The World Wide Web quickly evolved as a valuable resource for organizations to provide information and services to users. Much initial development of Web pages was done haphazardly. This resulted in many information gaps and inconsistencies between pages. Departments with more available time created more and better-designed Web pages even when they were no more important. Personnel who created Web pages would move to other jobs and their pages would become obsolete, but no one would bother to fix them. Two copies of the same information on the Web would become inconsistent when only one was updated, leaving the public wondering which was correct. Solutions were needed. We survey here the principal solution methods that have been developed.