re: opf, hash ids, ids, etc

The following section towards the end of the opf file
seems to be repeated for each time the track is
checked out.

>197    2:     INTEGER 102
> 200 NDEF:     SEQUENCE {
> 202 NDEF:       SEQUENCE {
> 204    4:         OCTET STRING 01 0F 50 00 00 06 00
00 >00 00 00 00 00 
>00 00 01
> 222    2:         INTEGER 0

>REMARK: If this part is present, the above octet
string >seems to be
>constant.

> 225    4:         OCTET STRING 20 93 A8 F3 7A 7A 4E
ED
>REMARK: Something interesting!  This is the HashID,
the >hash of the 20 
>byte
>identifier (the one used in the filename???).

so for a track that I've checked out three times I
have:

144 30 NDEF:     SEQUENCE {
 146 30 NDEF:       SEQUENCE {
 148 04   16:         OCTET STRING
            :           01 0F 50 00 00 06 00 00 00 00
00 00 00 00 00 01
 166 02    1:         INTEGER 0
 169 04    8:         OCTET STRING
            :           11 43 09 8D AA E8 0B F3
            :         }
 181 30 NDEF:       SEQUENCE {
 183 04   16:         OCTET STRING
            :           01 0F 50 00 00 06 00 00 00 00
00 00 00 00 00 01
 201 02    1:         INTEGER 0
 204 04    8:         OCTET STRING
            :           11 43 09 8D AA E8 0B F3
            :         }
 216 30 NDEF:       SEQUENCE {
 218 04   16:         OCTET STRING
            :           01 0F 50 00 00 06 00 00 00 00
00 00 00 00 00 01
 236 02    1:         INTEGER 0
 239 04    8:         OCTET STRING
            :           11 43 09 8D AA E8 0B F3
            :         }
            :       }
            :     }
There is nothing different between these
entrys.Perhaps the Octet string hash ID is generated
partially based on 
some features of the track and partially based on a
unique ID that each MD player has. The entries for
tracks would then have differing Hash ID's if  checked
out to different MD Players.


The 1 3 8 0 5 4 102 bit does seem constant. The fourth
number corresponds to the number of times more the
track 
is allowed to be checked out
ie 1 3 8 3 5 4  == three times remaining (you haven't
checked this track out)

1 3 8 0 5 4 == no times remaining you have this track
checked out three times already. There should then be
three entries in the check out section.

Cheers

Matt

[email protected]
1 3 8 2 5 4  ==


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