Everybody's Libraries

January 17, 2012

Why The Online Books Page is black for January 18

Filed under: censorship,copyright,online books — John Mark Ockerbloom @ 10:45 pm

As I mentioned in my last post, the US Congress is currently considering two bills, the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA),that would make it easy for copyright infringement complaints (whether ultimately justified or not) to wipe entire sites off the Net by various means, with little recourse or due process for site owners.

As the Electronic Frontier Foundation points out, these bills, if enacted, threaten censorship of a wide variety of sites that host controversial content or unfiltered public discourse, not just flagrant bootleg sites.   Sites hosting online books, in particular, could be cut off in various ways if they host a book that someone says infringes copyright in some way. (Even the threat of wholesale cutoff could cause them to take the book down, without any sort of judicial hearing.)  Even linking to a site that has content that’s the subject of a complaint could put a site at risk.

Many sites are “going dark” in various ways on the 18th, to raise awareness of these bills and show what it could be like if they became targets of SOPA or PIPA-enabled censorship.  This includes a number of the sites linked to from The Online Books Page.  For example, the Internet Archive, which hosts 2 million volumes, is out of service for 12 hours on the 18th.

The Online Books Page will not go offline, but we will turn many of our pages black for the 18th, as a warning both that some of the links on the site may be out of service, and that the site itself, which links to more than 1.4 million books on thousands of sites around the world, could be at risk if the bills currently under consideration in Congress pass.

My objection to the bills is not an objection to opposing copyright violations.  As the US Constitution recognizes, appropriately bounded copyrights serve a useful purpose in “promoting the progress of science and arts“, and a fair bit of the time I spend on The Online Books Page is devoted towards making sure the online books I curate do in fact comply with applicable copyright law.   Without clear and reasonable boundaries, though, copyright and its enforcement can inhibit rather than promote the progress of knowledge and the arts, by becoming tools of censorship and chilled speech.  I believe the current bills in Congress unfortunately do that.  If you are concerned about them as well, I encourage you to contact members of Congress to make your concerns known.

January 1, 2012

Public Domain Day 2012: Five things we can do in the US

Filed under: copyright,libraries,online books,open access — John Mark Ockerbloom @ 10:24 am

It’s New Year’s Day again, and in much of the world, this means another year’s worth of works enter the public domain.  That’s a cause for celebration, as Europe and many other countries that have “life+70 years” copyright terms welcome works by James Joyce, Virginia Woolf, Jelly Roll Morton, and Elizabeth von Arnim into the public domain.  The Communia Project’s Public Domain Day website focuses on works by these and many other authors that are entering (in many cases, re-entering) the public domain in “life+70 years” countries.  Meanwhie, folks in Canada, New Zealand, and other countries that have held the line at the “life+50 years” terms of the Berne Convention can now freely enjoy the works of people like James Thurber, Ernest Hemingway, and H.D.

There’s not so much excitement about Public Domain Day in the US, where no published works are scheduled to enter the public domain for another 7 years, due to a 20-year copyright extension enacted in 1998.  But Americans don’t have to simply sigh and contemplate what might have been if our copyright terms hadn’t been extended.  The new year still provides a number of important opportunities for Americans to improve access to the public domain.

1. Find and free newly public domain unpublished works

Some works are going into the public domain in the US today: works never published prior to 2003 (or copyrighted under US law prior to 1978) by authors who died in 1941– the same authors whose published works go into the public domain in Europe today.

But who would care about such obscure works? one might ask.  Well, if you’re at all interested in understanding the dense, allusion-laden fiction of Joyce, or the psychology of Woolf, or the jurisprudential thinking of Louis Brandeis, or the inner lives of any of the rest of the “class of 1941″, having the right to freely access, publish, and build on their unpublished works can be crucial.

Up until now, for instance, scholars studying James Joyce have often been frustrated by sharp restrictions and legal threats made by the administrator of Joyce’s literary estate.  In 2008, Rebecca Ganz characterized the administrator thus: “[His] primary purpose is to quell any scholarship that he finds distasteful or an invasion of his family’s privacy. He has a history of harassing authors and artists until they buckle under the strain of trying to obtain legal rights to quote from the late author’s writings.”  Scholars wishing to invoke Joyce’s unpublished works in their work have either had to undertake multi-year legal battles, or cut back on the lines of inquiry they might otherwise pursue.

