AUXILIARY SCHEDULE 4
(1)
TIME
it
A/Z. The concepts in
This schedule is an auxiliary to the enumerated classes 2/9,
are not to be used
classmarks
their
and
classes
those
qualify
to
only
are available
on
(2)
: PERIODS OF
their
own.
other arrangement is explicitly provided, these
historical period, introduced by '7' from
concepts
treatment). For example, Mathematics is
Historical
or
Time
(representing
1
Schedule
be AM7 NP (using Schedule 4A) or AM7 L
would
century
19th
the
in
Mathematics
and
AM
alternatives are
(using Schedule 4B) or AM7 HAN (using Schedule 4C). The three instructed;
e.g.at POW
may be used wherever
explained below in Note 4. Similarly
appears:'A§d to
(Post-Reformation period of the Christian Church) the instructionthe 19th century
the Christian Church in
POW letters A/Y from Schedule 4' and so
is followed.
would be POW NP or POW L or POW HAW according to which alternative
In
of the BC,
may be used to
any class
unless
qualify
some
it
by
it
(3)
(4)
(4.1)
(4.2)
commencing
— a
Specification of an historical period always involves two parameters
works
date and a duration (although in the one case of partially comprehensive a terminal
dealing with a subject ‘from earliest times to-—-' this is more strictly
states or territories
date and a duration). In the case of both histories of political
combination
and of particular subjects the literature appears in every conceivable
of a
of date and duration with endless overlapping of periods. The maintenance
demanding
completely accurate and predictable sequence of periods imposes extremelylibrarians
conditions on notation and for many collections or parts of collections
in order to enjoy
and bibliographers are willing to make some sacrifice of precision
a briefer notation and a minimum (or total absence) of synthesis.
this reason, three alternative schedules are provided below:
For
the standard
Schedule 4A is the alternative recommended and may'be regarded as
provides a reasonably precise arrangement, adequate for
schedule for Periods.
It
a single
quite large collections. Although it involves synthesis (the adding of
letter standing for a duration to letters standing for a commencing date) this is
of the very simplest kind.‘
slightly shorter
Schedule 4B is a simpler schedule, entirely enumerative and with
It
(4.3)
it
it
produces
is not as precise in the arrangement
classmarks in most cases. But
is based on Schedule 4 of BCl.
as Schedule 4A.
Schedule 4C is the most detailed schedule, designed to provide an extremely
accurate and consistent sequence covering the whole range of recorded history. or
decade
Whereas Schedule 4A provides a commencing date accurate to the nearest
commencing date
five years for periods since 1000 A.D. Schedule 4C can specify any basically
of a
consists
and any duration to the exact year. As in Schedule 4A
of durations, with rules for adding the
list of comencing dates and a
latter to the former.
is a slightly
As is to be expected, the price paid for this greater precision
slightly more demanding rules for synthesis. For example.
longer notation and
the enormous span of individual years to be specified makes the listing of every
by simple
one quite prohibitive; consequently, individual years are specified
list
it
synthetic addition.
/
(5.3)
I
basic principles underlying the arrangement provided are:
later);
Chronological order (earlier periods file before
General before special — a period which completely includes another one files
before it. For example, the period 1800 - 1950 files before 1800 - 1940, or 1800
in that year
1900; an individual year (1914, say) files after any period beginning
(e.g. 1914 - 1918).
Filing is by earliest date of period, not latest.
(6)
All
(5)
(5.1)
(5.2)
The
three schedules consist of letters only and filing is normal A/Z throughout,
both for periods A.D. and B.C. The 'backward' filing necessitated by numeral
systems, in which large numbers (representing lengthy periods, or earlier dates
B.C.) file before smaller numbers (representing shorter periods, or later dates
B.C.) is avoided by assigning the notation on the basis of reciprocals.
