How not to work during a sabbatical

Posted on July 19, 2016 in Uncategorized by Eric Lease Morgan

This presentation — given at Code4Lib Midwest (Chicago, July 14, 2016) — outlines the various software systems I wrote during my recent tenure as an adjunct faculty member at the University of Notre Dame. (This presentation is also available as a one-page PDF handout designed to be duplex printed and folded in half as if it were a booklet.)

  • viewHow rare is rare? – In an effort to determine the “rarity” of items in the Catholic Portal, I programmatically searched WorldCat for specific items, counted the number of times it was held by libraries in the United States, and recorded the list of the holding libraries. Through the process I learned that most of the items in the Catholic Portal are “rare”, but I also learned that “rarity” can be defined as the triangulation of scarcity, demand, and value. Thus the “rare” things may not be rare at all.
  • Image processing – By exploiting the features and functions of an open source library called OpenCV, I started exploring ways to evaluate images in the same way I have been evaluating texts. By counting & tabulating the pixels in an image it is possible to create ratios of colors, do facial recognition, or analyze geometric composition. Through these processes is may be possible to supplement art history and criticism. For example, one might be able to ask things like, “Show me all of the paintings from Picasso’s Rose Period.”
  • Library Of Congress Name Authorities – Given about 125,000 MARC authority records, I wrote an application that searched the Library Of Congress (LOC) Name Authority File, and updated the local authority records with LOC identifiers, thus making the local authority database more consistent. For items that needed disambiguation, I created a large set of simple button-based forms allowing librarians to choose the most correct name.
  • MARC record enrichment – Given about 500,000 MARC records describing ebooks, I wrote a program that found the richest OCLC record in WorldCat and then merged the found record with the local record. Ultimately the local records included more access points and thus proved to be more useful in a library catalog setting.
  • OAI-PMH processing – I finally got my brain around the process of harvesting & indexing OAI-PMH content into VUFind. Whoever wrote the original OAI-PMH applications for VUFind did a very good job, but there is a definite workflow to the process. Now that I understand the workflow it is relatively easy ingest metadata from things like ContentDM, but issues with the way Dublin Core is implement still make the process challenging.
  • EEBO/TCP – Given the most beautiful TEI mark-up I’ve ever seen, I have systematically harvested the Early English Books Online (EEBO) content from the Text Encoding Initiative (TCP) and done some broad & deep but also generic text analysis subsets of the collection. Readers are able to search the collection for items of interest, save the full text to their own space for analysis, and have a number of rudimentary reports done against the result. This process allows the reader to see the corpus from a “distance”. Very similar work has been done against subsets of content from JSTOR as well as the HathiTrust.
  • VIAF Lookup – Given about 100,000 MARC authority records, I wrote a program to search VIAF for the most appropriate identifier and associate it with the given record. Through the process I learned two things: 1) how to exploit the VIAF API, and 2) how to exploit the Levenshtein algorithm. Using the later I was able to make automated and “intelligent” choices when it came to name disambiguation. In the end, I was able to accurately associate more than 80% of the authority names with VIAF identifiers.

My tenure as an adjunct faculty member was very much akin to a one year education except for a fifty-five year old. I did many of the things college students do: go to class, attend sporting events, go on road trips, make friends, go to parties, go home for the holidays, write papers, give oral presentations, eat too much, drink too much, etc. Besides the software systems outlined above, I gave four or five professional presentations, attend & helped coordinate five or six professional meetings, taught an online, semester-long, graduate-level class of on the topic of XML, took many different classes (painting, sketching, dance, & language) many times, lived many months in Chicago, Philadelphia, and Rome, visited more than two dozen European cities, painted about fifty paintings, bound & filled about two dozen hand-made books, and took about three thousand photographs. The only thing I didn’t do is take tests.

