However, project specific IDs have the obvious disadvantage that they are different from all others. One number could be used to identify different parts of the same piece of data. The BICI standard should be examined. The task is to create unique IDs and unique access, given that a user is interested in articles, not the whole book. Such high level results require such simple elements as, for example, the title.
More information is needed about standards.
More transparency on decision making processes. Try to find out which elements are meaningful for the user. You might establish a test group. It is important to put constraints on the project in order to make aims clearer. The results of this work are documented in a number of internal papers and reports.