spacetelescope · stscieisenhamer · Oct 12, 2021 · Sep 8, 2021 · Oct 12, 2021
diff --git a/CHANGES.rst b/CHANGES.rst
@@ -74,6 +74,10 @@ datamodels
 - Implement memmap argument when calling ``datamodels.open`` on an ASDF
   file. [#6327]
 
+- Fix bug in schema that disallowed valid p_grating values. [#6333]
+
+- Add ``NDArrayType`` to list of valid types for ``RegionsModel.regions``. [#6333]
+
 - Fix a bug in wcs_ref_models where SpecwcsModel was failing the SimpleModel
   validation as it contains a list of models rather than one simple model.
   Also add some missing allowed BAND values for MIRI MRS distortion

diff --git a/jwst/datamodels/schemas/keyword_pgrating.schema.yaml b/jwst/datamodels/schemas/keyword_pgrating.schema.yaml
@@ -13,5 +13,5 @@ properties:
           p_grating:
             title: Name of the grating element used
             type: string
-            pattern: ^((G140M|G235M|G395M|G140H|G235H|G395H|PRISM|MIRROR|N/A|ANY)\\s*\\|\\s*)+$
+            pattern: ^((G140M|G235M|G395M|G140H|G235H|G395H|PRISM|MIRROR|N/A|ANY)\s*\|\s*)+$
             fits_keyword: P_GRATIN
diff --git a/jwst/datamodels/wcs_ref_models.py b/jwst/datamodels/wcs_ref_models.py
@@ -1,6 +1,7 @@
 import traceback
 import warnings
 
+from asdf.tags.core import NDArrayType
 import numpy as np
 from astropy.modeling.core import Model
 from astropy import units as u
@@ -369,7 +370,7 @@ def to_fits(self):
     def validate(self):
         super().validate()
         try:
-            assert isinstance(self.regions, np.ndarray)
+            assert isinstance(self.regions, (np.ndarray, NDArrayType))
             assert self.meta.instrument.name == "MIRI"
             assert self.meta.exposure.type == "MIR_MRS"
             assert self.meta.instrument.channel in ("12", "34", "1", "2", "3", "4")