-189-
A
Bibliographic Classification
AUXILIARY SCHEDULE 4A
: PERIODS OF TIME
(1)
This is an alternative to Schedules
(2)
Apart from the enumerated periods at
(2.1)
a
(2.2)
a
list
list
it
C/DE
a
Any
(4)
Where the
comencing date
enumerated date
—
e.g.
if
CE
CG
CJ
period) - Table
2
between two enumerated commencing dates, use the
the commencind date is 1848, use 1845 (PL)
earliest
duration falls between 2 enumerated durations, take the next largest - e.g.for a
duration of 11 years use 20 years; so the period 1848-1859 would be coded as PLX (1845-1865)
Where the
To 2000 A.D.
CL
1940
1900
1800
CM
CN
CP
CQ
DA
DAG
4
1
falls
Periods from the earliest times
* For works which include prehistoric times
CC
at beginning of Schedule
consists of
of approximate commencing dates - Table
of durations(numbers of years in
see notes 3/6
given period is obtained by adding a single letter from Table 2 directly to a comencing
date from Table 1; e.g. to code 1800-1900 the commencing date code for 1800 is taken (N)
and the duration code for 100 years (P) is added directly,to give NP. Every classmark must
contain both these components
(3)
(5)
4B and 4C;
(STANDARD SCHEDULE)
Prehistory (from earliest times to
Geological eras
'
»
as
well
as
historic (recorded)
To 1700 A.D.
1600
1500
1000
500
CR
CT
CV
time
To
000
500
1000
(4000
A.D.
B.C.
B.C.
B.C.)
sis
DA
B.C.)
4000
(Cultural epochs)
* There is no agreement on the commencing dates of the following, or their duration; both
vary widely according to place and context. They are given here on the grounds of literary
warrant-
DAP
DAR
DB
DC
DD
DE
Palaeolithic
Mesolithic
Neolithic
Ancient, medieval and odern history
Ancient and medieval history
Ancient history (c. 4000 B.C.- 500 A.D.)
Table
1
(Schedule 4A)
:
Comencing dates of periods
* These codes cannot be used on their own;
* See notes 2/5 for rules
they must be followed by
a
letter
from Table
2
(Duration)
7
Periods beginning in
DF
DG
DH
DJ
DK
DL
DM
DN
D0
DP
DQ
4000 B.C.
3900
3800
3700
3600
3500
3400
3300
3200
3100
3000
Periods beginning in
EB
EC
ED
EE
EF
EG
EH
EJ
EK
EL
ET
900
800
700
600
500
400
300
200
EU
100
EV
O00
EM
DR
DS
DT
..
t
DU
DV
DW
DX
DY
DZ
EA
2900
2800
2700
2600
2500
2400
2300
2200
2100
2000
1900 'B.C.
1800
1 700
1600
1500
1400
1300
1200
1100
1000
EN
E0
EP
EQ
ER
ES
EW
FA
200
300
400
450
FB
Medieval period
EX
EY
EZ
* There is no agreement
on the exact dates or
duration of this* For periods from and
including Medieval
period, add to FA e.g. Medieval era to
present day,
FC
FD
FE
FF
FG
FH
FJ
-190-
Periods beginning in
100 A.D.
A.D.
FK
"
500
600
700
800
900
1000
1020
1040
FAK
Auxiliary
Schedule 4A
Periods beginning in
:
Periods of time (Standard schedule)
Periods beginning in
1060 A.D.
1080
1100
1120
1140
1160
1130
1200
1220
1240
1260
1280
1300
1320
1340
HS
HT
HV
HW
HX
J
KF
-KG
KH
KJ
or duration of this.
