Each displayed NDF (see Parameter SHOW) is described in a block of lines. The first line holds an integer index for the NDF followed by the path to that NDF. Note, this path is where the NDF was when the provenance information was recorded. It is of course possible that the NDF may subsequently have been moved or deleted.
The remaining lines in the NDF description are as follows.
In addition, a text file can be created containing the paths for the direct parents of the supplied NDF. See Parameter PARENTS.
When an existing NDF is used in the creation of a new NDF, the provenance system will copy selected records from the HISTORY component of the existing NDF and store them with the provenance information in the new NDF. The history records copied are those that describe operations performed on the existing NDF itself. Inherited history records that describe operations performed on ancestors of the existing NDF are not copied. [FALSE]
An input NDF is included in the provenance of an output NDF only if the DATA component of the input NDF is mapped for read or update access by the application. In other words, input NDFs which are accessed only for their metadata (e.g. WCS information) are not included in the output provenance of an application.
If a KAPPA application uses one or more input NDFs to create an output NDF, the output NDF may or may not contain provenance information depending on two things: 1) whether any of the input NDFs already contain provenance information, and 2) the value of the AUTOPROV environment variable. It is usually necessary to set the AUTOPROV variable to "1" in order to create output NDFs that contain provenance information. The exception to this if you are supplied with NDFs from another source that already contain provenance. If such NDFs are used as inputs to KAPPA applications, then the output NDFs will contain provenance even if the AUTOPROV variable is unset. However, setting AUTOPROV to "0" will always prevent provenance information being stored in the output NDFs.
KAPPA --- Kernel Application Package