key to identify the data
value which can be used by a custom action
;<additionaldata> is an element which may provide additional information as key-value pairs to certain custom actions. The particular key-value pairs you might use depend on the particular custom action.
Currently, there are two built-in custom actions consuming such data,
ChmodCompilerListener and and
ChmodInstallerListener, where relevant keys are
with integer values interpreted as permissions like in the Unix chmod:
If value begins with "
0" -> octal number,
otherwise is is a decimal number representing some permission.
These permissions are applied to the appropriate files either during the compilation of the package or while installing them later, depending on whether the consumer implements a CompilerListener or InstallerListener.