* For periods from and
including the Renaissance, add to FZ e.g. Renaissance to
1750, FZL
1350
1360
1370
1380
1390
1400
1410
1420
1430
1440
1450
1460
1470
1480
1490
1500
1505
1510
1515
1520
1525
1530
1535
1540
1545
1550
1555
1560
1565
KK
KL
KM
KN
KP
KQ
KR
KS
KT
KV
KW
KX
1800 A . D
1805
1810
1815
1820
1825
1830
1835
1840
1845
1850
1855
1860
1865
1870
1875
1330
1885
1890
1895
N
PC
PD
PE
PF
PG
PH
1600
1605
1610
1615
1620
1625
1630
1635
1640
1645
1650
1655
1660
1665
1670
1675
1680
1685
1690
1695
KC
KD
KE
Renaissance
* There is no agreement
on the exact dates
Periods beginning in
1570 A.D.
1575
1580
1585
1590
1595
HR
PJ
PK
PL
PM
PN
PP
PQ
PR
'
P5
PT
PV
PW
PX
1900
1905
1910
1914
1914-18
* For periods from
and
_
1700
1705
1710
1715
1720
1725
1730
1735
1740
1745
1750
1755
1760
1765
1770
1775
1780
1785
1789
MF
MG
MM
MJ
MK
* For periods from
‘
and
RKX
1940
1945
1950
1955
1960
1965
1970
1975
1980
1985
1990
1995
2000
RM
RN
R0
RP
RQ
RR
RS
RT
RV
including
MS
RW
.
- e.g.
1789-1848,
RY
RZ
MST
S
Table
* These codes cannot
*
2
from Table 1
notes 2/5 above
See
(Schedule 4A)
be used on
their
Duration (number of years in
own;
they must be added to
a
period)
specific
Duration in zears
200
2500
2000
1500
1000
800
700
500
400
a
for rules
Over 4000 years
4000
3000
.8»
:
-191-
including
1939/1945, add to
RK - e.g. 1939/1950,
1789-1815 add
to
1935-45
RL
* For periods from
and
RC
1919
1920
1925
1930
1935
1939
1789-1815
,
including
1914/1918,add to
commencing date taken
A
(1)
(2)
(3)
(4)
Bibliographic Classification
Auxiliary Schedule 4B : Periods of Time (for broad classification)
This is an alternative to Schedules 4A and 4C; see note at the beginning of Schedule 4.
It is a fully enumerated schedule, consistent with Schedule 4 in BC1, but much fuller in its detail
All periods file by initial date, then duration. A period which completely includes another one
files before
in the earliest preceding
a period overlaps two or more of the enumerated periods, class
- e.g. 1715-1789 is classed as 1700-1800.
period which completely includes
it.
If
it
it
earliest
Periods from the
times
ABK
ABL
ABM
ABN
ABP
ABQ
B0
BP
BQ
BR
BS
BT
BU
BV
BW
BX
(4000 BC) see ABR
Prehistory (from earliest times to
ABR
ABS
(Cultural epochs)
Palaeolithic
Mesolithic
Neolithic
AF
AJ
AL
AM
AN
A0
AP
(Periods
-
AD)
000 - 2000 AD
000 - 1500
000 - 1000
O00 - 00
5
000 - 100
AQ
AR
AS
AT
AU
10°
AV
AW
AX
200
300
'- 20°
300
400
B
exact
iw
TP
nearest approximation.
$3
A
-
45°
'
1200
'-
BF
BC
BH
800
soo
1930
191856 Zgigeo
1960 - 1970
1970 - 1980
1975 — zooo
1980 - 1990
TV
TW
TX
TY
V
-192-
‘1940193°
192345 505350
TU
1450
1100
-
192238 203345
1945
1960
ii
1°00
450
soo
450 - 500
500
600
700
600
700
800
BE
192°
ST
SV
dates or duration of the Mediaeval
period but this is probably the
450
BB
1918 - 1945
1918 - 1939
2%
400 - 500
450 - 2000
.
.
450 - 1450 Mediaeval period
* There is no agreement on the
AX
AZ
BK
KT
KV
-
500 BC - 000 AD
500 - 400 BC
400 - 300 BC
300 - 200 BC
200 - 100 BC
100 BC - 000 AD
AK
BJ
-
-
AI
Bn
CV
CX
CY
E
-
AG
AH
BC
191s1g1iodo1918
CS
To 000 A.D.
