Analysis of DDC numbers in K10plus union catalogue

This dataset contains an analysis of DDC notations in K10plus union catalogue (as of 2023-12-31).

• Distinct DDC numbers found in K10plus: 700.717
• Fully decomposed: 473.161 (67%)
• Distinct atomic elements: 32.154

Sources

The data is based on:

• Normalized subject indexing data of K10plus library union catalog
• Decomposition of DDC numbers (coli-ana)

The dataset consists of:

• ddc-frequencies.tsv: sorted DDC notations found in K10plus records, each with number of records it is used in (tsv format)
• ddc-decomposition.ndjson.gz: full analysis of DDC notations in newline-delimited JSKOS (including incomplete analysis and non-atomic elements) (jskos format)
• ddc-decomposition.csv: atomic DDC elements from decomposition. First column is original number, following columns are atomic elements (csv format)
• ddc-atoms.tsv: atomic DDC numbers found in fully decomposed numbers of K10plus catalogue (tsv format)
  With the following fields:

• • atom: atomic DDC number which cannot be decomposed further
  • number: number of distinct DDC numbers this atom is used in
  • records: number of K10plus records this atom is used in

Contributors

• Verbundzentrale des GBV (VZG)
• Jakob Voß
• Ulrike Reiner