Abstract
To realize efficient utilization of data resources on the Internet, we developed the database for databases named "Bio-metadatabase". Bio-metadatabase is not only the collection of URL for publicly available databases but also the collection of their access methods including parameters accepted by CGIs provided by the sites. We also expect that Bio-metadatabase will be a core resource to design the semantic Web services and allow us to create user-oriented work-benches for bioinformatics data analysis. In this paper, we described various aspects of our Bio-metadatabase and some ideas with this database such as the one-stop query data retrieval system from multiple sites and the workbench for evolutional analysis of influenza viruses.