3000 BC
000 AD
2000 BC
3000
2000 BC - 000 AD
1000 BC
2000
1000 BC
000 AD
AE
1»
gw
CP
Ancient, mediaeval and modern history
Ancient and mediaeval
Ancient history (recorded history,
c.4000 BC to 500 AD)
AC
ACQ
AD
I
RT
C
literary warrant.
matter of
1350 - 1400
1400 - 1500
1450 - 2000
1450 - 1900
1450 - 1750
1450 - 1650
1450 - 1500
1500 - 1800
1500 - 1600
'
1550 - 1600
1600 - 1800
1600 - 1700
1600 - 1650
1650 - 1750
1650 - 1700
1700 - 1800
1700 - 1775
1750 - 1800
1775 - 2000
1775 - 1850
1789 - 1815
1800 - 1900
1815 - 2000
1815
1900
1815 - 1830
1830 - 1900
1850 - 1875
1875 - 1900
1900 - 2000
1900 - 1975
1900 - 1945
1900 - 1914
BY
BZ
is
no agreement on the
commencing dates of the following,
or on their duration; both vary
widely according to place and
context. They are given here as a
* There
Renaissance (c.1350 - 1550)
* There is no agreement on the exact dates
or duration of this period, but this is
probably the most satisfactory position
4000 BC)
Geological eras
ABV
ABX
ABY
-
BM
BN
1700
1600
1500
1000
500
000
500 BC
1000 BC
ABJ
800 - 1000
800
900
900 - 1100
900 - 1000
1000 - 1450
1000 - 1300
1000 - 1100
1100 - 1200
1200 - 1450
1200 - 1300
1300 - 1450
1300 - 1400
BL
T0 2000 AD
1940
1900
1800
ABD
ABE
ABF
ABC
ABH
2000
-
2100
199°
' 2°°°
SCHEDULE 4Q
* This is
an
(1)
The
alternative to
:
Periods of Time (for close
Schedules 4A and 4B.
See
notes 3/6 at beginning of Schedule
classmark for any period from 4000 B.C.or
consists of
(1.1)
(1.2)
(1.3)
The code
The
for the
commencing date
classification)
later
and
lasting
for the
number
4
single year
of the period (from Table 1), followed by
letter 'A' (the indicator for period), followed
The code
more than a
by
of years in the period (from Table 2)
e.g. to code the period 1800-1950, the code for 1800 A.D. is taken from Table 1 i.e. H; 'A' is added - i.e. HA; the code for the number of years duration is taken
from Table 2 - i.e. VT for 150 years. This gives the full classmark HAV T.
(2)
Every period exceeding one year must contain the
(3)
Classmarks for single years must be built according to the instructions in the two tables
The dates in Table
(apart from the enumerated periods at C/DE) cannot be used on
their own - they are purely for purposes of period classmark building. For
example,
H 1800 has 'A' added to
to introduce a period as shown above; 'B' added to any commencing date denotes the single year itself - so HB is the single year 1800 A.D. (which, of
3
elements above in
its
classmark
l
it
course, files after any period
within that period).
C
To 1980 A.D.
1960
CP
1940
1920
1900
1800
CQ
CR
Cs
CVE
DAP
DAR
DB
DC
DD
DE
4%
in that year, since
it
is completely contained
TABLE l (Schedule 4C) : Commencing dates of periods
* Except for classes C/DE these codes cannot be used on their own.
Periods from the earliest times
* For works including both pre-history and historic (recorded) periods
* The following are likely to suffice for most libraries. For libraries wishing
to specify to the exact year, an expansion of this is provided in Table 3.
co
DA
DAG
commencing
To 1700 A.D.
