9 Universal Decimal Classification
MARC: 080a
Polish_udk.R is a function designed to harmonize the ‘Universal Decimal Classification’ field. Currently, it only harmonizes entries categorized under the bibliography level of Monograph/Item.
In total, there are 1229782 entries in Fennica, with 1227631 missing UDC values in our dataset.
9.1 Complete Dataset Overview
UDC is available for 2151 documents (0%).
1965 single UDC entries (91.35%)
186 multiple UDC entries (8.65%)
1227631 missing/NA entries (100%)
There are 2151 entries where the primary UDK is “Undetermined” (100%).
Unrecognized UDC: 348
Download UDC harmonized dataset
UDC codes are from The National Library of Finland; new custom abbreviations can be added in this table.
| UDC | Entries (n) | Fraction (%) |
|---|---|---|
| Undetermined | 2151 | 0.2 |
9.2 Subset Analysis: 1809-1917
50 single UDC entries (92.59%)
4 multiple UDC entries (7.41%)
66835 missing/NA entries (100%)
There are 54 entries where the primary UDK is “Undetermined” (100%)
Download UDC harmonized dataset (1809-1917)
9.2.1 Top UDC for 1809-1917
Number of titles assigned with each UDC (top-10). For a complete list, see accepted UDC (1809-1917).
| UDC | Entries (n) | Fraction (%) |
|---|---|---|
| Undetermined | 54 | 0 |