JSTOR Workset Browser

Posted on June 30, 2015 in Uncategorized by Eric Lease Morgan

Given a citations.xml file, this suite of software — the JSTOR Workset Browser — will cache and index content identified through JSTOR’s Data For Research service. The resulting (and fledgling) reports created by this suite enables the reader to “read distantly” against a collection of journal articles.

The suite requires a hodgepodge of software: Perl, Python, and the Bash Shell. Your milage may vary. Sample usage: cat etc/citations-thoreau.xml | bin/make-everything.sh thoreau

“Release early. Release often”.

Early English love was black & white

Posted on June 15, 2015 in Uncategorized by Eric Lease Morgan

Apparently, when it comes to the idea of love during the Early English period, everything is black & white.

Have harvested the totality of the EEBO-TCP (Early English Books Online – Text Creation Partnership) corpus. Using an extraordinarily simple (but very effective) locally developed indexing system, I extracted all the EEBO-TCP identifiers whose content was cataloged with the word love. I then fed these identifiers to a suite of software which: 1) caches the EEBO-TCP TEI files locally, 2) indexes them, 3) creates a browsable catalog of them, 4) supports a simle full text search engine against them, and 5) reports on the whole business (below). Through this process I have employed three sets of “themes” akin to the opposite of stop (function) words. Instead of specifically eliminating these words from the analysis, I specifically do analysis based on these words. One theme is “big” names. Another theme is “great” ideas. The third them is colors: white, black, red, yellow, blue, etc. Based on the ratio of each item’s number of words compared the number of times specific color words appear, I can generate a word cloud of colors (or colours) words, and you can “see” that in terms of love, everything is black & white. Moreover, the “most colorful” item is entitled The whole work of love, or, A new poem, on a young lady, who is violently in love with a gentleman of Lincolns-Inn by a student in the said art. — a charming, one-page document whose first two lines are:

LOVE is a thing that’s not on Reaſon laid,
But upon Nature and her Dictates made.

The corpus of the EEBO-TCP is some of the cleanest data I’ve ever seen. The XML is not only well-formed, but conforms the TEI schema. The metadata is thorough, (almost) 100% complete, (usually) consistently applied. It comes with very effective stylesheets, and the content is made freely easily available in a number of places. It has been a real joy to work with!

General statistics

An analysis of the corpus’s metadata provides an overview of what and how many things it contains, when things were published, and the sizes of its items:

  • Number of items – 156
  • Publication date range – 1493 to 9999 (histogram : boxplot)
  • Sizes in pages – 1 to 606 (histogram : boxplot)
  • Total number of pages – 12332
  • Average number of pages per item – 79

Possible correlations between numeric characteristics of records in the catalog can be illustrated through a matrix of scatter plots. As you would expect, there is almost always a correlation between pages and number of words. Are others exist? For more detail, browse the catalog.

Notes on word usage

By counting and tabulating the words in each item of the corpus, it is possible to measure additional characteristics:

Perusing the list of all words in the corpus (and their frequencies) as well as all unique words can prove to be quite insightful. Are there one or more words in these lists connoting an idea of interest to you, and if so, then to what degree do these words occur in the corpus?

To begin to see how words of your choosing occur in specific items, search the collection.

Through the creation of locally defined “dictionaries” or “lexicons”, it is possible to count and tabulate how specific sets of words are used across a corpus. This particular corpus employs three such dictionaries — sets of: 1) “big” names, 2) “great” ideas, and 3) colors. Their frequencies are listed below:

The distribution of words (histograms and boxplots) and the frequency of words (wordclouds), and how these frequencies “cluster” together can be illustrated:

Items of interest

Based on the information above, the following items (and their associated links) are of possible interest:

  • Shortest item (1 p.) – Now she that I louyd trewly beryth a full fayre face hath chosen her … (TEI : HTML : plain text)
  • Longest item (606 p.) – Psyche, or, Loves mysterie in XX canto’s, displaying the intercourse betwixt Christ and the soule / by Joseph Beaumont … (TEI : HTML : plain text)
  • Oldest item (1493) – This tretyse is of loue and spekyth of iiij of the most specyall louys that ben in the worlde and shewyth veryly and perfitely bi gret resons and causis, how the meruelous [and] bounteuous loue that our lord Ihesu cryste had to mannys soule excedyth to ferre alle other loues … Whiche tretyse was translatid out of frenshe into englyshe, the yere of our lord M cccc lxxxxiij, by a persone that is vnperfight insuche werke … (TEI : HTML : plain text)
  • Most recent (9999) – Ovid’s Art of love; in three books: : together with his Remedy of love: / translated into English verse, by several eminent hands: ; to which are added, The court of love, The history of love, and Armstrong’s Oeconomy of love. (TEI : HTML : plain text)
  • Most thoughtful item – A sermon directing what we are to do, after strict enquiry whether or no we truly love God preached April 29, 1688. (TEI : HTML : plain text)
  • Least thoughtful item – Amoris effigies, sive, Quid sit amor? efflagitanti responsum (TEI : HTML : plain text)
  • Biggest name dropper – Wit for money, or, Poet Stutter a dialogue between Smith, Johnson, and Poet Stutter : containing reflections on some late plays and particularly, on Love for money, or, The boarding school. (TEI : HTML : plain text)
  • Fewest quotations – Mount Ebal, or A heavenly treatise of divine love Shewing the equity and necessity of his being accursed that loves not the Lord Iesus Christ. Together with the motives meanes markes of our love towards him. By that late faithfull and worthy divine, John Preston, Doctor in Divinitie, chaplaine in ordinary to his Majestie, master of Emmanuel Colledge in Cambridge, and sometimes preacher of Lincolnes Inne. (TEI : HTML : plain text)
  • Most colorful – The whole work of love, or, A new poem, on a young lady, who is violently in love with a gentleman of Lincolns-Inn by a student in the said art. (TEI : HTML : plain text)
  • Ugliest – Eubulus, or A dialogue, where-in a rugged Romish rhyme, (inscrybed, Catholicke questions, to the Protestaut [sic]) is confuted, and the questions there-of answered. By P.A. (TEI : HTML : plain text)

Some automated analysis of Ralph Waldo Emerson’s works

Posted on June 12, 2015 in Uncategorized by Eric Lease Morgan

emerson

This page describes a corpus named emerson, and it was programmatically created with a program called the HathiTrust Research Center Workset Browser.

General statistics

An analysis of the corpus’s metadata provides an overview of what and how many things it contains, when things were published, and the sizes of its items:

  • Number of items – 62
  • Publication date range – 1838 to 1956 (histogram : boxplot)
  • Sizes in pages – 20 to 660 (histogram : boxplot)
  • Total number of pages – 11866
  • Average number of pages per item – 191

Possible correlations between numeric characteristics of records in the catalog can be illustrated through a matrix of scatter plots. As you would expect, there is almost always a correlation between pages and number of words. Are others exist? For more detail, browse the catalog.

Notes on word usage

By counting and tabulating the words in each item of the corpus, it is possible to measure additional characteristics:

Perusing the list of all words in the corpus (and their frequencies) as well as all unique words can prove to be quite insightful. Are there one or more words in these lists connoting an idea of interest to you, and if so, then to what degree do these words occur in the corpus?

To begin to see how words of your choosing occur in specific items, search the collection.

Through the creation of locally defined “dictionaries” or “lexicons”, it is possible to count and tabulate how specific sets of words are used across a corpus. This particular corpus employs three such dictionaries — sets of: 1) “big” names, 2) “great” ideas, and 3) colors. Their frequencies are listed below:

The distribution of words (histograms and boxplots) and the frequency of words (wordclouds), and how these frequencies “cluster” together can be illustrated:

Items of interest

Based on the information above, the following items (and their associated links) are of possible interest:

  • Shortest item (20 p.) – The wisest words ever written on war / by R.W. Emerson … Preface by Henry Ford. (HathiTrust : WorldCat : plain text)
  • Longest item (660 p.) – Representative men : nature, addresses and lectures. (HathiTrust : WorldCat : plain text)
  • Oldest item (1838) – An address delivered before the senior class in Divinity College, Cambridge, Sunday evening, 15 July, 1838 / by Ralph Waldo Emerson. (HathiTrust : WorldCat : plain text)
  • Most recent (1956) – Emerson at Dartmouth; a reprint of his oration, Literary ethics. With an introd. by Herbert Faulkner West. (HathiTrust : WorldCat : plain text)
  • Most thoughtful item – Transcendentalism : and other addresses / by Ralph Waldo Emerson. (HathiTrust : WorldCat : plain text)
  • Least thoughtful item – Emerson-Clough letters, edited by Howard F. Lowry and Ralph Leslie Rusk. (HathiTrust : WorldCat : plain text)
  • Biggest name dropper – A letter of Emerson : being the first publication of the reply of Ralph Waldo Emerson to Solomon Corner of Baltimore in 1842 ; With analysis and notes by Willard Reed. (HathiTrust : WorldCat : plain text)
  • Fewest quotations – The wisest words ever written on war / by R.W. Emerson … Preface by Henry Ford. (HathiTrust : WorldCat : plain text)
  • Most colorful – Excursions. Illustrated by Clifton Johnson. (HathiTrust : WorldCat : plain text)
  • Ugliest – An address delivered before the senior class in Divinity College, Cambridge, Sunday evening, 15 July, 1838 / by Ralph Waldo Emerson. (HathiTrust : WorldCat : plain text)

Some automated analysis of Henry David Thoreau’s works

Posted on June 12, 2015 in Uncategorized by Eric Lease Morgan

thoreau

This page describes a corpus named thoreau, and it was programmatically created with a program called the HathiTrust Research Center Workset Browser.

General statistics

An analysis of the corpus’s metadata provides an overview of what and how many things it contains, when things were published, and the sizes of its items:

  • Number of items – 32
  • Publication date range – 1866 to 1953 (histogram : boxplot)
  • Sizes in pages – 38 to 556 (histogram : boxplot)
  • Total number of pages – 7918
  • Average number of pages per item – 247

Possible correlations between numeric characteristics of records in the catalog can be illustrated through a matrix of scatter plots. As you would expect, there is almost always a correlation between pages and number of words. Are others exist? For more detail, browse the catalog.

Notes on word usage

By counting and tabulating the words in each item of the corpus, it is possible to measure additional characteristics:

Perusing the list of all words in the corpus (and their frequencies) as well as all unique words can prove to be quite insightful. Are there one or more words in these lists connoting an idea of interest to you, and if so, then to what degree do these words occur in the corpus?

To begin to see how words of your choosing occur in specific items, search the collection.

Through the creation of locally defined “dictionaries” or “lexicons”, it is possible to count and tabulate how specific sets of words are used across a corpus. This particular corpus employs three such dictionaries — sets of: 1) “big” names, 2) “great” ideas, and 3) colors. Their frequencies are listed below:

The distribution of words (histograms and boxplots) and the frequency of words (wordclouds), and how these frequencies “cluster” together can be illustrated:

Items of interest

Based on the information above, the following items (and their associated links) are of possible interest:

EEBO-TCP Workset Browser

Posted on June 11, 2015 in Uncategorized by Eric Lease Morgan

I have begun creating a “browser” against content from EEBO-TCP in the same way I have created a browser against worksets from the HathiTrust. The goal is to provide “distant reading” services against subsets of the Early English poetry and prose. You can see these fledgling efforts against a complete set of Richard Baxter’s works. Baxter was an English Puritan church leader, poet, and hymn-writer. [1, 2, 3]

EEBO is an acronym for Early English Books Online. It is intended to be a complete collection of English literature between 1475 through to 1700. TCP is an acronym for Text Creation Partnership, a consortium of libraries dedicated to making EEBO freely available in the form of XML called TEI (Text Encoding Initiative). [4, 5]

The EEBO-TCP initiative is releasing their efforts in stages. The content of Stage I is available from a number of (rather hidden) venues. I found the content on a University Michigan Box site to be the easiest to use, albiet not necessarily the most current. [6] Once the content is cached — in the fullest of TEI glory — it is possible to search and browse the collection. I created a local, terminal-only interface to the cache and was able to exploit authority lists, controlled vocabularies, and free text searching of metadata to create subsets of the cache. [7] The subsets are akin to HathiTrust “worksets” — items of particular interest to me.