CVK
Cvp
1600
1500
1000
500
000
QVV
Cwy
cxp;
CXL
Prehistory (from earliest times to
Geological eras
To
CXQ
Cxw
CYJ
CYT
500 B.C.
1000
2000
3000
(4000 B.C.) §_e£ DA
Prehistory
4000 B.C.)
(Cultural epochs)
* There is no agreement on the commencing dates of the following, or on their
duration; both vary widely according to place and context. They are given here
as a matter of convenience
Palaeolithic
Mesolithic
Neolithic
Ancient, medieval and modern history
* This period could be synthesised by adding to DF. This provides it with a briefer
class mark. The same applies to DD and DE
Ancient and medieval history
Ancient history (c. 4000 B.C.- 500 A.D.)
Periods beginning in any year between 4000 B.C. and 001 B.C. (classes DF/EUYU)
* To code any individual year between 4000 B.C. and 001 B.C., add to the code
first year of the century the letters C/YU following DF in DFC/DFYU below. for the
Note that the first year of the century is always the next highest number,
in two zeros, than the individual year sought; e.g. to code 2763 B.C., addending
to the
code for 2800 B.C. - i.e. DS; in the sequence DFC/DFYU the code
for 63 i§_VS, so
the classmark for 2763 is DSVS.
* The letter 'B' added to any date represents the single year itself - e.g. DFB is the
year 4000 B.C. itself.
Periods beginning in
Periods beginning in
Periods beginning in
DF
DFC
4000 B.C.
3999
DFI
J
3993 BJC.
92
-193-
DFP
3986 B.C.
DFV
A
C
Bibliographic Classification
Periods
beginning
Periods
beginning
in
vp
78
77
76
75
74
73
72
71
70
V“
69
VF
VG
vu
v1
VJ
vx
vu
v0
vP
V0
3.0.
3979
DFVC
VD
VE
.
0Fxc
32
31
30
DP
XL
DR
X“
29
ns
2800
DT
XP
27
26
gs
2700
Z288
0w
2400
0X
2300
2200
2100
xu
"34
x1
xJ_
33
nu
00
xn
x0
61
xu
ws
wc
wn
60
YB
YC
YD
YE
YF
we
wu
w1
wJ
WK
WL
wn
wu
wo
wr
wQ
wn
ws
ww
wn
XB
28
25
24
23
22
21
20
X0
xa
xs
XT
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
DJ
XG
xx
59
nu
nx
XF
68
67
66
8.0.
37
36
35
xx
vu
wF
3939
38
in
3800
3700
3600
3500
3400
3300
3200
3100
3000
2900
XD
vr
WE
Periods
beginning
in
65
64
63
62
VR
vs
EVX J
19
18
17
DL
DM
00
DY
nz
EA
EB
EC
ED
EE
YG
16
15
EF
YH
14
80
YI
13
EH
YJ
12
11
10
EJ
YK
YL
YM
YN
Y0
YP
YQ
YR
YS
YT
YU
DG
09
08
07
06
05
04
03
02
01
3900
EK
EL
EM
g
EP
EQ
8.0.
2000
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
ggg
6
5
OO
OO
g
233
ET
2
EU
EUYU
O01
00
100
Periods beginning in any year between 000 A;D.and 999 A.D.(C1asses EV/FGYU)
* To code any individual year between 000 A.D.and 999 A.D., add to the
first year of the century the letters C/YU following EV in___
EVC/EVY U below;
e.g. 453 A.D. = EZW O
Periods
Periods
Periods
beginning
beginning
beginning
in
EV
EVC
O00
1
A.D.
in
23 A.D.
24
EVVE
VF
040»,
-194-
in
EVWH
WI
46 A.D.
47
Auxiliary
EVX K
Schedule
iii.
Periods
beginning
69
7o
XM
71
YI
XN
72
73
74
YK
YL
XP
XQ
xs
75
76
77
XT
7s
XR
xu
79
YB
so
YC
YD
YE
81
82
YF
83
84
Periods of time (for close classification)
L
Pefi0§$
begfnnlng
1“
in
EVXK
XL
xo
:
Periods
beginning
in
A.D.
