The description of the error typology has been brought into line with the actual contents of the error_type field

README.md

@@ -34,7 +34,7 @@ In addition, for some samples there is a corrected version of the text ("fixed_s
         "sentence": "Разучи стихов по больше",
         "fixed_sentence": "Разучи стихов побольше",
         "label": 0,
-        "error_type": "Misspelling",
+        "error_type": "Tokenization",
         "domain": "prose"
 }
 ```
@@ -64,7 +64,7 @@ A few poetry samples are included in this version:
         "sentence": "Чему научит забытьё?\nСмерть формы д'арует литьё.\nРезец мгновенье любит стружка...\nСмерть безобидная подружка!",
         "fixed_sentence": null,
         "label": 0,
-        "error_type": "Syntax",
+        "error_type": "Grammar",
         "domain": "poetry"
 }
 ```
@@ -77,22 +77,75 @@ A few poetry samples are included in this version:
 **sentence** (str): the original sentence.  
 **fixed_sentence** (str): the corrected version of original sentence.  
 **label** (str): the target class. "1" for "acceptable", "0" for "unacceptable".  
-**error_type** (str): the violation category: Misspelling, Syntax, Semantics, or Hallucination.  
+**error_type** (str): the violation category: Spelling, Grammar, Tokenization, Punctuation.  
 **domain** (str): domain: "prose" or "poetry".
 
+### Error types
+
+**Tokenization**: a word is split into two tokens, or two words are merged into one word.
+
+```
+{
+        "id": 6,
+        "sentence": "Я подбираю по проще слова",
+        "fixed_sentence": "Я подбираю попроще слова",
+        "label": 0,
+        "error_type": "Tokenization",
+        "domain": "prose"
+}
+```
+
+**Punctuation**: missing or extra comma, hyphen or other punctuation mark
+
+```
+{
+        "id": 5,
+        "sentence": "И швырнуть по-дальше",
+        "fixed_sentence": "И швырнуть подальше",
+        "label": 0,
+        "error_type": "Punctuation",
+        "domain": "prose"
+}
+```
+
+**Spelling**:
+
+```
+{
+        "id": 38,
+        "sentence": "И ведь что интересно, русские официально ни в одном крестовом позоде не участвовали.",
+        "fixed_sentence": "И ведь что интересно, русские официально ни в одном крестовом походе не участвовали.",
+        "label": 0,
+        "error_type": "Spelling",
+        "domain": "prose"
+}
+```
+
+**Grammar**: One of the words is in the wrong grammatical form, for example the verb is in the infinitive instead of the personal form.
+
+```
+{
+        "id": 61,
+        "sentence": "на него никто не польститься",
+        "fixed_sentence": "на него никто не польстится",
+        "label": 0,
+        "error_type": "Grammar",
+        "domain": "prose"
+}
+```
+
+Please note that error categories are not always set accurately, so you should not use
+the "error_type" field to train classifiers.
+
+
 ### Statistics
 
 
-Total number of samples in test split: **5829**  
+Total number of samples in test split: **6244**  
 Total number of samples in train split: **435538**  
 
 Statistics for test split.
 
 Domains:  
-prose	5220  
+prose	5635  
 poetry	609  
-
-Violation categories:  
-Misspelling	3266  
-Syntax	2555  
-Semantics	8