Arcangelo Massari

*Blog post by Ivan Heibi (Universiy of Bologna) and Arcangelo Massari
(University of Bologna).*

OpenCitations publishes the COCI dataset after each new release in three
main formats: CSV, N-Triples, and Scholix (see
<https://opencitations.net/download#coci>). The CSV format is the most
popular and downloaded one due to its comprehensive data organization
(i.e. tabular format) and smaller size (compared to the other formats
provided). Therefore, this is also the format we suggest using for a
local process of the entire COCI dataset. 

The CSV dumps of COCI are uploaded on [Figshare](https://figshare.com/).
You can check and download the last dump released from
<https://doi.org/10.6084/m9.figshare.6741422>. The dump consists of one
main ZIP file, including other smaller ZIP archives (one for each
release) containing the actual CSV files (Figure 1).

<figure class="wp-block-image">
<img
src="https://lh4.googleusercontent.com/5OExKFZIoSf_4wT5zgu26GLp2nwm2uDJoD2iZh1rkyz2D5gZMF0i7R9zCkGM3Ozu_pXuxn2Z0NqtWUIDhwVwdzuavO0Y2H-xabepSgUllgCukCX0Y1XzpBuN7fHhpm6bLtPfBLBf0dkMuBy6xfNM4nR3SDAPaWVa44BCna2VzRhFuY4oPeG3pR7Vpg"
decoding="async" />
</figure>

*Figure 1. The contents of the COCI CSV dataset (after the August 2022
release)*

It is possible to process this data **without unzipping the internal
archives**, thus saving a lot of disk space. In this tutorial, we will
see how to achieve this in **Python.** Same process could be done in
other programming languages.

## Processing the COCI dump using Python {#processing-the-coci-dump-using-python .wp-block-heading}

### Step 1) Downloading the COCI dump {#step-1-downloading-the-coci-dump .wp-block-heading}

First, you need to download the last CSV dump release of COCI from
<https://doi.org/10.6084/m9.figshare.6741422> and decompress **only**
the external archive. After this operation, you should have a folder
containing the internal ZIP files such as in Figure 1.

**Note:** It is beneficial to decompress the external archive because
doing so does not increase the space occupied on the disk (compressing
archives results in a compression rate of 0%) and because working on
nested archives would significantly increase RAM requirements. 

### Step 2) Working with the ZIP files {#step-2-working-with-the-zip-files .wp-block-heading}

Python provides the built-in
[zipfile]{style="font-family: terminal, monaco, monospace"} module,
whose [ZipFile]{style="font-family: terminal, monaco, monospace"} class
allows you to create, read, write, edit and list the contents of a ZIP
file. Given as input the path of the root directory containing all the
ZIP files
([FOLDER_PATH]{style="font-family: terminal, monaco, monospace"}), the
process elaborates each of these files on a different iteration. Each
cycle initializes a
[ZipFile]{style="font-family: terminal, monaco, monospace"} object by
specifying the path to the ZIP file
([archive_path]{style="font-family: terminal, monaco, monospace"}).

``` wp-block-code
from zipfile import ZipFile
import os

for archive_name in os.listdir(FOLDER_PATH):        
    archive_path = os.path.join(FOLDER_PATH, archive_name)
    with ZipFile(archive_path) as archive:
        # ...
```

### Step 3) Accessing the ZIP files {#step-3-accessing-the-zip-files .wp-block-heading}

Use the [namelist()]{style="font-family: terminal, monaco, monospace"}
method to return the list of CSV files contained in each archive. Then
to open the inner CSV files, simply cycle through the list of names and
feed them to the
[open()]{style="font-family: terminal, monaco, monospace"} method of the
[ZipFile]{style="font-family: terminal, monaco, monospace"} instance,
i.e. [archive]{style="font-family: terminal, monaco, monospace"} in the
example below.

``` wp-block-code
from zipfile import ZipFile
import os

for archive_name in os.listdir(FOLDER_PATH):
    archive_path = os.path.join(FOLDER_PATH, archive_name)
    with ZipFile(archive_path) as archive:
        for csv_name in archive.namelist():
            with archive.open(csv_name) as csv_file:
                # ...
```