American libraries and archives have many illuminating papers by authors who died in 1941– even non-US authors like Joyce and Woolf.  US digitizers, librarians, and archivists can open up and publicize these works.   In some cases, we’re uniquely positioned to do so, since their unpublished works may still be under copyright in some other countries.

2. Increase worldwide availability of public domain works

Many of the millions of digitized books on the Internet are hosted in the US, in large-scale repositories like Google Books, HathiTrust, and the Internet Archive.  Many of these services give limited access to non-US readers or materials.  Google and HathiTrust, for instance, limit non-US access by default to books published as long as 140 years ago, to avoid falling afoul of “life+70 years” copyright terms abroad.  JSTOR likewise limits access to non-US journal volumes published in 1870 or later.

With another year’s worth of copyrights expiring in “life+70 years” countries, it should be safe for these US-based services to also open up worldwide access to another year’s worth of works, further freeing up the public domain.  HathiTrust is also willing to manually review copyrights on specific books to open up access.  If you come across any books in HathiTrust solely by authors who died in 1941 (or before) that are currently labeled only as “public domain in the United States”, you can request that they review it for opening up access worldwide.  Just use the “Feedback” button at the bottom of the book’s HathiTrust page, or the suggestion form on my Online Books Page; and make sure you ask specifically for non-US access.

3. Restore access to obscure copyrighted works from 1936 (and earlier)

After libraries and archives expressed concerns about the fate of obscure works under longer copyright terms, Congress included a special exemption in their 1998 copyright tem extension.  The exemption, codified as section 108(h) of the copyright law, states that “during the last 20 years of any term of copyright of a published work, a library or archives, including a nonprofit educational institution that functions as such, may reproduce, distribute, display, or perform in facsimile or digital form a copy or phonorecord of such work, or portions thereof, for purposes of preservation, scholarship, or research”, under certain conditions.  In particular, if the institution finds, after a reasonable investigation, that such a work is not “subject to normal commercial exploitation” (such as by being in print) and cannot “be obtained at a reasonable price”, and no rightsholder has filed a claim otherwise, the work qualifies for this special exemption.  As of this year’s Public Domain Day, qualifying publications from 1936 join what is now 14 years of works in this category.

So far, I have found very little digitized content online where this exemption is explicitly invoked.  (There are advantages to explicitly doing so, both because it helps clarify the right to use the material, and helps prevent inadvertent unauthorized propagation of the works, such as the commercial reprints of digitized books that are now common on many large bookselling sites.)  Yet many of the works in HathiTrust’s (currently suspended) orphan works initiative, and in the Internet Archive’s lending library, and more besides, could well qualify for this treatment– and unlike orphan works, where legislation has yet to be passed, the exemption for these materials is already explicitly authorized by statute.

Providing online access for these works is not without controversy.  A 2002 article by lawyer Mary Minow details some of the potential possibilities and risks.   While she concludes that libraries can put such works on the Web, the recent Author’s Guild complaint in its lawsuit against HathiTrust includes some push-back against this idea. But as the public domain in the US recedes further into history, and digital library projects increasingly look for ways to make our cultural heritage available online, American libraries would do well to proactively establish and exercise these rights for older works now languishing in obscurity.

4. Strengthen and sustain coalitions for reasonable copyright limits

The curtailment of the public domain is just one aspect of the overreach of copyright law in the US and elsewhere.  Right now, Congress is considering two bills, the Stop Online Piracy Act (SOPA) and the PROTECT IP Act (PIPA), whose enforcement provisions threaten to disrupt the core structures of the Internet and enable far-reaching censorship, in the name of stopping piracy.  Supporters of these bills hoped to have them passed by Christmas, but opposition from both “left” and “right” sides of the political spectrum has slowed the process down, caused some companies to withdraw support, and led to the proposal of less harmful alternatives for fighting piracy.

It’s still quite possible that SOPA and PIPA will pass, though.   Public Domain Day provides an opportunity for Americans to reflect on some of the good reasons for limiting the power and scope of copyright enforcement, and to redouble efforts to keep those limits reasonable.  Moreover, a coalition that can stop SOPA and PIPA can also work to prevent further extensions of copyright terms.  This can ensure that Americans will have more to celebrate in Public Domain Days to come– especially starting in 2019, when the remaining 1923 copyrights should finally expire in the US.

