# Automating ArtL@s – extracting data from exhibition catalogues

Simon Gabay, Barbara Topalov, Caroline Corbières, Lucie Rondeau Du Noyer, Béatrice Joyeux-Prunel, Laurent Romary

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Simon Gabay, Barbara Topalov, Caroline Corbières, Lucie Rondeau Du Noyer, Béatrice Joyeux-Prunel, et al.. Automating ArtL@s – extracting data from exhibition catalogues. EADH 2021 - Second International Conference of the European Association for Digital Humanities, Sep 2021, Krasnoyarsk, Russia. hal-03331838

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# Automating ARTL@s - extracting data from
exhibition catalogues

Simon Gabay<fnref n="1" />, Barbara Topalov<fnref n="1" />, Caroline Corbières<fnref n="2" />, Lucie Rondeau du Noyer<fnref n="1" />, Béatrice Joyeux-Prunel<fnref n="1" />, and Laurent Romary<fnref n="3" />

¹université de Genève, prenom.nom@unige.ch

²Université Paris-Saclay (France), prenom.nom@universite-paris-saclay.fr

³INRIA- ALMANACH (France), prenom.nom@inria.fr

## Abstract

Catalogues, which have been published for centuries, are an extremely precious resource for scholars. Using the ArtL@s database as an example, where exhibition catalogues are transformed into a georeferenced database, we question the possibility of an (almost) automatic transformation of pdfs into semantically annotated data. To do so, we present and analyse the graphic organisation of exhibition catalogues, before exploring a possible modeling into TEI (involving possible enhancement of the guidelines).

Databases for art history usually focus on images, and are primarily made by or for museums to display collections (or inventories).<fnref n="1" /> Other databases do not focus on the work of art itself, but on a corpus about the work of art – such as databases used for provenance research<fnref n="2" /> or by collectors monitoring the market<fnref n="3" />. The BASART database of the ARTL@s project<fnref n="4" /> belongs to the second category as it aims at recording exhibitions all over the world since the invention of exhibition catalogues in the 17th century (Paris, Salon de l'Académie, 1673)<fnref n="5" />. BASART is essential for art history, not only because it makes available one of the most widely used sources in the discipline, at a global scale and over several centuries, but also because it makes it possible to globalise the horizons

<footnote n="1">¹http://mandragore.bnf.fr/html/accueil.html</footnote>

<footnote n="2">²For instance http://www.getty.edu/research/tools/provenance/search.html or https://ventesdantiques.inha.fr</footnote>

<footnote n="3">³https://fr.artprice.com/</footnote>

<footnote n="4">⁴https://artlas.huma-num.fr</footnote>

<footnote n="5">⁵According to Guiffrey 1869</footnote>
of research and to move on to unusual quantitative, spatial, and transnational
analyses, without specific knowledge in digital technologies (Joyeux-Prunel and
Marcel 2015).

If data has long been entered manually, by simply copying the content that in
the exhibition catalogues describes the works exhibited, we are now designing
a new workflow, based on GROBID DICTIONARIES technology (Khemakhem
2020), to semi-automate the task, that is to say to retrieve the content from
pdf digitisation of the catalogues, describe it semantically, in order to transform
the XML-TEI output of this new workflow into the structured BASART postGIS
database. As our database is structured to deal with catalogues from very dif-
ferent periods of time, and from very diverse locations and languages, we intend
to take advantage of the tasks involved in designing a semi-automated retrieving
chain – in particular, the description necessary to train recognition algorithms
–, to produce research on the history of the form of exhibition catalogues over
time and space, and according to the language. The project’s ambition is also
to enable broader developments that will be useful for other projects dealing
with comparable resources and corpora – such as auction catalogues, collection
directories, or *catalogues raisonnés*.

# 1 Exhibition catalogues

In order to semantically describe catalogues, we need to analyse their form. This
form has a history, which meets the history of the inventory, whose description
is a challenge for anyone who wishes to model their structure, but also try to
generalise this modeling to any type of similar documents. The *inventorium*
.inventory) can be considered as an early form and the origin of the catalogue.
This list of a set of objects forming a collection was originally built by recording
collection items in the very order in which they were stored or displayed (Bar-
bier, Dubois, and Sordet 2015). That is why in France, as early as the Middle
Ages, inventories were primarily used to associate a given object to the place
where it was preserved. The inventory is first and foremost a practical tool: it is
meant to find and identify an object. Inventories also have a scientific/epistemic
interest insofar as the classification of objects echoes the classifications of the
natural sciences, especially in the case of curiosities cabinets (Findlen 1996).
The practice of classifying allows comparison: "Unlike the inventory, the cata-
logue organises a set of data and arranges them by object, so as to make them
comparable with each other." (Recht 1996, p. 23).