### Step 4) Reading the CSVs {#step-4-reading-the-csvs .wp-block-heading}

The .open() method returns a buffer. To read the CSV file as a list of
dictionaries (i.e. represent each row of the CSV in dictionary format,
e.g., [{"column1″:"val1",
"column2″:"val2"}]{style="font-family: terminal, monaco, monospace"}) we
need to transform the buffer using the
[TextIOWrapper]{style="font-family: terminal, monaco, monospace"} class
and read it using the
[DictReader]{style="font-family: terminal, monaco, monospace"} class of
[csv]{style="font-family: terminal, monaco, monospace"}. Then we convert
the result of
[DictReader]{style="font-family: terminal, monaco, monospace"} into a
list. 

``` wp-block-code
from io import TextIOWrapper
from zipfile import ZipFile
import os

for archive_name in os.listdir(FOLDER_PATH):
    archive_path = os.path.join(FOLDER_PATH, archive_name)
    with ZipFile(archive_path) as archive:
        for csv_name in archive.namelist():
            with archive.open(csv_name) as csv_file:
                reader = csv.DictReader(io.TextIOWrapper(csv_file))
                rows = list(reader)
                # ...
```

### Step 5) Processing the CSVs content

Now you can go through each row of the list and process the citation
data as you want. The following example prints the
[citing]{style="font-family: terminal, monaco, monospace"} and
[cited]{style="font-family: terminal, monaco, monospace"} entity of each
citation in the dump. 

``` wp-block-code
from io import TextIOWrapper
from zipfile import ZipFile
import os

for archive_name in os.listdir(FOLDER_PATH):
    archive_path = os.path.join(FOLDER_PATH, archive_name)
    with ZipFile(archive_path) as archive:
        for csv_name in archive.namelist():
            with archive.open(csv_name) as csv_file:
                reader = csv.DictReader(io.TextIOWrapper(csv_file))
                rows = list(reader)
                # Process the CSV here
                for r in rows:
                    print("Citing entity:",r["citing"])
                    print("Cited entity:",r["cited"])
```

 


<em>
 Blog post by Ivan Heibi (Universiy of Bologna) and Arcangelo Massari (University of Bologna).
</em>
OpenCitations publishes the COCI dataset after each new release in three main formats: CSV, N-Triples, and Scholix (see https://opencitations.net/download#coci). The CSV format is the most popular and downloaded one due to its comprehensive data organization (i.e. tabular format) and smaller size (compared to the other formats provided).

Tutorial: how to process COCI’s zipped CSV dump without decompressing it

More than a year ago, Ginny Hendricks, Director of Member &amp;

Chiara Di Giambattista

[Posted on August 10th 2022 by Chiara Di Giambattista]{.tadv-color
style="color:#1f2074"}

::: {.wp-block-columns .is-layout-flex .wp-container-1}
:::

::: {.wp-block-columns .is-layout-flex .wp-container-3}
::: {.wp-block-column .is-layout-flow style="flex-basis:100%"}
More than a year ago, Ginny Hendricks, Director of Member & Community
Outreach for Crossref, and a valued member of the OpenCitations
International Advisory Board, published on the [[[Crossref
blog](https://www.crossref.org/blog/){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"} the post "[[[The
road ahead: our strategy through
2025](https://www.crossref.org/blog/the-road-ahead-our-strategy-through-2025/){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"}". In order to
describe all Crossref's principles and activities, Ginny presented the
Crossref strategic planning framework as a diagram summarizing
Crossref's statements, key messages and truths. The clarity and
immediacy of the diagram were such that we adapted it to present 
OpenCitations' own statements and goals. The resulting poster
"OpenCitations -- what does the future hold?" was presented by our
Director David Shotton at the OASPA2021 conference, and can be found in
this [[[blog
post](https://opencitations.hypotheses.org/1355){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"}.
:::
:::

Although the poster offered a wide overview of OpenCitations values,
unique traits, benefits and plans, it differed slightly from Ginny's
original diagram, in particular because it lacked a "Mission Statement",
scattering the relevant information within the "Values" and "Principles"
boxes. Indeed, at that time (September 2021), we didn't have a clearly
defined Mission Statement.

