def define_itemdata(itemid, item1, item2):
    """
    Defines the various pieces of information to be collected for each pair.
    Returns a dictionary that already includes the pairs' text but not data.
    """
    itemdata = {"itemid": itemid,
                "version1": item1,
                "version2": item2,
                "lev-dist": "NA",
                "lev-dist-class": "NA",
                "lendiff-chars": "NA",
                "lendiff-words": "NA",
                "category": "NA",
                "main-type": "NA",
                "insertion": 0,
                "deletion": 0,
                "capitalization": 0,
                "whitespace": 0,
                "italics": 0,
                "punctuation": 0,
                "hyphenation": 0,
                "numbers": 0,
                "condensation": 0,
                "expansion": 0,
                "tbc": 0}
    return itemdata