Solutions: Teragram Taxonomy Manager: "Traditional Constraints
One difference between popular World-Wide-Web directories and directories that companies want to build is the fact that the WWW directories are usually built entirely by hand. In other words, each category will have its own editor or set of editors that will be responsible for the content on this category. While this solution generally provides very high quality data organization; it has two main drawbacks:

The cost of building a good directory may be prohibitive because of the labor involved;

The speed at which the directory can be updated with new data is limited by the speed at which new information can be processed. "