1. A method providing computer-implemented content propagation for enhanced document retrieval, the method comprising: identifying reference information directed to one or more documents, the reference information being identified from one or more sources of data independent of a data source comprising the one or more documents; extracting metadata that is proximally located to the reference information; calculating relevance between respective features of the metadata to content of associated ones of the one or more documents; for each document of the one or more documents, indexing associated portions of the metadata with the relevance of features from the respective portions into original content of the document; and wherein the indexing generates one or more enhanced documents.