Nevertheless, the creation of that poster was crucial in helping us
start to articulate more clearly the purpose and meaning of
OpenCitations. As David underlined in his post "[[[From little
acorns...a retrospective on
OpenCitations](https://opencitations.hypotheses.org/1296){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"}", since 2018
OpenCitations activities have progressively increased and, with them,
the number of related [[journal articles, conference papers and
technical definitions]{.underline
style="text-decoration: underline"}](https://opencitations.net/publications){data-type="URL"
data-id="https://opencitations.net/publications"}. OpenCitations'
involvement in international networks and collaborations (such as
[[[SCOSS](https://opencitations.hypotheses.org/991){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"} and the
[[[OpenAIRE-Nexus
project](https://opencitations.hypotheses.org/1510){rel="noopener"
target="_top"}]{.underline}]{style="color: #0000ff"}), together with our
need of identifying and reaching out to new stakeholders to assure
OpenCitations' development and sustainability, has made it necessary to
publicly define OpenCitations' mission, unique strengths and next
developmental steps.

After numerous revisions, aided by wise advice from members of the
[[[OpenCitations Advisory Board
members](https://opencitations.net/about){target="_top"
rel="noopener"}]{.underline}]{style="color: #0000ff"}, we're now happy
to publish the following three OpenCitations documents: **

***[OpenCitations Mission
Statement](https://zenodo.org/record/6976670){target="_blank"
rel="noreferrer noopener" data-type="URL"
data-id="https://zenodo.org/record/6976670"},***

***[The Uniqueness of
OpenCitations](https://zenodo.org/record/6976696){target="_blank"
rel="noreferrer noopener" data-type="URL"
data-id="https://zenodo.org/record/6976696"}***   and **

***[OpenCitations -- Present Status and Future
Plans](https://zenodo.org/record/6976691){target="_blank"
rel="noreferrer noopener" data-type="URL"
data-id="https://zenodo.org/record/6976691"}***,

which together provide a summary of why we exist and where we are
heading.

We are particularly proud of the definition of OpenCitations' primary
mission, namely

"*to harvest and openly publish accurate and comprehensive metadata
describing the world's academic publications and the scholarly citations
that link them, and to preserve ongoing access to this information by
secure archiving.*"

The ***Mission Statement*** also presents brief descriptions of the
OpenCitations context, our vision, our value proposition and our
relationship with the community and stakeholders.

***The Uniqueness of OpenCitations*** provides the answer to the
question '*Why choose to use OpenCitations?'*, and is a detailed
presentation of OpenCitations' benefits.

***OpenCitations -- Present Status and Future Plans*** summarizes
OpenCitations' ongoing activities, that can be quickly visualized on
[[[our public
roadmap](https://opencitations.hypotheses.org/1519){target="_top"
rel="noopener"}]{.underline}]{style="color: #0000ff"}. It also
introduces the OpenCitations Working Groups, served by the members of
the OpenCitations International Advisory Board, which are currently
working on the themes of governance evolution and community building,
with the common purpose of driving OpenCitations along the path from
being a 'sustainable infrastructure' (in
[[[POSI](https://openscholarlyinfrastructure.org/){target="_top"
rel="noopener"}]{.underline}]{style="color: #0000ff"} terms) to being an
enduring ***community led and*** ***financially sustained
infrastructure.***

In fulfilling our mission and reaching our goals, the support and vital
interest of our community members is fundamental. We request that you,
as a member of our community, provide us with feedback on these
documents and the ideas they contain, or indeed to ask for
clarifications, to help us improving our mission and our communications
to explain it. You can reach us here:
[[[contact@opencitations.net](mailto:contact@opencitations.net){target="_top"
rel="noopener"}]{.underline}]{style="color: #0000ff"}.

Thank you!


Posted on August 10th 2022 by Chiara Di Giambattista  More than a year ago, Ginny Hendricks, Director of Member &amp;

New documents that present OpenCitations’ mission, unique benefits, present status and future plans

Want to keep yourself updated about the ongoing activities of
OpenCitations? We have now publicly released the OpenCitations Roadmap,
available on Trello.com:

[https://trello.com/b/RprHYoKL/opencitations](https://trello.com/b/RprHYoKL/opencitations){rel="noreferrer noopener"
target="_blank"}