5. Give copyrights of your own to the public domain

Of course, those wishing to maximize public access and use of their works don’t have to wait for their copyrights to expire on their own.  They can dedicate them to the public domain any time they want.  Public Domain Day is a particularly auspicious time to make such gifts, no matter what country you’re in.  And with tools like the CC0 declaration, it’s easier than ever to do so.

A few years ago, I started an annual personal tradition of reviewing copyrights to works I’d created more than 14 years ago (the original initial term of copyright enacted by the founders of the US, and also approximately the ideal copyright term given in a recent economic analysis) and dedicating works to the public domain that I didn’t feel needed further copyright.  Accordingly, today I dedicate all the work of my creation that I published in 1997, and for which I still control rights, to the public domain.  For me, this consists primarily of websites like The Online Books Page as of that year, and other online writings.  But others have dedicated more high-profile material to the public domain after the same term.   And I’d be very happy to hear from others who are making similar dedications today (whether or not it’s after 14 years).

So, happy Public Domain Day to everyone in the US and elsewhere!  We all have things to celebrate, and things we can do, in the name of the public domain.

October 7, 2011

My mother’s orphan

Filed under: copyright,findingada,online books,open access,people,preservation,sharing,teaching — John Mark Ockerbloom @ 5:06 pm

Before my mother was pregnant with me, she was working on a book.

The book had begun its gestation at least a year before. She had been teaching math in Massachusetts, and was involved with the Madison Project, one of the initiatives that arose from the “new math” movement of the 1960s.  What excited her, and what I caught from her not long after I was born, was the sense of discovery and play that was encouraged in the Madison teaching style.  The primary focus wasn’t so much on imparting and drilling facts and rules, or on mundane applications, but on finding patterns, solving puzzles, and figuring out the secrets of numbers and geometry and the other mathematical constructs that underlie our world. Some project participants planned a series of books that would help bring out this sense of discovery and exploration in math classes.

Two small children in the house may have delayed my mother’s ambitions, but we didn’t stop her.  When I was in kindergarten, the piles of papers in my parents’ bedroom went away, and my mother proudly showed me her new book.  The book, Discoveries in Essential Mathematics, was co-written with Ramon Steinen, and published by Charles E. Merrill. Though the textbook was written for middle schoolers, I remember reading through the book after my mother showed it to me, solving the simpler problems, and smiling when I saw my name or my sister’s in an example.

She got small royalty checks for a few years, but the book was out of print by the late 1970s, never reaching a second edition.  We kept some copies in our basement, but I didn’t know of any library that held it.  When I visited the Library of Congress as a middle schooler, wrongly convinced that they had every book ever published, I remember my disappointment when I couldn’t find Mom’s book in their card catalog.

My mother eventually retired from teaching, and the enthusiasm and talent I’d gotten from Mom for math shifted into computing, and then into digital libraries.  And when my kids reached school age, I decided to try putting her book online.  In an era of large classes, detailed state standards, and high-stakes standardized tests, it might not be a viable standard textbook any more, but I think it’s still great for curious kids who show an interest in math.

Mom thought that was a great idea.  But she didn’t know if she could grant permission on her own.  Although long out of print, the book’s copyright had automatically renewed in 2000 under US copyright law, and she wasn’t sure if she had to get the consent of her publisher or co-author before she could give me the go-ahead. She didn’t know how to reach her co-author, and her old imprint was long gone.  Even its acquirer had itself been acquired by a large conglomerate some time ago.  So I let the idea drop, thinking I’d come back to it later when I had a little time to research the copyright.

But not long after, she started a long slide into dementia, and was soon in no position to give permission to anyone.  If her book had been practically an “orphan work” before, due to uncertainty over rights, it was even more so now.  There was no trouble locating the author; but no way of getting valid permission from someone definitely known to hold the rights.

Mom died this past winter, four years after my Dad had reluctantly moved her into the nursing home for good, and four weeks after he’d made his usual daily visit, gone back home, and had a fatal heart attack.  After we paid the last of the bills, and threw out the contents of the basement (where a burst pipe ruined all the books, papers, and other things they kept down there), what remained of what they had would now go to me and my siblings.

I still had a copy at home of the teacher’s edition of Mom’s book that she had once given to Grandma.  And between my mother’s funeral and the burst pipe, I’d taken a student edition out of their basement for my kids to read.  But any faint hope of finding publishing contracts or rights assignment documents was obliterated after the pipe burst.  The basic questions were: had Mom signed her rights to the book away, as many academic authors do? If so, had she gotten them back at some point?  Or had she never had the rights in the first place, as sometimes happens with textbook authors under “work for hire” contracts?

