marc21-describe(1)

NAME

marc21-describe — Creates a frequency table of all subfield codes

The describe command creates a table that lists, for each field, how often a subfield code appears in the input. Since subfields appear only in the data fields, control fields are not included in the output. The columns ind1 and ind2 contain the values of the indicators.

OPTIONS

--tsv: Write output tab-separated (TSV)
-o, --output <path>: Write output to <path> instead of stdout. If the filename ends in .tsv or .tsv.gz, the output is automatically saved in TSV format. The output is gzip-compressed when the filename ends with .gz.

-l, --limit <n>: Limit the result to first <n> records (a limit value 0 means no limit)
-s, --skip-invalid: Skip invalid records that can’t be decoded
--strsim-threshold: The minimum score for string similarity comparisons (0 <= score <= 100)
--where: An expression for filtering records
--filter-normalization <form>: Transliterate the given filter or query expression into the specified Unicode normal form. Possible values: nfd, nfkd, nfc, nfkc. This option can also be specified by setting the environment variable MARC21_FILTER_NORMALIZATION.

COMMON OPTIONS

-p, --progress: If set, show a progress bar
-c, --compression: Specify compression level (0..=9)

EXIT STATUS

0 — Command succeeded.
1 — Command failed.

EXAMPLES

$ marc21 describe -s GND.mrc -o out.csv
10,220,897 records, 0 invalid | 472,874 records/s, elapsed: 00:00:21

$ head -10 out.csv
field,ind1,ind2,0,2,3,4,5,9,S,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,z
024,7, ,10220897,10863183,0,0,0,198362,0,10863183,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
034, , ,132557,135686,50,0,0,136105,0,0,0,0,136068,136068,136068,136068,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
035, , ,0,0,0,0,0,5495629,0,20441794,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6637796
040, , ,0,0,0,0,0,10220996,0,10220901,10220897,10220901,10220897,4524432,260659,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
042, , ,0,0,0,0,0,0,0,10220897,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
043, , ,0,0,0,0,0,15,0,0,0,9157636,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
065, , ,0,2617204,0,0,0,0,0,2617204,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
075, , ,0,20051640,0,0,0,0,0,0,20080983,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
079, , ,0,0,0,0,0,0,0,10220897,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12469759,0,0,0,5126056,0,0,0,0

marc21