[iso_3166-2] remove hash field, rank code and name first

README.md

@@ -2,7 +2,6 @@
 tags:
 - name
 - lang
-- hash
 - iso-3166
 - subdivisions
 configs:
@@ -50,22 +49,20 @@ dataset_info:
   dataset_size: 1167519
 ---
 
-# ISO 3166-2 Subdivision Codes with Lang and Hash
+# ISO 3166-2 Subdivision Codes with Lang
 
-Regional subdivision codes with language selection and deterministic hashing.
+Regional subdivision codes with language selection.
 
 ## Fields
 
 - **code** (string): ISO 3166-2 subdivision code (e.g., 'US-CA', 'RU-MOW')
-- **region** (string): Parent ISO 3166-1 alpha-2 region code
 - **name** (string): Primary name in selected language
+- **region** (string): Parent ISO 3166-1 alpha-2 region code
 - **name_en** (string): English name
 - **name_ru** (string): Russian name
 - **name_zh** (string): Chinese name
 - **lang** (string): Language of primary name field (en, ru, or zh)
   - Determined by parent region's language rule
-- **hash** (string): SHA256 hash of `name` field (64 hex chars)
-  - Used for sharding and collision detection
 - **parent** (string): Parent subdivision code (if applicable)
 - **children** (list): Child subdivision codes
 - **names_en_alt** (list): Alternative English names
@@ -79,14 +76,6 @@ Regional subdivision codes with language selection and deterministic hashing.
 
 Languages are determined by parent region using hardcoded mapping (same as iso_3166-1_alpha-2).
 
-## Hash Field
-
-The `hash` field is the SHA256 hash of the `name` field:
-- Format: 64-character hexadecimal string
-- Deterministic: same name always produces same hash
-- Used for entry sharding in doc repositories (first 6 hex chars = shard ID)
-- Enables collision detection
-
 ## Usage
 
 ```python
@@ -98,17 +87,16 @@ ru_subdivs = ds.filter(lambda x: x['region'] == 'RU')
 print(ru_subdivs[0])
 # {
 #   'code': 'RU-MOW',
-#   'region': 'RU',
 #   'name': 'Москва',
+#   'region': 'RU',
 #   'lang': 'ru',
-#   'hash': '...'
 # }
 ```
 
 ## See Also
 
-- `cterdam/iso_3166-1_alpha-2`: Countries/regions with lang and hash
-- `cterdam/iata-metro`: IATA metro codes with lang and hash and coordinates
+- `cterdam/iso_3166-1_alpha-2`: Countries/regions with lang
+- `cterdam/iata-metro`: IATA metro codes with lang and coordinates
 
 
 ## Invariants
@@ -128,19 +116,13 @@ All entries in this dataset maintain the following invariants (verified by `test
   - **Sinophone regions** (CN, TW, HK, JP, etc.) → `lang: zh`
   - **All others** → `lang: en`
 
-### Hash Field
-- **Required**: Every entry with a non-null `name` has a `hash` field
-- **Format**: 64-character hexadecimal string (SHA256)
-- **Constraint**: `hash == SHA256(name)`
-- **Usage**: First 6 hex digits used for sharding in source repositories
-
 ## Verify Invariants
 
 Clone the dataset and run tests:
 
 \`\`\`bash
-git clone https://huggingface.co/datasets/cterdam/iso_3166-1_alpha-2
-cd iso_3166-1_alpha-2
+git clone https://huggingface.co/datasets/cterdam/iso_3166-2
+cd iso_3166-2
 
 # Install dependencies
 pip install datasets