These are all the possible values for the IG_ISIS_TAG_FEEDER tag.
| IG_ISIS_FEEDER_FEED | Scanner has a feeder. |
| IG_ISIS_FEEDER_FLAT | Scanner has a flatbed. |
| IG_ISIS_FEEDER_TELLFLAT | Scanner can detect whether or not a page is on the flatbed. |
| IG_ISIS_FEEDER_TELLFEED | Scanner can detect whether or not a page is in the feeder. |
| IG_ISIS_FEEDER_TELLSCAN | Scanner can detect whether a page is loaded in the feeder only by committing a page. |
| IG_ISIS_FEEDER_CENTERFEED | Scanner can center a page in the feeder. |
| IG_ISIS_FEEDER_CENTERFLAT | Scanner can detect whether or not a page is centered on the flatbed. |
| IG_ISIS_FEEDER_PAUSE | Scanner can safely stop a ScanAhead batch in the middle of the batch and recover all pages left in the buffer. |