Once a subset was identified, I was able to mirror (against myself) the necessary XML files and begin to do deeper analysis. For example, I am able to create a dictionary of all the words in the “workset” and tabulate their frequencies. Baxter used the word “god” more than any other, specifically, 65,230 times. [8] I am able to pull out sets of unique words, and I am able to count how many times Baxter used words from three sets of locally defined “lexicons” of colors, “big” names, and “great” ideas. Furthermore, I am be to chart and graph trends of the works, such as when they were written and how they cluster together in terms of word usage or lexicons. [9, 10]

I was then able to repeat the process for other subsets, items about: lutes, astronomy, Unitarians, and of course, Shakespeare. [11, 12, 13, 14]

The EEBO-TCP Workset Browser is not as mature as my HathiTrust Workset Browser, but it is coming along. [15] Next steps include: calculating an integer denoting the number of pages in an item, implementing a Web-based search interface to a subset’s full text as well as metadata, putting the source code (written in Python and Bash) on GitHub. After that I need to: identify more robust ways to create subsets from the whole of EEBO, provide links to the raw TEI/XML as well as HTML versions of items, implement quite a number of cosmetic enhancements, and most importantly, support the means to compare & contrast items of interest in each subset. Wish me luck?

More fun with well-structured data, open access content, and the definition of librarianship.

  1. Richard Baxter (the person) – http://en.wikipedia.org/wiki/Richard_Baxter
  2. Richard Baxter (works) – http://bit.ly/ebbo-browser-baxter-works
  3. Richard Baxter (analysis of works) – http://bit.ly/eebo-browser-baxter-analysis
  4. EEBO-TCP – http://www.textcreationpartnership.org/tcp-eebo/
  5. TEI – http://www.tei-c.org/
  6. University of Michigan Box site – http://bit.ly/1QcvxLP
  7. local cache of EEBO-TCP – http://bit.ly/eebo-cache
  8. dictionary of all Baxter words – http://bit.ly/eebo-browser-baxter-dictionary
  9. histogram of dates – http://bit.ly/eebo-browser-baxter-dates
  10. clusters of “great” ideas – http://bit.ly/eebo-browser-baxter-cluster
  11. lute – http://bit.ly/eebo-browser-lute
  12. astronomy – http://bit.ly/eebo-browser-astronomy
  13. Unitarians – http://bit.ly/eebo-browser-unitarian
  14. Shakespeare – http://bit.ly/eebo-browser-shakespeare
  15. HathiTrust Workset Browser – https://github.com/ericleasemorgan/HTRC-Workset-Browser

Developments with EEBO

Posted on June 8, 2015 in Uncategorized by Eric Lease Morgan

Here some of developments with the playing of my EEBO (Early English Books Online) data.

I used the repository on Box to get my content, and I mirrored it locally. [1, 2] I then looped through the content using XPath to extract rudimentary metadata, thus creating a “catalog” (index). Along the way I calculated the number of words in each document and saved that as a field of each “record”. Being a tab-delimited file, it is trivial to import the catalog into my favorite spreadsheet, database, editor, or statistics program. This allowed me to browse the collection. I then used grep to search my catalog, and save the results to a file. I searched for Richard Baxter. [6, 7, 8]. I then used an R script to graph the numeric data of my search results. Currently, there are only two types: 1) dates, and 2) number of words. [9, 10, 11, 12] From these graphs I can tell that Baxter wrote a lot of relatively short things, and I can easily see when he published many of his works. (He published a lot around 1680 but little in 1665.) I then transformed the search results into a browsable HTML table. The table has hidden features. (Can you say, “Usability?”) For example, you can click on table headers to sort. This is cool because I want sort things by number of words. (Number of pages doesn’t really tell me anything about length.) There is also a hidden link to the left of each record. Upon clicking on the blank space you can see subjects, publisher, language, and a link to the raw XML.

