified content; invoking an association process to group the merged index with the overloading index to facilitate searching the updated portions within the overloading index corresponding to the modified content without rewriting the entire overloading index.