When you connect to the NBII Metadata Clearinghouse you will be able to search through metadata-based descriptions of biological data sets and information products from many different sources to identify those that meet your particular search criteria.
The NBII Metadata Clearinghouse: http://metadata.nbii.gov/
The NBII Home Page: http://www.nbii.gov/
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The Cataloguer can be used to conduct an inventory of electronic information or to organize information collected previously using other means (e.g., on paper forms). Information entered into the Cataloguer is stored in an MS Access database. Queries and reports can be created using the standard utilities in MS Access. Each user can search and manipulate the local database, but not someone elses database. Thats where the information-sharing capabilities of XML come in.