4C
EVYG
YH
YJ
YM
EX
EY
EZ
90
YN
Y0
93
YP
YQ
94
95
96
97
98
99
1 00
200 A.D3 00
400
Medieva1.period
* There is no agreement on the exact
dates or the duration
of this, but
is
given here for
convenience
F
89
91
92
YR
YS
YT
YU
EW
85 A.D.
86
87
as
it
FC
FD
FE
FF
FG
FGYU
500
600
7 00
800
9 00
999
Periods beginning in any year between 1000 A.D. and the
present
* To code any individual year between 1000 A.D. and the present day (Classes FH/Y)
day, add to
the first year of the 20-year period within which
falls
letters C/U
following FH in FHC/FHU below; e.g. 1066 A.D. = FLH; 1975 the
= RQ
it
Periods
beginning
Periods
beginning
ln
FH
FHC
D
1000 A.D.
1001
02
03
04
05
06
07
08
09
10
11
12
13
FQ
FR
FS
FT
FU
FV
FW
FX
FY
FZ
G
FK
FL
1160 A.D.
GP
1200
GQ
GU
1300
80
GV
1700
20
20
40
Renaissance period
* There is no agreement on the exact
dates or duration
GD
1360
19
GF
1020
40
1400
CG
20
40
GJ
convenience
GH
60
80
GK
1100
F0
GL
20
GM
FP
40
GN
1560 A.D.
80
1600
20
40
60
20
40
60
80
15
16
17
FM
FN
G0
80
of this, but it is
given here for
14
FJ
Periods
beginning
1H
60
80
1500
20
40
-=‘».
-195-
GR
GS
GT
GW
GX
GY
40
60
80
1800
20
40
60
80
1900
20
40
60
80
2000
20
40
60
80
2100
A
TABLE 2
(schedqlg 4c)
Bibliographic Classification
:
Duration (number of years in
a
period)
they must be added to
a
specific
* These codes cannot be used on their own;
commencing date taken
from Table 1.
particular period:
Select the commencing date code from Table 1
Add 'A' (the indicator for Period)
Add the duration code below
e.g., to code the period 1660-1740: (1) select the commencing date code (1660 A.D. is GT);
(2) add 'A' to give GTA; (3) add the code for 80 years (8 decades) to GTA to give GTA WQ,
* For drations not listed below (i.e. ones not ending in a zero) follow the rules preceding classes
*
To code a
(1)
(2)
(3)
D, GH and JC.
CY
Durations longer than 10,000 years
(Durations between 6400 and 10000 years —Classes EC/FS)
* Within these periods,to code more exactly than is allowed for below is very rarely
necessary. If the need arises, see Table 4.
EC
EH
EN
10000 years
9500
9000
ET
FB
FG
8500 years
8000
7500
FM
FR
FS
7000 years
6500
6400
(Durations between 2300 and 6300 years - Classes GH/JB)
* Within these periods, to code more exactly than is allowed for below is rarely
necessary. If the need arises, see Table 5.
GH
GJ
GK
GL
GM
GN
GP
GQ
GR
GS
GT
GV
GW
GX
6300 years
6200
6100
6000
5900
5800
5700
5600
5500
5400
5300
5200
5100
5000
GY
GZ
HA
HB
HC
HD
HE
HF
HG
HH
4900 years
4800
4700
4600
4500
4400
4300
4200
4100
4000
HN
HP
HQ
HR
HS
HT
HV
Hw
HX
HY
HJ
HK
HL
HM
3900
3800
3700
3600
HZ
JA
Jc
3500 years
3400
3300
3200
3100
3000
2900
2800
2700
2600
2500
2400
2300
(Durations between 1 and 2300 — Classes JC/YX)
* The codes below represent duration in exact decades; e.g. Y = one decade (10 years);
SC = 70 decades (700 years)
* To code a duration not listed below (i.e. one not ending in a zero):
(1) Select the code representing the next largest decade number; e.g. to code a
duration of 37 years select the code for 4 decades (40 years)
(2) Add the code for the number of individual years within a decade (e.g. for 37 years
add the code for '7'). These codes are the letters P/X following Y in YP/YX,
e.g. the code for 37 is WUR.
