A directory is, but not strictly limited to the following: an information bank, guide, reference, index, catalog, and or register. A directory is similar to a travel guide. For example, if a person desires to gain knowledge in a certain subject area, or perhaps locate individuals with similar interests or just experience subject matter that is foreign to them, then a directory is a logical starting point.
For sites detailing the historical figures and points about vampires.
May include a timeline, historical people, stories about beginnings, etc.