The following is a summary of the principal changes made to the POS 
taglist since the "Arabic Treebank: Part 3 v 1.0" corpus [LDC2004T11]):
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* the "OATH" POS tag was introduced for more precise tagging:

    wa/OATH+All~`h/NOUN_PROP+i/CASE_DEF_GEN
    by + Allah/God + [def.gen.]