(3) An example of a specific period would be NAW UP for 1900/1939, (N from Table 1,
WUP from Table 2).
JC
JD
JE
JF
JG
JH
JJ
JK
JL
JM
JN
“k
JP
JQ
JR
JS
JT
JV
JW
2300 years
2290
2280
2270
2260
2250
2240
2230
2220
2210
2200
JX
JY
2190
2180
2170
2160
2150
2140
2130
KM
KN
KC
KJ
KK
KL
KP
KQ
KR
KS
2120 years
2110
2100
2090
2080
2070
2060
2050
2040
2030
2020
2010
2000
1990
1980
1970
1960
-196-
KT
xv
KW
KX
KY
LC
1950 years
1940
1930
1920
1910
1900
LN
1890
1880
1870
1860
1850
1840
1830
1820
1810
1800
LP
1790
LD
LE
LF
LG
LH
LJLK
LL
LM
<
Auxiliary
1-Q
LQ
LR
US
LT
LV
LW
LX
LY
MC
MD
ME
MF
MG
MH
MJ
MK
ML
MM
MN
1780 years
1770
1760
1750
1740
1730
1720
1710
1700
1690
1680
1670
1660
1650
1640
1630
1620
1610
1600
Schedule
PS
PT
PV
PW
PX
PY
QC
QD
QE
QF
QG
QH
QJ
QK
QL
(M
QN
4C
Periods of time
:
1160 years
1150
1140
1130
1120
1110
1100
1090
1080
1070
1060
1050
1040
1030
1020
1010
1000
990
98O
970
960
950
940
930
920
910
900
QP
QQ
MP
MQ
MR
MS
MT
MV
MW
MX
MY
NC
ND
NE
NF
NG
NH
NJ
NK
NL
NM
NN
1590
1580
1570
1560
1550
1540
1530
1520
1510
1500
1490
1480
1470
1460
1450
1440
1430
1420
1410
1400
QR
QS
QT
QV
QW
QX
QY
RC
890
880
870
860
850
840
830
820
810
800
RP
RQ
NP
NQ
NR
NS
NT
NV
NW
NX
NY
PC
1390
1380
1370
1360
1350
1340
1330
1320
1310
1300
PN
1290
1280
1270
1260
1250
1240
1230
1220
1210
1200
PP
PQ
PR
1190
1180
1170
PD
PE
PF
PG
PH
PJ
PK
PL
PM
RR
RS
RT
RV
RW
RX
RY
SC
SF
s0
sn
SJ
sx
SL
SM
su
SP
SR
ss
ST
690
680
670
660
650
640
630
620
610
600
590
580
570
560
550
-197-
540 years
530
520
510
500
SV
SW
SX
SY
TC
490
480
470
46 0
450
440
430
420
410
400
TD
TE
TF
TG
TH
TJ
TK
TL
TM
TN
‘
TP
TQ
TR
TS
390
380
370
36 0
350
340
330
320
310
300
TT
TV
TW
TX
TY
VC
VD
VE
290
280
270
260
250
240
230
220
210
200
VF
VG
VH
VJ
VK
VL
VM
VN
VP
VQ
VR
VS
VT
VV
VW
VX
VY
W
WP
WQ
SD
SE
sq
~~
790
78 0
770
760
750
740
730
720
710
700
(for close classification)
WR
WS
WT
wu
wv
x
Y
YP
YQ
R
.
190
180
170
16 0
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
9
8
A
TABLE 3
Bibliographic Classification
(Schedule 4(D
:
Periods from the earliest times (Class
C)
* These periods apply only to the very beginning of the Period facet (before Prehistory)
* This table consists of the same dates as Table 1 but in reverse order, since what is now
required is a set of terminal dates, not commencing dates
* This table is an amplification of the dates enumerated in Table 1 and provides for greater
precision
From the
earliest times
To 2100 A_D,
CH
00
0P
CQ
CR
cs
CT
cvg
CVC
CVD
CVE
CVF
CVG
cvu
CVJ
CVK
CVL
CVM
(Schedule 4C)
TABLE 4
To 1640 A.D.