For a good time, I then repeated the process for things Shakespeare and things astronomy. [14, 15] Baxter took me about twelve hours worth of work, not counting the caching of the data. Combined, Shakespeare and astronomy took me less than five minutes. I then got tired.

My next steps are multi-faceted and presented in the following incomplete unordered list:

  • create browsable lists – the TEI metadata is clean and consistent. The authors and subjects lend themselves very well to the creation of browsable lists.
  • CGI interface – The ability to search via Web interface is imperative, and indexing is a prerequisite.
  • transform into HTML – TEI/XML is cool, but…
  • create sets – The collection as a whole is very interesting, but many scholars will want sub-sets of the collection. I will do this sort of work, akin to my work with the HathiTrust. [16]
  • do text analysis – This is really the whole point. Given the full text combined with the inherent functionality of a computer, additional analysis and interpretation can be done against the corpus or its subsets. This analysis can be based the counting of words, the association of themes, parts-of-speech, etc. For example, I plan to give each item in the collection a colors, “big” names, and “great” ideas coefficient. These are scores denoting the use of researcher-defined “themes”. [17, 18, 19] You can see how these themes play out against the complete writings of “Dead White Men With Three Names”. [20, 21, 22]

Fun with TEI/XML, text mining, and the definition of librarianship.

  1. Box – http://bit.ly/1QcvxLP
  2. mirror – http://dh.crc.nd.edu/sandbox/eebo-tcp/xml/
  3. xpath script – http://dh.crc.nd.edu/sandbox/eebo-tcp/bin/xml2tab.pl
  4. catalog (index) – http://dh.crc.nd.edu/sandbox/eebo-tcp/catalog.txt
  5. search results – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/baxter.txt
  6. Baxter at VIAF – http://viaf.org/viaf/54178741
  7. Baxter at WorldCat – http://www.worldcat.org/wcidentities/lccn-n50-5510
  8. Baxter at Wikipedia – http://en.wikipedia.org/wiki/Richard_Baxter
  9. box plot of dates – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/boxplot-dates.png
  10. box plot of words – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/boxplot-words.png
  11. histogram of dates – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/histogram-dates.png
  12. histogram of words – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/histogram-words.png
  13. HTML – http://dh.crc.nd.edu/sandbox/eebo-tcp/baxter/baxter.html
  14. Shakespeare – http://dh.crc.nd.edu/sandbox/eebo-tcp/shakespeare/
  15. astronomy – http://dh.crc.nd.edu/sandbox/eebo-tcp/astronomy/
  16. HathiTrust work – http://blogs.nd.edu/emorgan/2015/06/browser-on-github/
  17. colors – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/etc/theme-colors.txt
  18. “big” names – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/etc/theme-names.txt
  19. “great” ideas – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/etc/theme-ideas.txt
  20. Thoreau – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/thoreau/about.html
  21. Emerson – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/emerson/about.html
  22. Channing – http://dh.crc.nd.edu/sandbox/htrc-workset-browser/channing/about.html

Boxplots, histograms, and scatter plots. Oh, my!

Posted on June 5, 2015 in Uncategorized by Eric Lease Morgan

I have started adding visualizations literally illustrating the characteristics of the various “catalogs” generated by the HathiTrust Workset Browser. These graphics (box plots, histograms, and scatter plots) make it easier to see what is in the catalog and the features of the items it contains.

boxplot

histogram

scatterplot

For example, read the “about page” reporting on the complete works of Henry David Thoreau. For more detail, see the “home page” on GitHub.