::: {.wp-block-image}
<figure class="aligncenter size-large">
<img
src="https://opencitations.hypotheses.org/files/2022/07/Trello-e1658853546289-500x282.png"
class="wp-image-1736" decoding="async" loading="lazy"
srcset="https://opencitations.hypotheses.org/files/2022/07/Trello-e1658853546289-500x282.png 500w, https://opencitations.hypotheses.org/files/2022/07/Trello-e1658853546289-300x169.png 300w, https://opencitations.hypotheses.org/files/2022/07/Trello-e1658853546289-768x433.png 768w, https://opencitations.hypotheses.org/files/2022/07/Trello-e1658853546289.png 1214w"
sizes="(max-width: 500px) 100vw, 500px" width="500" height="282" />
</figure>
:::

The OpenCitations Roadmap consists of a board fulfilled with
colour-labelled cards which present the goals so far reached, the
present projects and activities, and the future plans. By clicking on
the cards, it is possible to visualize a description for each activity,
the progress state, and who in the OpenCitations team is working on it.

The OpenCitations Roadmap covers all kinds of activities divided
according to the scope, identified by the coloured labels, in
particular:

- light blue for the technical development, such as the development of
  the software for the creation of the new database OpenCitations Meta
  and of DOCI, the OpenCitations Index of DataCite open DOI-to-DOI
  citations, and the re-engineering of the infrastructure and the
  website;
- green for the data model implementation;
- yellow for the data development, such as the bi-monthly COCI releases;
- purple for the events and outreach activities.

The cards also highlight the activities related to the two [EC-funded
projects](https://opencitations.hypotheses.org/1510){data-type="URL"
data-id="https://opencitations.hypotheses.org/1510"} OpenCitations is
involved in, OpenAIRE Nexus (blue label) and RISIS2 (orange label). We
thank the OpenAIRE team for the help and suggestions during the Roadmap
review process.

The OpenCitations Roadmap is an open work in progress that will reflect
the developments and growth of OpenCitations. At OpenCitations, we don't
want this Roadmap to be just an online 'showcase', but a room in which
to share ideas and opinions. We invite you -- the members of our
community, our stakeholders, the other Open Science actors, researchers,
and librarians, and anyone who is interested in OpenCitations activities
-- to add a comment or a question in the '[Leave
feedback](https://trello.com/c/60vgJa74){rel="noreferrer noopener"
target="_blank"}' card. This will help us to better understand our
strong and weak points, and to stay in touch with the needs and thoughts
of the community.

In this way, supplementing the conventional communications channels of
[email](mailto:contact@opencitations.net) and the social platforms (our
[blog](https://opencitations.wordpress.com/),
[Twitter](https://twitter.com/opencitations),
[LinkedIn](https://www.linkedin.com/company/opencitations)), the
OpenCitations Roadmap will become a new virtual place for dialogue,
where you can directly contribute to improve OpenCitations.


Want to keep yourself updated about the ongoing activities of OpenCitations? We have now publicly released the OpenCitations Roadmap, available on Trello.com:  https://trello.com/b/RprHYoKL/opencitations  The OpenCitations Roadmap consists of a board fulfilled with colour-labelled cards which present the goals so far reached, the present projects and activities, and the future plans.

The OpenCitations Roadmap is now publicly available on Trello

University of Oxford

David M. Shotton

In his [call for open
citations](https://boingboing.net/2018/04/14/open-graphs.html){target="_blank"
rel="noreferrer noopener"}, Dario Taraborelli hailed the scholarly
citation graph (in which the nodes (vertices) are individual academic
publications and the links (edges) represent bibliographic citations
from one publication to another) as one of humankind's most important
intellectual achievements.

We all understand that the inclusion within our own academic
publications of bibliographic references to the works of others is one
of the most explicit ways of acknowledging the thoughts, discoveries,
achievements and influences of other scholars, and their contributions
to our own work. Not only does what we gain from their publications
enable us to make intellectual progress, by "standing on the shoulders
of giants" as Newton once famously observed \[1\], but the influence of
these publications extends forward in time across the entire
intellectual landscape, like gigantic shadows cast at sunset, whether or
not those influenced by these publications have occasion to reference
them in their own works.