CVN
CVO
CVP
CVV
2000
1930
1950
1940
1920
1900
1330
1860
1340
1820
1800
1780
1760
1740
1720
1700
1680
1660
CN
CXK
CXL
cwn
CWE
Renaissance
CWH
1300
1200
1100
1000
900
800
700
600
500
CXP
CXQ
CXR
CVX
CWN
CW8
CWY
CWZ
CXB
CXC
CXD
CXE
To
CXM
CXN
cxo
CXS
CXT
CXV
CXW
CYD
CYJ
CYO
CXF
Medieval period
CXG
400
300
cx1~1
:
CXJ
1620
1600
1500
1460
1400
CYT
CYZ
,
200 A,D
100
000
100 B.C.
200
300
400
500
600
700
800
900
1000
1500
2000
2500
3000
3500
(4000)
32
Durations between 6,400 and 10,000 years (Classes EC/FS in Table 2)
* This table allows more precise specification (to the nearest century) of durations between
6,400 and 10,000 years in Table 2.
10000 years
9900
9800
9700
9600
9500
9400
9300
9200
9100
9000
EC
ED
EE
EF
EG
EH
EJ
EK
EL
EM
EN
8900
EP
8800 years
8700
8600
8500
8400
8300
8200
8100
8000
EQ
ER
ES
ET
EV
EW
EX
EY
FB
FE
specify
a
FG
FH
VFJ
FK
FL
FM
FN
F0
FP
FQ
7900
7800
7700
7600
FD
FE
FF
To
DA
duration to the nearest year
:
proceed as
FR
FS
in Table
7500 years
7400
7300
7200
7100
7000
6900
6800
6700
6600
6500
6400
5
(1) Select the code above for the next hi her 100 years period; e.g. to code 6460 years,
select the code for 6500 years ZFR).
(2) Proceed as in Table 5 (Rule 2); e.g. for 6460 years add the code for 60 in Table 5 (RP)
to the code obtained from (1) above - to give FRR P
>-\
-198-
Auxiliary
TABLE 5
(Schedule 4C)
:
Schedule
4C
:
Periods of time (for close
classification)
Durations within centuries between 2300 and 6300 years (Classes
GH/JB)
* This allows more precise specification (to the individual
year)of durations between 2300 and
6300 years in Table 2 (and of durations between
6400 and 10000 years in Table 4)
To code a
specific duration
(1)
Select the code from Table 2 for the next higher 100 year period;
years select the code for 2500 years (HZ)
(2)
Add the code from
e.g. to code 2430
this Table 5 for the number represented by the last two numerals of
the
e.g. for 2430 add the code for 30 (TV); added to the code for
2500
this giires the code HZT V for a duration of 2430 years
duration concerned;
years (HZ)
PA
PB
PC
PD
PE
PF
PG
PH
99
years
RJ
98
RK
97
96
95
RL
RN
94
93
R0
RP
RM
PJ
92
91
RQ
PK
90
RR
PL
89
88
87
86
85
84
83
82
81
80
RT
RV
PM
PN
P0
PP
PQ
PR
PS
PT
PV
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
RS
RW
RX
RY
RZ
S
TA
TB
TC
TD
49
48
47
Pw
79
PX
78
77
76
75
TG
TH
46
45
44
43
42
69
T0
36
PY
PZ
RF’
TE
TF
-s
-199-
years
TR
TS
TT
33
32
31
Tv
30
TW
29
28
27
26
25
24
23
22
21
20
TX
TY
TZ
V
WA
WB
WC
WD
WE
WF
19
WC
18
WH
17
16
15
14
13
12
11
10
WJ
WK
WL
WM
wN
wo
wp
wx
years