Enforce identical Viewer feature types

CHANGELOG.md

@@ -19,6 +19,9 @@
 - Replaced the combined `default/train` surface with separate
   `canonical/archive` and `pre_standard/archive` configurations.
 - Made `canonical` the default configuration.
+- Declared the full feature contract inside each builder configuration so the
+  generated Parquet schemas remain identical even when a source CSV column
+  happens to contain only integer-looking values.
 - Declared stored dimensions and byte sizes as integers and `has_audio` as a
   boolean; retained floating-point frame rate for historical encodings.
 - Continued to exclude the nested provenance subtree through direct-file

README.md

@@ -151,12 +151,130 @@ dataset_info:
 configs:
 - config_name: canonical
   default: true
+  features:
+  - name: video
+    dtype: video
+  - name: record_id
+    dtype: large_string
+  - name: collection_tier
+    dtype: large_string
+  - name: is_canonical
+    dtype: bool
+  - name: acquisition_protocol_version
+    dtype: large_string
+  - name: date
+    dtype: large_string
+  - name: time
+    dtype: large_string
+  - name: tool
+    dtype: large_string
+  - name: medium
+    dtype: large_string
+  - name: support
+    dtype: large_string
+  - name: dimensions
+    dtype: large_string
+  - name: duration_seconds
+    dtype: float64
+  - name: width_px
+    dtype: int64
+  - name: height_px
+    dtype: int64
+  - name: orientation
+    dtype: large_string
+  - name: encoded_frame_rate
+    dtype: float64
+  - name: video_codec
+    dtype: large_string
+  - name: pixel_format
+    dtype: large_string
+  - name: container
+    dtype: large_string
+  - name: has_audio
+    dtype: bool
+  - name: hub_xet_hash
+    dtype: large_string
+  - name: original_filename
+    dtype: large_string
+  - name: provenance_status
+    dtype: large_string
+  - name: legacy_provenance_path
+    dtype: large_string
+  - name: legacy_related_references
+    dtype: large_string
+  - name: evidence_method
+    dtype: large_string
+  - name: provenance_reference_duration_delta_seconds
+    dtype: float64
+  - name: size_bytes
+    dtype: int64
+  - name: notes
+    dtype: large_string
   data_files:
   - split: archive
     path:
     - metadata.csv
     - Standard_Time_Lapses/*.mp4
 - config_name: pre_standard
+  features:
+  - name: video
+    dtype: video
+  - name: record_id
+    dtype: large_string
+  - name: collection_tier
+    dtype: large_string
+  - name: is_canonical
+    dtype: bool
+  - name: acquisition_protocol_version
+    dtype: large_string
+  - name: date
+    dtype: large_string
+  - name: time
+    dtype: large_string
+  - name: tool
+    dtype: large_string
+  - name: medium
+    dtype: large_string
+  - name: support
+    dtype: large_string
+  - name: dimensions
+    dtype: large_string
+  - name: duration_seconds
+    dtype: float64
+  - name: width_px
+    dtype: int64
+  - name: height_px
+    dtype: int64
+  - name: orientation
+    dtype: large_string
+  - name: encoded_frame_rate
+    dtype: float64
+  - name: video_codec
+    dtype: large_string
+  - name: pixel_format
+    dtype: large_string
+  - name: container
+    dtype: large_string
+  - name: has_audio
+    dtype: bool
+  - name: hub_xet_hash
+    dtype: large_string
+  - name: original_filename
+    dtype: large_string
+  - name: provenance_status
+    dtype: large_string
+  - name: legacy_provenance_path
+    dtype: large_string
+  - name: legacy_related_references
+    dtype: large_string
+  - name: evidence_method
+    dtype: large_string
+  - name: provenance_reference_duration_delta_seconds
+    dtype: float64
+  - name: size_bytes
+    dtype: int64
+  - name: notes
+    dtype: large_string
   data_files:
   - split: archive
     path:

VALIDATION.md

@@ -35,6 +35,11 @@ content identities were read from the Hub repository inventory.
 | Stored-orientation conflicts | 0 |
 | Duplicate active content hashes | 0 |
 
+Both Hub builder configurations explicitly declare the same 29 features. This
+prevents per-CSV inference from representing an integer-only canonical
+`encoded_frame_rate` column as `int64` while representing historical
+fractional rates as `float64` in the Pre-Standard configuration.
+
 ## Audited statistics
 
 - Total indexed playback duration: 50.06 hours