<figure class="wp-block-image size-large">
<a href="https://opencitations.files.wordpress.com/2021/08/3.jpg"><img
src="https://opencitations.files.wordpress.com/2021/08/3.jpg?w=1024"
class="wp-image-1291" decoding="async" loading="lazy"
srcset="https://opencitations.hypotheses.org/files/2021/08/3.jpg 1600w, https://opencitations.hypotheses.org/files/2021/08/3-300x169.jpg 300w, https://opencitations.hypotheses.org/files/2021/08/3-500x281.jpg 500w, https://opencitations.hypotheses.org/files/2021/08/3-768x432.jpg 768w, https://opencitations.hypotheses.org/files/2021/08/3-1536x864.jpg 1536w, https://opencitations.hypotheses.org/files/2021/08/3-1568x882.jpg 1568w"
sizes="(max-width: 1600px) 100vw, 1600px" width="1600"
height="900" /></a>
</figure>

A bibliographic citation is not only "[a conceptual directional link
from a citing entity to a cited entity, created by a human performative
act of making a
citation](http://purl.org/spar/cito/Citation){target="_blank"
rel="noreferrer noopener"}", but it is additionally both enduring and
retrospective. Enduring, because once made it persists for ever within
the global corpus of scholarly literature, and retrospective because
(with the exception of occasional contemporaneous citations) the cited
publication predates the citing publication.

At the anterior margin of a crawling cell, cellular protrusive extension
(for example of a pseudopodium) is achieved by the catalysed
polymerization of new filaments of the cytoskeletal protein actin from
attachment sites on an existing stationary actin filament network,
pushing the cell margin forward \[2\]. The scholarly citation network
(or citation graph, the two terms here being used interchangeably) is
similarly dynamic and temporally directional, being extended forward as
new works of scholarship are published. Extension of knowledge is
achieved by the catalytic inspiration provided by existing academic
publications, themselves temporally stationary within the expanding
citation network, leading to the publication of new works of scholarship
that cite these previous publications and thus extend the citation
network further into the future. The citation graph is thus not just an
acyclic directed graph, but an acyclic *temporally* directed graph.
Indeed, it is this temporal aspect of the citation network that is one
of its most important features.

To use another analogy, the human genealogical tree is inherently
multidimensional and difficult to represent pictorially in its entirety,
because each new birth brings together the family trees of the child's
two parents. However, unless the parents are seriously promiscuous, the
resulting genealogical tree is not impossibly complex. In contrast, the
scholarly citation network is much more highly interlinked, since each
new publication cites not just two but many preceding ('parent')
publications, which themselves may beget many other citations.

Visualization of the global scholarly citation graph, or portions of it,
is thus inherently difficult, and the important temporal aspect of the
graph is the one ignored by almost every method used for visualizing
aspects of that graph. Existing methods may take the broad view, showing
the links, and the strength of those links, between one scholarly domain
and another, thus visualizing the 'structure of science'. Alternatively,
they may take a more detailed view of a small section of the graph,
visualize the proximity of individual publications to one another. Often
a radial display is chosen for this, that shows in closest proximity
those papers directly referenced by the selected publication in the
centre, then at a greater radius those papers referenced by the cited
papers shown in the inner circle, and so on. Because of the graph's
complexity, such displays quickly looses intelligibility after two
citation links.

Among a small number of visualization applications that do *not* ignore
the temporal aspect of the graph is Citeology, a temporally based
citation network visualization tool developed some years ago by Justin
Matejka and colleagues at the design software company Autodesk \[3\].
Unfortunately, this innovative software prototype was not central to
that company's mission, development ceased, and the Citeology Java app
is no longer available. However, in his last email to me, [Justin
Matejka](https://www.autodesk.com/research/people/justin-matejka){rel="noreferrer noopener"
target="_blank"} kindly offered to help others re-create this
application.

There is thus an urgent need for innovative new open-source
visualization tools that will clearly and dynamically display portions
of the global citation graph, for example the direct and indirect
citation connections between any two publications or any two
individuals, along the temporal axis of publication date. **Developers
within the open science community please step forward!**

*References*

\[1\] Isaac Newton, in a 1675 letter to Robert Hooke, wrote "**If I have
seen further it is by standing on the shoulders of Giants**."
[https://discover.hsp.org/Record/dc-9792/](https://discover.hsp.org/Record/dc-9792/){target="_blank"
rel="noreferrer noopener"}

\[2\] Bruce Alberts *et al*. (2014). Molecular Biology of the Cell.
6^th^ Edition. Garland Science. Chapter 16, The Cytoskeleton.

