Subfields present

Subfields present

Warning

Analysis is based on a copy of BLL60 dating to March 2023, so may be out of date

For fields that are intentionally present in holdings records, the table below lists the subfield codes defined for each field, along with the actual subfield codes found to be present in BLL60.

^ denotes a blank character being used as a subfield code. Spaces within lists of characters are to aid readability.

Table of fields and subfields (click to expand)

Field tag	Obsolete?	Permitted subfields	Subfields present	Illegal subfields
541		3568 abcdefhno	235 abcdef	2
561		3568 au	356 ab	b
562		3568 abcde	3568 abcdez	z
563		3568 au	35 a
583		23568 abcdefhijklnouxz	25 acfhkxz
589	obsolete	a	atu	tu
590		a	a
843		35678 abcdefmn	35 abcdefn
845		23568 abcdfgqu	25 afu
852		23689 abcdefghijklmnpqstuxz	23689 abcfghijklmnopqstxz	o
853		23689 abcdefghijklmnoptuvwxyz	389 abcgijkuvwxy
854		2368 abcdefghijklmnoptuvwxyz	39 abijuvw	9
856		23678 acdfghlmnopqrstuvwxyz	3 auxy
863		68 abcdefghijklmnopqstvwxz	abijpqx
866		268 axz	$8 axz	$
903		a	a
957		a	acg	cg
958		abc	8abc	8
972		25 afijklmu	25 afijkmu
980		[Cannot find documentation]	aeq
985		a	35 abcdjq	35 bcdjq
AQN		a	atux	tux
CAT		abchl	abchl
CCS		e	e
CNC	obsolete	a	atu	tu
CTR		ab	abtu	tu
LKR		abl	$abl	$
SMK		2368 abcdefghijklmnpqstuxz	3 abchijkq
SMS	obsolete	a	[Field not used]
STA		ab	ab

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Illegal subfield codes

The table below lists all illegal subfield codes found in BLL60, along with:

• The number of records in which the subfield code is found
• The total number of instances of the subfield code

Only valid fields are considered. Subfield codes present within fields with invalid field tags are not listed.

The table below suggests that the following subfields have been locally defined, but not documented:

• 589 $t, $u
• 852 $o
• 958 $8
• AQN $t, $u
• CNC $t, $u
• CTR $t, $u

        Subfield pairs $t, $u are normally of the form $tDSS0?$u001, where the ? can be 1, 2, 3 or 4.
        958 contains the system number present in the 001, so could be deleted from records without loss of data.
        825 $o seems to be present in MUSIC shelfmarks only, and contains a single capital letter.

Table of subfield codes (click to expand)

Field	Subfield	Number of records	Number of subfields	Notes
541	2	1	1
561	b	1	1
562	z	1	1
589	t	26488	26489
589	u	26498	26499
852	o	384984	384984
854	9	12	12	Only an issue in records 007122420, 009461728, 015600596, 015606468, 016106344, as other fields should be moved to 853. Subfield $9 should probably be defined for field 854.
866	$	1	1
957	c	8	8
957	g	1	1
958	8	251047	251369
985	3	7	9	These are all instances of data being in the wrong field
985	5	16	25	These are all instances of data being in the wrong field
985	b	1	1	These are all instances of data being in the wrong field
985	c	3	3	These are all instances of data being in the wrong field
985	d	1	1	These are all instances of data being in the wrong field
985	j	1	1	These are all instances of data being in the wrong field
985	q	1	1	These are all instances of data being in the wrong field
AQN	t	127247	127249
AQN	u	127515	127517
AQN	x	2	2
CNC	t	322281	322281
CNC	u	322293	322293
CTR	t	491580	491581
CTR	u	491642	491642
LKR	$	2	2

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Valid subfield codes

The table below lists all valid subfield codes found in BLL60, along with:

• The number of records in which the subfield code is found
• The total number of instances of the subfield code

Only subfields present within BLL60 are considered. Subfield codes that are defined but not used are not listed.

