A separate database contains all the information in a highly strucutured form, allowing us to manipulate the data in various ways. All the matrix and set HTML pages are automatically generated from this database. The database also supports both structured and free-text retrieval. The matrix collection may also be browsed by collection, application domain, or contributor. Matrix Market provides a Database Query tool with an HTML form interface that allows the user to specify a large variety of attributes describing selection criteria for matrices.
Text fields allow the user to specify the minimum and maximum number of rows, columns, and nonzeros.
Additional buttons allow the user to request that right-hand sides, exact solution, or initial vectors be made available. A text field allows the user to specify patterns to match in the database text descriptions of the matrices. Help text is provided for each of the available selection criteria. Only matrices that satisfy all of the requirements specified by the user are retrieved. Matches are returned on an HTML page organized by matrix set.