README.md

K10plus DDC

This repository contains scripts to analyze, convert and publish Dewey Decimal Classification (DDC) numbers found K10plus catalogue. The analysis is mainly based on coli-ana DDC number decomposition.

See subdirectory publication for script to generate the data publication https://doi.org/10.5281/zenodo.10569321

Installation

npm ci

Usage

analyze.js

Read a list of (numerically sorted) DDC numbers and generate analysis with coli-ana

k10plus-patch.js

The script bin/k10plus-patch.js

1. reads PICA+ records (or PPNs to retrieve records from K10plus)
2. extracts DDC fields from the records
3. retrieves DDC analysis (cached in a local database)
4. and emits PICA Patch files to modify records

Usage: k10plus-patch [options] < file

Check and extend DDC numbers in PICA records of K10plus catalogue

Options:
  -a, --api <URL>        coli-ana API endpoint
  -c, --continue <ppn>   continue after given PPN (expect sorted)
  -f, --format <name>    PICA+ serialization (default: plain)
  -i, --input <file>     input file (default: - for STDIN)
  -d, --database <file>  optional SQLite file for caching
  -p, --ppns             input is list of PPNs instead of PICA records
  -h, --help             display help for command

simplify-for-pdf.jq

Given the full analysis from coli-ana API in JSKOS format as published at https://doi.org/10.5281/zenodo.10569320, this jq script can be used to simplify the JSKOS records for creation of PDF files for each DDC number:

zcat ddc-decomposition.ndjson.gz | jq -c -f simplify-for-pdf.jq -c > ddc-pdf-data.ndjson

count.js

Calculate frequency of individual DDC elements in analysis result and emit as CSV or JSKOS concept list

Data in this repository

• ddcs sorted DDC numbers found in K10plus with number of occurrences. Data generated from K10plus Subjects.

See Also

• coli-ana API to analyze DDC numbers
• K10plus Subjects to analyze, extract and publish subject indexing data (including DDC but also other systems) from K10plus