calibration_files/inventory.csv
- Please rename this to collection_inventory.csv or even collection.csv

kem1_*/*.lblx
- All have
  <?xml-model href="https://pds.nasa.gov/pds4/img/v1/PDS4_IMG_1J00_1900.sch"
  <?xml-model href="https://pds.nasa.gov/pds4/sp/v1/PDS4_SP_1J00_1320.sch"
    ...
    https://pds.nasa.gov/pds4/img/v1/PDS4_IMG_1J00_1900.xsd"
    https://pds.nasa.gov/pds4/sp/v1/PDS4_SP_1J00_1320.xsd"
but that version doesn't exist. Probably replace those with
  PDS4_IMG_1J00_1890 and PDS4_SP_1J00_1311
- Suggestion: to match the context product's Instrument/name, change
  <name>LEISA</name> and
  <name>Ralph LEISA</name>
to
  <name>LINEAR ETALON IMAGING SPECTRAL ARRAY</name>
- Suggestion: to match the context product's Instrument_Host/name, change
  <name>New Horizons Spacecraft</name>
to
  <name>NEW HORIZONS</name>
- Suggestion: to match the context products' Target/name, change
  <name>Asteroid 486958 (2014 Mu69)</name> and
  <name>Arrokoth</name>
to
  <name>(486958) 2014 MU69</name>
- Each data label has a lid_reference to
  urn:nasa:pds:nh_documents:leisa:leisa_ssr
but that LID hasn't been seen yet, which may be ok. Perhaps this is wanted:
  urn:nasa:pds:nh_documents:ralph:ralph_ssr
- Various labels have lid_ or lidvid_references to unknown LIDS:
  urn:nasa:pds:nh_leisa:calibration_files:cal_map_pflat4x
  urn:nasa:pds:nh_leisa:calibration_files:flat_map_pflat4x
  urn:nasa:pds:nh_leisa:calibration_files:pixel_map_20160824
  urn:nasa:pds:nh_leisa:calibration_files:wave_map
but these aren't in this bundle. These LIDs do exist:
  urn:nasa:pds:nh_leisa:calibration_files:overview
  urn:nasa:pds:nh_leisa:calibration_files:anglemap
  urn:nasa:pds:nh_leisa:calibration_files:bondjointflaringmaskmap
  urn:nasa:pds:nh_leisa:calibration_files:calmap
  urn:nasa:pds:nh_leisa:calibration_files:elecmap
  urn:nasa:pds:nh_leisa:calibration_files:errormap_v0
  urn:nasa:pds:nh_leisa:calibration_files:flatmap
  urn:nasa:pds:nh_leisa:calibration_files:pixelmap
  urn:nasa:pds:nh_leisa:calibration_files:wavemap

kem1_*/overview.lblx
- Use https for URLs, so this
  schemaLocation="http://pds.nasa.gov/pds4/pds/v1 http://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1J00.xsd
should be
  schemaLocation="http://pds.nasa.gov/pds4/pds/v1 https://pds.nasa.gov/pds4/pds/v1/PDS4_PDS_1J00.xsd