Coverage Statistics

The ATB4 (Arabic Treebank: Part 4 v1.0) Corpus contains 161,914 tokens, 
of which 15,423 are punctuation, numbers, and Latin strings, and 
146,491 are Arabic word tokens. 

Punctuation, Numbers, Latin strings       15,423
Arabic Word Tokens                       146,491
------------------------------------------------
TOTAL                                    161,914



Of the 146,491 Arabic word tokens, 145,043 (99.01%) were provided 
with an accurate morphological analysis and POS tag by the Buckwalter 
Arabic Morphological Analyzer, and 1,448 (0.99%) Arabic word tokens 
were judged to be incorrectly analyzed, and 736 cases were provided 
with a Comment describing the nature of the inaccuracy.


Accurately parsed Arabic Word Token    145,043  99.01%
Commented Arabic Word Tokens             1,448   0.99%
------------------------------------------------------
TOTAL                                  146,491 100.00%



The 736 Annotator Comments show that most of the words that were not 
provided with a correct morphological analysis were passive verb 
forms (see table below). 

============================================
ANNOTATOR COMMENTS ON ITEMS WITH NO SOLUTION
============================================
TYPO                                     137
PASSIVE_FORM                             136
SHOULD_BE_ADJ                             81
SEGMENTATION PROBLEM                      71
SHOULD_BE_NOUN                            56
IMPERATIVE                                44
PLURAL                                    23
GRAMMAR_PROBLEM                           17
ABBREVIATION                              15
MISSING_HAMZA_PROBLEM                     15
DIALECTAL_FORM                            10
A_NAME                                     2
MISC (no comment)                        129
--------------------------------------------
TOTAL                                    736
============================================