The copyright page of the book, and the record in the 1972 Catalog of Copyright Entries, show the publisher as the copyright claimant, so I couldn’t assume she had the rights.   But I also doubted whether I could get a clear answer, or reasonable licensing terms, from the company that had eventually acquired the assets of Mom’s original publisher.

I eventually found what I needed to know on a trip to Washington, DC.  While attending a meeting on digital format registries, I realized that I was in the same building as the Copyright Office.   So after the meeting, I got a reader’s card, went upstairs, and consulted the librarians there.  We confirmed that, under the automatic renewal laws of the time, the copyright to Mom’s book would have reverted in 2000 to whoever had been declared the “author” in the book in the original registration record.   Moreover, in the absence of any contrary arrangement, any co-owner of a copyright can authorize publication, as long as they split any proceeds with the other copyright owners.

Since I was planning just to put the book online for free, the only question remaining was: who was listed as the author on the original registration: the publisher who claimed the copyright, or my mother and Dr. Steinen?  It’s not clear from the Catalog of Copyright Entries, but the original registration certificate would state it.  And the one copy known to exist of that certificate was in the archives of the Copyright Office where I was sitting.

Twenty minutes later, I had the certificate in front of me.  The name on the “claimant” line was indeed the publisher’s, but the names on the “author” line were Steinen and Ockerbloom.  My mother’s orphan was mine to claim.

There are a lot more books out there like hers.  Since I added records for Hathi Trust‘s public domain books to The Online Books Page, I’ve gotten requests to curate hundreds of out of print, largely forgotten books that are still meaningful to readers online.  Many of the people who opt to leave contact information  live in places where  books tend to be hard to get or pay for. Many others, judging from their names, seem to be related to the authors of the books they suggest. These readers have found the books after Hathi, or Google, or the Internet Archive, has resurfaced them online, and the readers want these books to live on.  If there were an easy, inexpensive, uncontroversially legal way to also bring back books that are still in copyright, but no longer commercially exploited, I’m sure I could fulfill a lot of requests for those books too.

For now, though, I’ll bring back the one orphan book I’ve been given. And I thank my mother for writing it, and the other women and men who have poured so much of their energy and teaching into their books, and the librarians of all kinds who help ensure those books stay accessible to readers who value them.  I’ll try my best to keep your legacies alive.

April 9, 2011

Opt in for open access

Filed under: copyright,libraries,online books,open access — John Mark Ockerbloom @ 8:40 am

There’s been much discussion online about Judge Chin’s long-awaited decision to reject the settlement proposed by Google and authors and publishers’ organizations over the Google Books service. Settlement discussions continue (and the court has ordered a status conference for April 25).  But it’s clear that it will be a while before this case is fully settled or decided.

Don’t count on a settlement to produce a comprehensive library

When the suit is finally resolved, it will not enable the comprehensive retrospective digital library I had been hoping for.  That, Chin clearly indicated, was an over-reach.  The  proposed settlement would have allowed Google to sell access to most pre-2009 books published in the English-speaking world whose rightsholders had not opted out.   But, as Chin wrote, “the case was about the use of an indexing and searching tool, not the sale of complete copyrighted works.”  The changes in the American copyright regime that the proposed settlement entailed, he wrote, were too sweeping for a court to approve.

Unless Congress makes changes in copyright law, then, a rightsholder has to opt in for a copyrighted book to be made readable on Google (or on another book site).  Chin’s opinion ends with a strong recommendation for the parties to craft a settlement that would largely be based on “opt-in”.  Of course, an “opt in” requirement necessarily excludes orphan works, where one cannot find a rightsholder to opt in.  And as John Wilkin recently pointed out, it’s likely that a lot of the books held by research libraries are orphan works.

Don’t count on authors to step up spontaneously

Chin expects that many authors will naturally want to opt in to make their works widely available, perhaps even without payment.  “Academic authors, almost by definition, are committed to maximizing access to knowledge,” he writes.  Indeed, one of the reasons he gives for rejecting the settlement is the argument, advanced by Pamela Samuelson and some other objectors, that the interests of academic and other non-commercially motivated authors are different from those of the commercial organizations that largely drove the settlement negotiations.

