
''The Indigo Book: An Open and Compatible Implementation of A Uniform System of Citation'' (formerly ''Baby Blue's Manual of Legal Citation'') is a
free content version of the ''
Bluebook
''The Bluebook: A Uniform System of Citation'' is a style guide that prescribes the most widely used legal citation system in the United States. It is taught and used at a majority of U.S. law schools and is also used in a majority of feder ...
'' system of
legal citation
Legal citation is the practice of crediting and referring to authoritative documents and sources. The most common sources of authority cited are court decisions (cases), statutes, regulations, government documents, treaties, and scholarly writin ...
. Founded by
New York University
New York University (NYU) is a private research university in New York City. Chartered in 1831 by the New York State Legislature, NYU was founded by a group of New Yorkers led by then- Secretary of the Treasury Albert Gallatin.
In 1832, ...
professor Christopher Jon Sprigman, authored collectively by Sprigman and a group of NYU law students, and published by
Public.Resource.Org, it is an adaptation based on the 10th edition of the ''Bluebook'' as published by the
Harvard Law Review Association in 1958, which had entered the
public domain
The public domain (PD) consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. Because those rights have expired, ...
in the United States because its
copyright
A copyright is a type of intellectual property that gives its owner the exclusive right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, education ...
had expired due to
non-renewal.
The project was inspired by correspondence between Public.Resource.Org's founder
Carl Malamud
Carl Malamud (born July 2, 1959) is an American technologist, author, and public domain advocate, known for his foundation Public.Resource.Org. He founded the Internet Multicasting Service. During his time with this group, he was responsible fo ...
and a
Nagoya University
, abbreviated to or NU, is a Japanese national research university located in Chikusa-ku, Nagoya. It was the seventh Imperial University in Japan, one of the first five Designated National University and selected as a Top Type university of ...
academic, who was threatened by lawyers representing the HLRA over plans to incorporate the ''Bluebook'' system into the
open source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
citation management program
Zotero
Zotero () is a free and open-source reference management software to manage bibliographic data and related research materials, such as PDF files. Features include web browser integration, online syncing, generation of in-text citations, footnot ...
. Sprigman has argued that the system of citation expressed in the ''Bluebook'' was effectively public domain because its mandated usage in courts made it an "
edict of government
Edict of government is a technical term associated with the United States Copyright Office's guidelines and practices that comprehensively includes laws (in a wide sense of that term), which advises that such submissions will neither be accepted no ...
", and because, barring trivial changes, the then-current 19th edition was nearly identical to the public domain 10th edition. Sprigman stated that the project's main goal was to allow the Bluebook's system of citation to be widely available at no cost, and allow others to collaborate on it under an
open-source model
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
.
The ''Indigo Book'' is an unofficial substitute to the official ''Bluebook'' and is not endorsed by the Harvard Law Review Association; in December 2015, the project faced legal threats over its original name, ''Baby Blue's'', which lawyers representing the HLRA felt was too similar to the ''Bluebook'' trademark. These threats led to the renaming of the guide to ''The Indigo Book'' in March 2016.
History
Nagoya University
, abbreviated to or NU, is a Japanese national research university located in Chikusa-ku, Nagoya. It was the seventh Imperial University in Japan, one of the first five Designated National University and selected as a Top Type university of ...
Graduate School of Law academic Frank Bennett had wished to include support for the ''
Bluebook
''The Bluebook: A Uniform System of Citation'' is a style guide that prescribes the most widely used legal citation system in the United States. It is taught and used at a majority of U.S. law schools and is also used in a majority of feder ...
''—a widely used system of legal citations, into the
open source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
citation management software
Zotero
Zotero () is a free and open-source reference management software to manage bibliographic data and related research materials, such as PDF files. Features include web browser integration, online syncing, generation of in-text citations, footnot ...
. However, lawyers representing the
Harvard Law Review Association, who publishes the ''Bluebook,'' asserted that the ''Bluebook''
's inclusion of "carefully curated examples, explanations and other textual materials" made it a
copyright
A copyright is a type of intellectual property that gives its owner the exclusive right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, education ...
ed work.
Carl Malamud
Carl Malamud (born July 2, 1959) is an American technologist, author, and public domain advocate, known for his foundation Public.Resource.Org. He founded the Internet Multicasting Service. During his time with this group, he was responsible fo ...
, head of the organization
Public.Resource.Org, was informed by Bennett about the refusals.