Table of subfield codes (click to expand)

Field	Subfield	Number of records	Number of subfields
541	3	113	114
541	5	150	153
541	a	156	158
541	b	9	9
541	c	131	132
541	d	121	122
541	e	7	7
541	f	4	4
546	a	1	1
561	3	300	346
561	5	111721	118419
561	6	3	3
561	a	112152	118881
562	3	642	748
562	5	45705	47308
562	6	1	1
562	8	1	1
562	a	47052	48776
562	b	1859	1878
562	c	43	43
562	d	14	14
562	e	26	26
563	3	18	18
563	5	20572	20612
563	a	20733	20774
583	2	584341	584346
583	5	584342	584347
583	a	584370	584375
583	c	584365	584370
583	f	1	1
583	h	125	125
583	k	584240	584245
583	x	125	125
583	z	1	1
585	5	2	2
585	a	4	4
589	a	30159	30161
590	a	71937	71978
843	3	323	323
843	5	324	324
843	a	595688	595692
843	b	595685	595688
843	c	595684	595687
843	d	595685	595688
843	e	5	5
843	f	329	329
843	n	595684	600910
845	2	824	824
845	5	824	824
845	a	624460	624460
845	f	824	824
845	u	624460	624460
852	2	391754	391754
852	3	229417	229417
852	6	2	2
852	8	81	81
852	9	14	14
852	a	18500690	18501199
852	b	18509762	18509968
852	c	2462388	2462413
852	f	2	2
852	g	4	4
852	h	511635	511635
852	i	1227159	1227179
852	j	17876785	17876978
852	k	510348	510369
852	l	27	27
852	m	183035	183038
852	n	11	11
852	p	93	93
852	q	63040	63043
852	s	9	9
852	t	53	53
852	x	20440	20455
852	z	226438	235824
853	3	52488	52505
853	8	81	152
853	9	52386	52411
853	a	52555	104979
853	b	21604	43184
853	c	18	36
853	g	245	490
853	i	52579	105035
853	j	12621	25107
853	k	1506	3007
853	u	30689	30728
853	v	31462	31500
853	w	52566	52579
853	x	106	106
853	y	4205	4244
854	3	13	13
854	a	13	26
854	b	7	13
854	i	13	26
854	j	3	6
854	u	13	13
854	v	9	9
854	w	13	13
856	3	17	22
856	a	1	1
856	u	571	579
856	x	1	1
856	y	265	265
863	a	21	27
863	b	2	2
863	i	2	2
863	j	2	2
863	p	1	1
863	q	183	276
863	x	1	1
866	8	1	1
866	a	670815	670851
866	x	381801	402157
866	z	720829	814078
903	a	2033948	2033948
957	a	47035	47561
958	a	435081	445172
958	b	284898	285503
958	c	64379	65956
972	2	824	824
972	5	824	824
972	a	624460	624460
972	f	824	824
972	i	93	93
972	j	624861	624861
972	k	1	1
972	m	6	6
972	u	624460	624460
980	a	593502	643526
980	e	1	1
980	q	8	8
985	a	339	377
AQN	a	153448	159273
CAT	a	18515671	48057655
CAT	b	18515671	48057655
CAT	c	18515671	49588262
CAT	h	18515671	49588262
CAT	l	18515671	49588262
CCS	e	824	824
CNC	a	337731	337734
CTR	a	747326	747332
CTR	b	747354	747359
LKR	a	18515667	18515667
LKR	b	18515665	18515665
LKR	l	18515667	18515667
SMK	3	1	1
SMK	a	3848	3848
SMK	b	3848	3848
SMK	c	27	27
SMK	h	6	6
SMK	i	25	25
SMK	j	3836	3836
SMK	k	6	6
SMK	q	1	1
STA	a	90881	91042
STA	b	90881	91042