I think that Chin is right that many authors, particularly academics, care more about having their work appreciated by readers than about making money off of it.  And even those who want to maximize their earnings on new releases may prefer freely sharing their out of print books to keeping them locked away, or making a pittance on paywall-mediated access.  But that doesn’t necessarily mean that we’ll see all, or even most, of these works “opted in” to a universally accessible library.  We’ve had plenty of experience with institutional repositories showing us that even when authors are fine in principle with making their work freely available, most will not go out of their way to put their work in open-access repositories, unless there are strong forces mandating or proactively encouraging it.

Don’t count on Congress to solve the problem

The closest analogue to a “mandate” for making older books generally available would be orphan works legislation.    If well crafted, such a law could make a lot of books available to the public that now have no claimants, revenue, or current audience, and I hope that a coalition can come together to get a good law passed. But an orphan works law could take years to adopt (indeed, it’s already been debated for years). There’s no guarantee on how useful or fair the law that eventually gets passed would be, after all the committees and interest groups are done with it.  And even the best law would not cover many books that could go into a universal digital library.

Libraries have what it takes, if they’re proactive

On the other hand, we have an unprecedented opportunity right now to proactively encourage authors (academic or otherwise) to make their works freely available online.  As Google and various other projects continue to scan books from library collections, we now have millions of these authors’ books deposited in “dark” digital archives.  All an interested author has to do is say the word, and the dark  copy can be lit up for open access.  And libraries are uniquely positioned to find and encourage the authors in their communities to do this.

It’s now pretty easy to do, in many cases.  Hathi Trust, a coalition of a growing number of research institutions, currently has over 8 million volumes digitized from member libraries.  Most of the books are currently inaccessible due to copyright.  But they’ve published a permission agreement form that an author or other rightsholder can fill out and send in if they want to make their book freely readable online.  The form could be made a bit clearer and more visible, but it’s workable as it is.  As editor of The Online Books Page, I not infrequently hear from people who want to share their out of print books, or those of their ancestors, with the world.  Previously, I had to worry about how the books would get online.  Now I usually can just verify it’s in Hathi’s collection, and then refer them to the form.

Google Books also lets authors grant access rights through their partner program.  Joining the program is more complicated than sending in the Hathi form, and it’s more oriented towards selling books than sharing them.  But Google Books partners can declare their books freely readable in full if they wish, and can give them Creative Commons licenses (as they can with Hathi).  Google has even more digitized books in its archives than Hathi does.

So, all those who would love to see a wide-ranging (if not entirely comprehensive), globally accessible digital library now have a real opportunity to make it happen.  We don’t have to wait for Congress to act, or  some new utopian digital library to arise.  Thanks to mass digitization, library coalitions like Hathi’s, and the development of simplified, streamlined rights and permissions processes, it’s easier than ever for interested authors (and heirs, and publishers) to make their work freely available online.  If those us involved in libraries, scholarship, and the open access movement work to open up our own books, and those of our colleagues, we can light up access to the large, universal digital library that’s now waiting for us online.

December 25, 2010

October 29, 2010

October 18, 2010

September 17, 2010

September 8, 2010

July 31, 2010

Keeping subjects up to date with open data

Filed under: data,discovery,online books,open access,sharing,subjects — John Mark Ockerbloom @ 11:51 pm

In an earlier post, I discussed how I was using the open data from the Library of Congress’ Authorities and Vocabularies service to enhance subject browsing on The Online Books Page.  More recently, I’ve used the same data to make my subjects more consistent and up to date.  In this post, I’ll describe why I need to do this, and why doing it isn’t as hard as I feared that it might be.

The Library of Congress Subject Headings (LCSH) is a standard set of subject names, descriptions, and relationships, begun in 1898, and periodically updated ever since. The names of its subjects have shifted over time, particularly in recent years.  For instance, recently subject terms mentioning “Cookery”, a word more common in the 1800s than now, were changed to use the word “Cooking“, a term that today’s library patrons are much more likely to use.

It’s good for local library catalogs that use LCSH to keep in sync with the most up to date version, not only to better match modern usage, but also to keep catalog records consistent with each other.  Especially as libraries share their online books and associated catalog records, it’s particularly important that books on the same subject use the same, up-to-date terms.  No one wants to have to search under lots of different headings, especially obsolete ones, when they’re looking for books on a particular topic.

