The OpenDocument Format (ODF) is an open XML-based document file format for office applications to be used for documents containing text, spreadsheets, charts, and graphical elements. The file format makes transformations to other formats simple by leveraging and reusing existing standards wherever possible. As an open standard under the stewardship of OASIS, OpenDocument also creates the possibility for new types of applications and solutions to be developed other than traditional office productivity applications.
Connection information file created by Microsoft Excel, a spreadsheet application included with Microsoft Office; contains properties to connect to, and retrieve data from, an external data source; may include a connection string, data queries, authentication information, and other settings. Office Data Connection (ODC) files are used to store reusable connection and data query information. This is useful for sharing connection information, as well as for performing periodic data refreshes within an Excel workbook.