11K Latin Texts

Here’s a bunch of OCR’d Latin texts from the Internet Archive used in our JCDL 2011 and JoCCH 2012 papers (see below). These are all texts that have been identified as being written primarily in Latin (via automatic language ID on the text of the book + manual confirmation). The data released here consists of the entire books, not just the Latin portions (though the Latin parts can easily be extracted by running language ID (e.g., langid.py) on them.

What’s useful about this data is:

  • It’s big (11,261 texts spanning two millennia, containing 1.38 billion tokens in total).
  • The metadata for these volumes contains not just the date of publication for a specific edition of a work, but a window for the date of composition as well (as determined by undergraduate students in Classics; see JCDL 2011 for more details), which enables historical analysis that the date of publication can’t. The metadata may have a few errors and style differences between the different annotators, but I’m putting it up on Github for version control if anyone spots mistakes and wants to correct them.

Data

  • All texts in DJVU XML, with formatting for paragraph/line breaks, etc. (9GB) [Download]
  • All texts in plain text format (3.9GB) [Download]
  • Metadata [Github repo]. For those who’d like to contribute, an additional 10,248 likely Latin texts from the Internet Archive await estimation of their date of composition in that repo (and we can add those texts to the corpus once they’ve been dated.)

Here’s the book count distribution over time (date of composition):


latin_dist

Word Embeddings

As one example of what you can do with this data (noisy as it is), here are 100-dimensional word embeddings for 2,961,867 Latin word types found by running word2vec on the entire corpus. (Use findsimilar.py to find closest terms for any query.) There’s a great research project to be had using low-dimensional embeddings like these + the small training data in the Latin treebank and elsewhere to build a great out-of-domain POS tagger/syntactic parser/named entity recognizer.

	> vinum
	vinum	1.0
	oleum	0.894354480555
	yinum	0.858317845967
	vinum^	0.842112594341
	vinura	0.83957568134
	vinum;	0.822299200682
	vinuni	0.821769408403
	bibere	0.807991818248
	vino	0.800621695189
	potum	0.79569430363

	> amo
	amo	1.0
	diligo	0.774796101974
	doleo	0.747367250735
	gaudeo	0.746037276053
	amavi	0.712329502828
	odi	0.707246956214
	laudo	0.70180182963
	amas	0.694574626822
	facio	0.693545457507
	amo;	0.692264420071

	> canis
	canis	1.0
	lepus	0.714111694504
	felis	0.713660779852
	piscis	0.691726821547
	serpens	0.679602742502
	ovis	0.663469608113
	rabidi	0.660877606572
	vulpis	0.659607780275
	equus	0.656672813035
	frigidus	0.656263352602	

OCR quality

The OCR quality varies by volume but is generally abysmal (but that may be ok for what you want to use it for.) Here are two samples at the extremes:

	lam si qui ex Homero aliisque eum pleraque hausisse dicunt,
	posteriorum omnino ea condicio est, ut quae nova invenerint, si
	quando ab antiquiore eadem dicta esse repertum sit, ab eo sua
	tkei: SiiimiemfiBgMiffem^ ^mvemsfimUttrUffHk^ &rejcijps
	inejiyfmteneris in 4rimiiQjuem im ntprtHisjC^JiiSdnmalibHsJk-
	fim ego exf€r$mJkm)iMdem TaionefimUiter concUdert msfiffu

Yowza!

Publications

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