Libraries with large, long-standing catalogs often have a hard time staying current, however.  The catalog of the university library where I work, for instance, still has some books on airplanes filed under “Aeroplanes”, a term that recalls the long-gone days when open-cockpit daredevils dominated the air.  With new items arriving every day to be cataloged, though, keeping millions of legacy records up to date can be seen as more trouble than it’s worth.

But your catalog doesn’t have to be big or old to fall out of sync.  It happens faster than you might think.   The Online Books Page currently has just over 40,000 records in its catalog, about 1% of the size of my university’s.   I only started adding LC subject headings in 2006.  I tried to make sure I was adding valid subject headings, and made changes when I heard about major term renamings (such as “Cookery” to “Cooking”).  Still, I was startled to find out that only 4 years after I’d started, hundreds of subject headings I’d assigned were already out of date, or otherwise replaced by other standardized headings.  Fortunately, I was able to find this out, and bring the records up to date, in a matter of hours, thanks to automated analysis of the open data from the Library of Congress.  Furthermore, as I updated my records manually, I became confident I could automate most of the updates, making the job faster still.

Here’s how I did it.  After downloading a fresh set of LC subject headings records in RDF, I ran a script over the data that compiled an index of authorized headings (the proper ones to use), alternate headings (the obsolete or otherwise discouraged headings), and lists of which authorized headings were used for which alternate headings. The RDF file currently contains about 390,000 authorized subject headings, and about 330,000 alternate headings.

Then I extracted all the subjects from my catalog.  (I currently have about 38,000 unique subjects.)  Then I had a script check each subject see if it was listed as an authorized heading in the RDF file.  If not, I checked to see if it was an alternate heading.  If neither was the case, and the subject had subdivisions (e.g. “Airplanes — History”) I removed a subdivision from the end and repeated the checks until a term was found in either the authorized or alternate category, or I ran out of subdivisions.

This turned up 286 unique subjects that needed replacement– over 3/4 of 1% of my headings, in less than 4 years.  (My script originally identified even more, until I realized I had to ignore the simple geographic or personal names.  Those aren’t yet in LC’s RDF file, but a few of them show up as alternate headings for other subjects.)  These 286 headings (some of them the same except for subdivisions) represented 225 distinct substitutions.  The bad headings were used in hundreds of bibliographic records, the most popular full heading being used 27 times. The vast majority of the full headings, though, were used in only one record.

What was I to replace these headings with?  Some of the headings had multiple possibilities. “Royalty” was an alternate heading for 5 different authorized headings: “Royal houses”, “Kings and rulers”, “Queens”, “Princes” and “Princesses”.   But that was the exception rather than the rule.  All but 10 of my bad headings were alternates for only one authorized heading.  After “Royalty”, the remaining 9 alternate headings presented a choice between two authorized forms.

When there’s only 1 authorized heading to go to, it’s pretty simple to have a script do the substitution automatically.  As I verified while doing the substitutions manually, nearly all the time the automatable substitution made sense.  (There were a few that didn’t: for instance. when “Mind and body — Early works to 1850″ is replaced by “Mind and body — Early works to 1800“, works first published between 1800 and 1850 get misfiled.  But few substitutions were problematic like this– and those involving dates, like this one, can be flagged by a clever script.)

If I were doing the update over again, I’ll feel more comfortable letting a script automatically reassign, and not just identify, most of my obsolete headings.  I’d still want to manually inspect changes that affect more than one or two records, to make sure I wasn’t messing up lots of records in the same way; and I’d also want to manually handle cases where more than one term could be substituted.  The rest– the vast majority of the edits– could be done fully automatically.  The occasional erroneous reassignment of a single record would be more than made up by the repair of many more obsolete and erroneous old records.  (And if my script logs changes properly, I can roll back problematic ones later on if need be.)

Mind you, now that I’ve brought my headings up to date once, I expect that further updates will be quicker anyway.  The Library of Congress releases new LCSH RDF files about every 1-2 months.  There should be many fewer changes in most such incremental updates than there would be when doing years’ worth of updates all at once.

Looking at the evolution of the Library of Congress catalog over time, I suspect that they do a lot of this sort of automatic updating already.  But many other libraries don’t, or don’t do it thoroughly or systematically.  With frequent downloads of updated LCSH data, and good automated procedures, I suspect that many more could.  I have plans to analyze some significantly larger, older, and more diverse collections of records to find out whether my suspicions are justified, and hope to report on my results in a future post.  For now, I’d like to thank the Library of Congress once again for publishing the open data that makes these sorts of catalog investigations and improvements feasible.

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