Hello trid users,
some days ago i run TrID inside Novell DOS 7 directory.
16 of 20 files with msg file name extension are misidentified by
adf-gen.trid.xml as "Amiga Disk image File (generic)" (see appended
output/trid-v-old.txt)
So i run tridscan on these samples and i get a trid definition file
msg-netware-dos.trid.xml.
I delete obviously garbage patterns (short null patterns). Such
message files start with characteristic ASCII text phrase. That is
expressed by patter block:
<Bytes>444F5320436C69656E74204D6573736167652046696C653A20</Bytes>
<ASCII> D O S C l i e n t M e s s a g e F i l e :</ASCII>
<Pos>0</Pos>
At offset 25 often the file name like IPXODI.COM, DOSRqstr, TASKID is
stored. So i mention this in the remark line.
Afterwards comes a string like V1.20, v1.00 or 0. I assume that this
is the version of the DOS executable or Netware virtual loadable
module. After comma comes phrase " Tran ". That is followed by a
string like v1.00 or 0. I assume that is the version of the
translations in the message file.
Some bytes later apparently a padding with dozen null bytes occur til
offset 100. That is terminated by Control-Z character followed by
hexadecimal 1. That is expressed by XLM construct like:
<Pattern>
<Bytes>00000000...001A0100</Bytes>
<Pos>52</Pos>
</Pattern>
A few information about this file format can be found in Matthias
Paul's German tips about Novell DOS. This is now expressed by
reference URL line like:
<RefURL>
https://en.wikipedia.org/wiki/Personal_NetWare</RefURL>
With the new definition the undetected Novell message files are now
described ( see appended output/trid-new-v.txt). TrID definitions,
some examples and output are stored in archive dos-novell.zip. I hope
that my XML file can be used in future version of triddefs.
The inspected MSG samples are misidentified as "Amiga Disk image File
(generic)" because adf-gen.trid.xml just contains a pattern like:
<Bytes>444F53</Bytes>
<ASCII> D O S</ASCII>
<Pos>0</Pos>
Unfortunately this expression is too general, because it also match all
Texts starting with word DOS. So i think this definition should be
removed. The real Amiga Disk image Files *.adf are still recognized by
one of the eight definitions img-adf-*.trid.xml. According to web site
reposcope.com instead mime type application/octet-stream the correct
should be application/x-amiga-disk-format
With best wishes
Jörg Jenderek
