Item Update supports an undo feature for all actions except bitstream deletion. However, unlike Item Import, there is no resume feature for incomplete processing.There is more extensive logging with a summary statement at the end with counts of successful and unsuccessful items processed.The mandatory argument indicates the metadata fields in the dublin_file to be added unless already present (multiple fields should be separated by a semicolon ';').However, duplicate fields will not be added to the item metadata without warning or error.Item Update is a batch-mode command-line tool for altering the metadata and bitstream content of existing items in a DSpace instance.It is a companion tool to Item Import and uses the DSpace simple archive format to specify changes in metadata and bitstream contents.
All these actions can be combined in a single batch run.
If so, indeed the best way to do it is to add a hidden bit column, or an int column if you want to cheaply store changed flags for several columns.
Test and set in the Item Updating, then read in the Item Updated.
metadata field refers to a specific instance pairing a metadata element to a value.
As with Item Importer, the idea behind the DSpace's simple archive format is to create an archive directory with a subdirectory per item.