inst/examples/publicationyear.md

In COMHIS/estc: English Short Title Catalogue (ESTC) Metadata Toolkit

title: "Publication year summaries" author: "Leo Lahti" date: "2018-06-21" output: markdown_document

Publication year

Publication year conversions

Publication year discarded

Publication year is available for 480208 documents (100%). The publication years span 1473-1800.

Publication frequency

Publication frequency information is available for 3251 documents (1%). The links are invalid if the lists are empty. The (estimated annual) frequencies are converted to plain text according to their closest match in this table.

Publication frequency accepted

Publication frequency conversions

Publication frequency discarded

Publication interval

Publication interval is available for 3483 documents (1%).

Publication interval accepted

Publication interval conversions

Publication interval discarded

Editions

Automated detection of potential first editions (first_edition field) identifies unique author-title pairs, and proposes the first occcurrence (earliest publication_year) as the first edition. If there are multiple instances from the same earliest year, they are all marked as potential first editions. Later need to check if this information is readily available in MARC.

There are 368847 unique documents with an identical title and author and 44346 of those have multiple occurrences, sometimes with different publication years. The earliest occurrence is suggested as the first edition.

This figure shows the number of first editions per decade.

COMHIS/estc documentation built on April 7, 2022, 4:53 p.m.