Re: arsclist Raw Marc Record, Orecords.mrc

[<stevenc@xxxxxxxxxxxxxx>]

Saw all this in Infoview (an old shareware program which also allows
byte editing to an extent). Since it uses all the separators, and has an
odd record length (and no blanks) I assume it uses "packed" storage
rather than fixed-length (random access) fields (MS Access does this
somehow, but without separators that I can see).
What I'm still curious about is the 264 (I think) numeric bytes that
open the record...what do they do?
...stevenc
----- Original Message -----
From: "Premise Checker" <checker@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "ARSC List" <ARSCLIST@xxxxxxxxxxxxxxxx>
Sent: Sunday, December 15, 2002 1:37 PM
Subject: arsclist Raw Marc Record, Orecords.mrc


> Frank Forman here:
>
> Ralph,
> many thanks for sending this, and here's feeding it back for those who
> can't open it. Each character is a byte, or eight 0s and 1s. Good old
> DOS-Shell lets me look at each one, represented as two hexademical
> numbers. A hexadecimal number ranges from 0 to 9 and then A to F, or
> sixteen characters, instead of ten decimal characters. The very first
> character in the file is 30 in hexadecimal (48 in decimal) and is the
> ASCII character for 0. You will see this zero below. The second is hd 31
> or 1 in ASCII, and so on. The n you see is hd 6E (decimal 110). The spaces
> between m and 2 are hd 20.
>
> On the 7th line (which begins 000.0), you may or may not see a question
> mark after N/A<space>><space>. It is really hd 1E (decimal 30) and is a
> non-typewriter key that means record separator. (Whether it shows up as a
> question mark depends on the software you are using that converts a Byte
> to a character on your screen.) There are lots of these record separators
> in the MARC record.
>
> What I can't seem to be able to do is show that the ? also represents
> hexademical 1F, which is for unit separator, though I can see it clearly
> in DOS-Shell. So let me just say what the last several characters are:
>
> 874-1951<period><unit separator>4cnd<record separator>2
> <space><unit separator>aBoston<space>Sympho
> ny<space>Orchestra<period><unitseparator>4p
> rf<record separator><group separator>
>
> The group separator is hd 1D and, I suspect, allows the next recording to
> follow immediately.
>
> I do not understand all the characters that precede the information and
> what they accomplish, but it seems clear that unit, record, and group
> separators delimit fields, which are set up in advance. I don't know what
> happens when a field is blank. Someone who has actually made a MARC record
> can clue us in.
>
> I don't know whether MARC is a format everyone on the Planet must use or
> whether it is a program that you can fit in fields to suit yourself (which
> raises compatibility programs). So I don't know what happens when you want
> to add matrices, recording dates, and so on, which of course discographers
> want to do.
>
> Anyhow, here's what your MARC record looks like under the hood.
>
> 01140njm 22003614a
> 45000010012000000030006000120050017000180070015001290080041000350100017000
> 76035002300093040001300116028001900144028001700163028001700180028001700197
> 02800170021402800170023104200080024805000200025610000340027624501020031024
> 60027004122600037004393000046004764400031005225110062005535000023006155000
> 04100638650002100679700004200700710003600742>ocm49737131>OCoLC>20021214000
> 000.0>020405s1935 njuspn i N/A > ?a 02567649 > ?a(OCoLC)ocm49737131>
> ?aDLC?cDLC>sd|dmsennmslub>02?aAM
> 257?bVictor>00?a8624?bVictor>00?a8625?bVictor>00?a8626?bVictor>00?a8627?bV
> ictor>00?a8628?bVictor> ?apcc>00?aRDA 09833_09837>1 ?aStrauss,
> Richard,?d1864_1949.>10?aAlso sprach Zarathustra?h[sound recording]
> =?bThus spake Zarathustra : op. 30 /?cRichard Strauss.>31?aThus spake
> Zarathustra> ?aCamden, N.J. :?bVictor,?c[1935?]> ?a5 sound discs
> :?banalog, 78 rpm ;?c12 in.> 0?aMusical masterpiece series>0 ?aBoston
> Symphony Orchestra; Serge Koussevitzky, conductor.> ?a"Red seal record.">
> ?aProgram notes inserted in container.> 0?aSymphonic poems.>1
> ?aKoussevitzky, Serge,?d1874_1951.?4cnd>2 ?aBoston Symphony
> Orchestra.?4prf>:
>
>
>
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