New York University School of Law
New York University School of Law (NYU Law) is the law school of New York University, a private research university in New York City. Established in 1835, it is the oldest law school in New York City and the oldest surviving law school in Ne ...
professor Christopher Jon Sprigman caught wind of Malamud's correspondence; he had argued that the system of citation expressed in the ''Bluebook'' was in the
public domain
The public domain (PD) consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable. Because those rights have expired, ...
because its widely mandated use in the court system made it an
edict of government
Edict of government is a technical term associated with the United States Copyright Office's guidelines and practices that comprehensively includes laws (in a wide sense of that term), which advises that such submissions will neither be accepted no ...
,
going on to state that "in this case, a copyright is being used to keep something private that we all have to use."
Additionally,
U.S. copyright law
The copyright law of the United States grants monopoly protection for "original works of authorship". With the stated purpose to promote art and culture, copyright law assigns a set of exclusive rights to authors: to make and sell copies of thei ...
states that a "
system" is ineligible for copyright protection.
Research conducted by Malamud and Sprigman found that the 10th edition of the ''Bluebook'', published in 1958, had fallen into the public domain because its copyright had not been
renewed, as required by U.S. law at the time. On October 6, 2014, Sprigman sent a letter of response to the Harvard Law Review Association, disclosing these findings and arguing that the content of the then-current 19th edition was nearly identical to the 10th barring trivial changes. Thus, he also announced an intent to publish a
free-content version of the ''Bluebook'' known as ''Baby Blue'', which would be adapted from the public domain text of the 10th edition with "newly-created material that implements the Bluebook's system of citation in a fully usable form."
Sprigman explained that "every person, including every poor person, should be able to cite the law. Imprisoned litigants,
pro se litigants, legal clinics, small law firms and solo practitioners — all of them need better access to our system of legal citation if the law is to work for them and for their clients. And that means free access."
Sprigman also stated that the use of an
open-source development model and licensing would allow others to contribute to and help improve the system; he argued that the ''Bluebook'' in its current form was "over-prescriptive and rigid" and "a barrier to entry to our legal system," going on to ask, "what other standard of this importance to the American public would be entrusted to a group so small, unrepresentative, closed to input, and beyond both supervision and discipline?"
Trademark issues

In December 2015, following
Twitter
Twitter is an online social media and social networking service owned and operated by American company Twitter, Inc., on which users post and interact with 280-character-long messages known as "tweets". Registered users can post, like, and ...
postings by Malamud teasing the upcoming release of ''Baby Blue'', the Harvard Law Review Association threatened legal action against the project, as it believed that the name ''Baby Blue'' had a
confusing similarity
In trademark law, confusing similarity is a test used during the examination process to determine whether a trademark conflicts with another, earlier mark, and also in trademark infringement proceedings to determine whether the use of a mark infri ...
to the "Bluebook"
trademark
A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from oth ...
, and requested a copy of the publication to perform intellectual property examinations under a presumption that it may be substantially similar to the copyrighted work. Sprigman objected to the trademark claims, feeling that "the idea they own the name 'blue' for a manual for legal citations is ridiculous." Following the threats, a group of over 120
Yale Law School
Yale Law School (Yale Law or YLS) is the law school of Yale University, a private research university in New Haven, Connecticut. It was established in 1824 and has been ranked as the best law school in the United States by '' U.S. News & Worl ...
students issued a letter in support of the ''Baby Blue'' project.
In response to the trademark concerns, the name of the guide was changed to ''The Indigo Book'' on March 31, 2016.
See also
*
Case citation
Case citation is a system used by legal professionals to identify past court case decisions, either in series of books called Reporter (law), reporters or law reports, or in a neutral style that identifies a decision regardless of where it is re ...
*''
Maroonbook
The ''Maroonbook'' is a system of legal citation that is intended to be simpler and more straightforward than the more widely used ''Bluebook''. It was developed at the University of Chicago and is the citation system for the ''University of Chica ...
''
*''
ALWD Citation Manual
''ALWD Guide to Legal Citation'', formerly ''ALWD Citation Manual'', is a style guide providing a legal citation system for the United States, compiled by the Association of Legal Writing Directors. Its first edition was published in 2000, und ...
''
References
External links
*{{Official website, https://law.resource.org/pub/us/code/blue/IndigoBook.html
PDF version
Legal citation guides
Public domain books