Have just checked and all annotations are null.
I don't know what the format should be, but there is something that strikes me as odd.
All of the fields have 3 sets of quotes, with the exception of metric1, metric2, md5 and thumbnail which only have 1.
This is the beginning of the file, up to the end of the first thumbnail (I have truncated the metrics and thumbnail fields so they fit on the page):-
idVol="""1"""
vtype="""3"""
serialno="""2900577186"""
maxcomplen="""255"""
vchar="""65470719"""
filesystem="""NTFS"""
label="""Data"""
netname="""\\AMD-3GHZ\d$"""
alias=""""""
idPath="""1"""
idVol="""1"""
pathtype="""1"""
name=""""""
idPath="""2"""
idVol="""1"""
pathtype="""1"""
name="""Users\Public\Pictures\Deb Train Meal"""
idThumb="""1"""
idPath="""1"""
idFiletype="""0"""
file_time_iso="""2007-11-07T08:00:40.000"""
thumbnail_time_iso="""2013-06-27T19:40:58.956"""
taken_time_iso=""""""
filelength="""5686"""
checksum="""4263651906"""
width="""96"""
height="""48"""
horiz_res="""2834"""
vert_res="""2834"""
colortype="""2"""
colordepth="""8"""
gamma="""0"""
thumbnail_width="""96"""
thumbnail_height="""48"""
thumbnail_type="""518"""
thumbnail_size="""311"""
idUser="""1"""
idHost="""1"""
name="""DSCF4924.JPG"""
rating="""0"""
xmp=""""""
metric1="00000000000000000000000000000"
metric2="00000000000000000000000000000"
md5="06fba95313f26e300917c6cea4480890"
thumbnail="ffd8ffe000104a46494600010100"
annotation=""""""