11. A computer program product, comprising: a computer readable storage medium having program code embodied therewith, the program code executable by a computer to cause the computer to: initiate, by the computer, a new document notification process in response to receipt of a new document, the new document notification process comprising: evaluating enhanced metadata of the new document via a relationship analyzing process to produce a priority list defining a likelihood of possible access, wherein the enhanced metadata includes a set of keywords and/or references from the new document; and store, by the computer, the new document in a storage tier of a hierarchical storage environment according to the priority list; receive a request to access the new document; accessing the new document; triggering and/or implementing a second document access notification process in response to the request, the second document access notification process comprising: determining documents that are related to the new document based on the enhanced metadata and the priority list; and placing the related documents in a highest level storage tier of the hierarchical storage environment.
14. The computer program product according to claim 11 , wherein the enhanced metadata includes the set of references, wherein the set of references comprises references selected from the group consisting of: references from a references section, hyperlinks, and titles of referenced documents.