Update README.md

README.md

@@ -4,12 +4,12 @@ configs:
   data_files:
   - split: train
     path:
-    - "wiki/archive/v1/documents/*.jsonl.gz"
+    - "wiki/archive/v2/documents/*.jsonl.gz"
 - config_name: wikiteam
   data_files:
   - split: train
     path:
-    - "wiki/archive/v1/documents/*.jsonl.gz"
+    - "wiki/archive/v2/documents/*.jsonl.gz"
 - config_name: wikimedia
   data_files:
   - split: train
@@ -18,4 +18,15 @@ configs:
 ---
 
 # Wiki Datasets
-##
+##
+
+Preprocessed versions of openly licensed wiki dumps collected by wikiteam and hosted on the Internet Archive.
+
+## Version Descriptions
+
+* `raw`: The original wikitext
+* `v0`: Wikitext parsed to plain text with `wtf\_wikipedia` and conversion of math templates to LaTeX.
+* `v1`: Removal of some html snippets left behind during parsing.
+* `v2`: Removal of documents that basically just transcripts of non-openly licensed things.
+
+Note: The `wikiteam3` scraping tool, used for most of the dumps, doesn't format edits to pages as `revisions` in the xml output, instead it creates new `pages`. Thus some documents in this dataset are earlier versions of various pages. For large edits this duplication can be benificial, but results in near-duplicate documents for small edits. Some sort of fuzzy deduping filter should be applied before using this dataset.