A topic map-based system is being developed that will allow users to narrow a catalog of over 36,000 different sources to a manageable level by navigating over 9 separate dimensions (or metadata axes). This system will enhance searching capabilities and help users to find the best sources for their particular information needs more efficiently. This paper discusses the business case for developing such a system and describes the implementation and design decisions made. A demonstration of the system will be included as part of the conference presentation.