The <clover-format>
type creates standalone format elements which can then be used across a number of reports. Standalone format elements are not compatible with Ant 1.4.1. You require at least Ant 1.5.1 to use this feature.
These standalone types support the same attributes and elements as the internal <format>
elements of the <clover-report>
task. To name the format, use the standard Ant "id" attribute.
See Sharing Report Formats for some usage examples.