Update README.md

README.md

@@ -289,7 +289,7 @@ It merges widely used benchmarks into a single schema with consistent fields and
   
 **Configs and coverage**
 
-- **`all`**: Unified view over all sources with extra metadata columns (`idx`, `source_idx`).
+- **`all`**: Unified view over all sources with extra metadata columns (`id`, `source`, `source_idx`).
 - **Source-specific configs:** `apt`, `mrpc`, `parade`, `paws`, `pit2015`, `qqp`, `sick`, `stsb`.
 
 **Size & splits (overall)**  
@@ -340,8 +340,9 @@ paws = load_dataset("aditeyabaral-redis/langcache-sentencepairs-v1", "paws")
 * `label` *(int64)* — Task label. `1` ≈ paraphrase/similar, `0` ≈ non-paraphrase/dissimilar. For sources with continuous similarity (e.g., STS-B), labels are integerized in this release; consult the source subset if you need original continuous scores.
 * *(config `all` only)*:
 
-  * `idx` *(string)* — Dataset identifier. Follows the pattern langcache\_{split}\_{row number}.
-  * `source_idx` *(string)* — Source-local row id. Follows the pattern {source name}\_{split}\_{row number}.
+  * `id` *(string)* — Dataset identifier. Follows the pattern `langcache\_{split}\_{row number}`.
+  * `source` *(string)* — Source dataset name.
+  * `source_idx` *(int64)* — Source-local row id.
 
 **Splits**