Download — 11th Edition

Beyond the website, this edition is published in several forms. The data, free; the e-book, for a modest price.

The data. The complete text, under CC BY-SA 4.0, from its source. The plain text can of course be had anywhere. What is unique is its organization, in three indexes: the cross-reference graph, joining every article to those it names; the topic index, classifying more than 90% of the articles by subject; and the contributor graph, resolving each author's initials to names, credentials and a biographical article where available. The topic index is faithfully reproduced from the original; the other two exist only in this edition.

• Corpus bundletar.gz, 94 MBEach of the 36,691 articles as one record, its text in Markdown, with metadata, sections and cross-references.
• TEI-P5 editiontar.gz, 105 MBThe scholarly encoding: 37,225 TEI documents, one per article, plus a corpus catalog. This is the only form that carries what the printed page did — small caps, centring, rules and floats, tables and figures as structure rather than prose, mathematics as TeX. Every document validates against the TEI Consortium's own schema, checked on every build. Transliterations added by the transcribers are attributed rather than merged silently into the text. Archived at Zenodo with a citable DOI: 10.5281/zenodo.22072145.
• Hugging Face datasethostedThe corpus bundle's records, for anyone who would rather load it than download it.
• Maps bundletar.gz, 228 MBThe edition's full-color fold-out maps — the celebrated Perthes maps among them — as printed in 1911 and, where available, the Stieler Hand-Atlas originals they were engraved from, at full resolution. The same maps can be browsed here.

The book. The entire encyclopedia as a DRM-free EPUB: all 36,691 articles and more than 10,000 illustrations in one file, with maximum fidelity to the original. Fully cross-linked, browsable by topic and by volume, with instant search of the corpus — full-text and by title, with no connection required.

• The complete editionEPUB, $39.99Corrected editions free to purchasers.
• Volume 1EPUB, freeThe first volume of the same book.

Amazon Kindle's .kpf format, unfortunately, refuses an EPUB of this size and complexity. Single-volume .kpfs would be possible, but not terribly useful.

The interface. A programmatic interface, which will include full-text search, article retrieval, and traversal of the topics, contributors and cross-references, is in preparation.