HathiTrust Workset Browser on GitHub

Posted on June 3, 2015 in Uncategorized by Eric Lease Morgan

cloudI have put my (fledgling) HathiTrust Workset Browser on GitHub. Try:

https://github.com/ericleasemorgan/HTRC-Workset-Browser

The Browser is a tool for doing “distant reading” against HathiTrust “worksets”. Given a workset rsync file, it will cache the workset’s content locally, index it, create some reports against the content, and provide the means to search/browse the collection. It should run out of the box on Linux and Macintosh computers. It requires the bash shell and Python, which come for free on these operating systems. Some sample content is available at:

http://bit.ly/browser-thoreau-about

Developing code with and through GitHub is interesting. I’m learning.

HathiTrust Resource Center Workset Browser

Posted on May 26, 2015 in Uncategorized by Eric Lease Morgan

In my copious spare time I have hacked together a thing I’m calling the HathiTrust Research Center Workset Browser, a (fledgling) tool for doing “distant reading” against corpora from the HathiTrust. [1]

The idea is to: 1) create, refine, or identify a HathiTrust Research Center workset of interest — your corpus, 2) feed the workset’s rsync file to the Browser, 3) have the Browser download, index, and analyze the corpus, and 4) enable to reader to search, browse, and interact with the result of the analysis. With varying success, I have done this with a number of worksets ranging on topics from literature, philosophy, Rome, and cookery. The best working examples are the ones from Thoreau and Austen. [2, 3] The others are still buggy.

As a further example, the Browser can/will create reports describing the corpus as a whole. This analysis includes the size of a corpus measured in pages as well as words, date ranges, word frequencies, and selected items of interest based on pre-set “themes” — usage of color words, name of “great” authors, and a set of timeless ideas. [4] This report is based on more fundamental reports such as frequency tables, a “catalog”, and lists of unique words. [5, 6, 7, 8]

catalog

The whole thing is written in a combination of shell and Python scripts. It should run on just about any out-of-the-box Linux or Macintosh computer. Take a look at the code. [9] No special libraries needed. (“Famous last words.”) In its current state, it is very Unix-y. Everything is done from the command line. Lot’s of plain text files and the exploitation of STDIN and STDOUT. Like a Renaissance cartoon, the Browser, in its current state, is only a sketch. Only later will a more full-bodied, Web-based interface be created.

The next steps are numerous and listed in no priority order: putting the whole thing on GitHub, outputting the reports in generic formats so other things can easily read them, improving the terminal-based search interface, implementing a Web-based search interface, writing advanced programs in R that chart and graph analysis, provide a means for comparing & contrasting two or more items from a corpus, indexing the corpus with a (real) indexer such as Solr, writing a “cookbook” describing how to use the browser to to “kewl” things, making the metadata of corpora available as Linked Data, etc.

‘Want to give it a try? For a limited period of time, go to the HathiTrust Research Center Portal, create (refine or identify) a collection of personal interest, use the Algorithms tool to export the collection’s rsync file, and send the file to me. I will feed the rsync file to the Browser, and then send you the URL pointing to the results. [10] Let’s see what happens.

Fun with public domain content, text mining, and the definition of librarianship.

Links

  1. HTRC Workset Browser – http://bit.ly/workset-browser
  2. Thoreau – http://bit.ly/browser-thoreau
  3. Austen – http://bit.ly/browser-austen
  4. Thoreau report – http://bit.ly/browser-thoreau-about
  5. Thoreau dictionary (frequency list) – http://bit.ly/thoreau-dictionary
  6. usage of color words in Thoreau — http://bit.ly/thoreau-colors
  7. unique words in the corpus – http://bit.ly/thoreau-unique
  8. Thoreau “catalog” — http://bit.ly/thoreau-catalog
  9. source code – http://ntrda.me/1Q8pPoI
  10. HathiTrust Research Center Portal – https://sharc.hathitrust.org