The document discusses the Musica migrans project, which uses topic maps to create a portal about the migration of Eastern European musicians in the 19th century. It describes how the project began from discussions between historians about collecting biographical data on lesser-known musicians. Topic maps were identified as a good way to represent the relationships in the data. The document outlines how topic maps meet the needs of the project and discusses the technical implementation using an open source PHP-based topic maps engine. It provides an overview of the current status of the Musica migrans portal and ideas for future enhancements.