The Mauro Data Mapper is a web based tool which stores and manages descriptions of data. These can be descriptions of data already collected, such as databases or csv files. Or these can be descriptions of data you wish to collect or transfer between organisations, such as a specification for a webform or an XML schema...
Mauro Data Mapper represents both types of descriptions of data as Data Models. These are defined as a structured collection of metadata and effectively model the data that they describe.