8  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.

8.1 Complete Dataset Overview

Unique accepted UDC: 1

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

8.2 Subset Analysis: 1809-1917

Unique UDC (1809-1917): 1

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)

8.2.1 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