\[3\] Justin Matejka, Tovi Grossman, George Fitzmaurice (2012).
Citeology: Visualizing Paper Genealogy. ACM Extended Abstracts on Human
Factors in Computing Systems.
[https://www.autodesk.com/research/publications/citeology](https://www.autodesk.com/research/publications/citeology){rel="noreferrer noopener"
target="_blank"}
[https://d2f99xq7vri1nk.cloudfront.net/CiteologyVideo.mp4](https://d2f99xq7vri1nk.cloudfront.net/CiteologyVideo.mp4){rel="noreferrer noopener"
target="_blank"}


In his call for open citations, Dario Taraborelli hailed the scholarly citation graph (in which the nodes (vertices) are individual academic publications and the links (edges) represent bibliographic citations from one publication to another) as one of humankind’s most important intellectual achievements.

Reflections on the global citation graph

## The OpenCitations Enhancement Project funded by Sloan

The [Alfred P. Sloan Foundation](https://sloan.org/){target="_blank"
rel="noopener noreferrer"}, which funds research and education in
science, technology, engineering, mathematics and economics, including a
number of key technology projects relating to scholarly communication,
has agreed to fund **The OpenCitations Enhancement Project**, a new
project to develop and enhance the OpenCitations Corpus.

As readers of this blog will know, the [OpenCitations
Corpus](http://opencitations.net/){target="_blank"
rel="noopener noreferrer"} is an open scholarly citation database that
freely and legally makes available accurate citation data (academic
references) to assist scholars with their academic studies, and to serve
knowledge to the wider public.

## Objectives

**The OpenCitations Enhancement Project**, funded by the Sloan
Foundation for 18 months from May 2017, will make the OpenCitations
Corpus (OCC) more useful to the academic community both by significantly
expanding the volume of citation data held within the Corpus, and by
developing novel data visualizations and query services over the stored
data.

At OpenCitations, we will achieve these objectives in the following
ways:

\(a\) By establishing a new powerful physical server to handle the
Corpus data and offer adequate performance for query services.

\(b\) By increasing the rate of data ingest into the Corpus, by
integrating with server 30 small data-ingest computers, Raspberry Pi
3Bs, working in parallel to harvest references, thus increasing the
current rate of corpus data ingest some thirty-fold to about half a
million citation links per day.

\(c\) By employing a post-doctoral computer science research engineer
specifically to develop information visualisation interfaces and
sense-making tools that will both provide smart ways of envisaging and
comprehending the citation data stored within the OpenCitations Corpus,
and will also ease the task of manual curation of the OCC.

## Personnel

This post-doctoral appointment will start in the autumn of 2017, once
the new hardware has been commissioned and programmed. We seek a highly
intelligent, skilled and motivated individual who is an expert in Web
Interface Design and Information Visualization, and who can demonstrate
a commitment to increasing the openness of scholarly information. A
formal advertisement for this post, which will be held at the University
of Bologna in Italy under the supervision of Dr Silvio Peroni, will be
published in the near future. In the mean time, individuals with the
relevant skills and background who would like to express early interest
in joining the OpenCitations team in this role should contact him by
e-mail to \<silvio.peroni@opencitations.net\>.

## Expected Outcomes

By the end of the OpenCitations Enhancement Project, we will have
harvested approximately 190 million citation links obtained from the
reference lists of about 4.4 million scholarly articles (\~15% of Web of
Science's coverage). In this way, in a significant initial step towards
the comprehensive literature coverage we seek for the OCC, we will
establish the OpenCitations Corpus as a valuable and persistent
free-to-use global scholarly on-line Linked Open Data service.

In so doing, we aim at empower the global community by liberating
scholarly citation data from their current commercial shackles,
publishing such data with a Creative Commons CC0 Public Domain
Dedication that will enable novel third-party services to be built over
them.


The OpenCitations Enhancement Project funded by Sloan   The Alfred P. Sloan Foundation, which funds research and education in science, technology, engineering, mathematics and economics, including a number of key technology projects relating to scholarly communication, has agreed to fund
<strong>
 The OpenCitations Enhancement Project
</strong>
, a new project to develop and enhance the OpenCitations Corpus.

Postagens de Rogue Scholar

Tutorial: how to process COCI’s zipped CSV dump without decompressing it

New documents that present OpenCitations’ mission, unique benefits, present status and future plans

The OpenCitations Roadmap is now publicly available on Trello

Reflections on the global citation graph

The Sloan Foundation funds OpenCitations