With the advent of printing, and the ability to publish inventories for a
wider audience, the form of the inventory became semi-industrialised for a few
particular types: the *catalogues raisonnés* of an artist’s work, the inventory of
a private collection or a museum, the dealer’s catalogue, the auction catalogue,
the exhibition catalogue. It is with this type of printed data that we believe
we can develop a semi-automated pipeline for content retrieval. This process
begins with the example of exhibition catalogues.

Generally the content of an exhibition catalogue is quite regular : informa-
<figure><img src="image_2.png" /><figcaption>Figure 1: *Catalogue de l'exposition annuelle du musée de Rouen, 1860, p. 19.*</figcaption></figure>

tion about the event exhibition, its title, date, supposed location, its organisers; a list of the exhibitors – first and last name, sometimes completed by biographical detail, a year and place of birth and an address. Most exhibition catalogues complete these lists of artists with a list, for each exhibitor, of the works exhibited (Joyeux-Prunel and Marcel 2015). Whereas this content is not always represented in the same way in the book-catalogue, it is actually organised according to a limited number of possibilities.

## 2 A Stable Layout, Over Time and Place

In the documentation we have gathered (c. 1000 catalogues since the 18th c., mainly from Western countries), the most recurrent format displays the following information: name of the artist (here, highlighted in red), information about the artist (blue) and a list of the works exhibited (yellow) with potentially additional information (green).

### 2.1 Type 1

Salons, yearly municipal exhibitions and academy exhibitions which were held regularly since the 18th century, usually published catalogues with a very stable layout over time:

<figure><img src="image_3.png" /><figcaption>Figure 2: *Catalogue de l'exposition... de Rouen, 1853, p. 4.*</figcaption></figure>

<figure><img src="image_4.png" /><figcaption>Figure 3: *Catalogue de l'exposition... de Rouen, 1862, p. 26.*</figcaption></figure>
This kind of layout can be found throughout the 19th c., whatever the content, at least until the 1940s in most cases. Data is structured the same way in most of the exhibition catalogues that have been printed – no matter the time or the place – over this period of time. It is therefore easy to build a single model for several catalogues. If we look at exhibition catalogues published in Nancy in the 1840's, Paris in the 1920's, Venice in the 1910's or São Paulo in the 1950's, we can observe that they follow a similar pattern, which should facilitate the automation of data extraction.

<figure><img src="image_5.png" /><figcaption>Figure 4: *Catalogue... exposés à Nancy*, 1843, p. 3.</figcaption></figure>

<figure><img src="image_6.png" /><figcaption>Figure 5: *Société des artistes indépendants*, 1921, p. 17.</figcaption></figure>

<figure><img src="image_7.png" /><figcaption>Figure 6: *Esposizione Internazionale... di Venezia*, 1910.</figcaption></figure>

### Francisco BORES (1898—)

25. Composição sôbre fundo rosa — 1945 — 73x60.

26. Natureza morta com garrafa — 1943 — 73x60.

27. Natureza morta com doces — 1946 — 92x73.

<figure><img src="image_8.png" /><figcaption>Figure 8: *Tentoonstelling van schilder- en andere werken...*, 1852, p.12.</figcaption></figure>

## 2.2 Type 2

A secondary structure coexists with the latter one – a structure that first presents the number and the title of the work, followed by the name of its author. The order is relatively opposite to that described above. This second type of layout, following the exhibition order, has been used for the *Exhibition of the Royal Academy* in London since 1780, but it can be found in other countries (e.g. Canada). It has been extremely stable over time too.
<figure><img src="image_9.png" /><figcaption>Figure 9: *The Exhibition of the Royal Academy*, 1785, p. 1.</figcaption></figure>

<figure><img src="image_10.png" /><figcaption>Figure 11: *The Exhibition of the Royal Academy*, 1907, p. 8.</figcaption></figure>

<figure><img src="image_11.png" /><figcaption>Figure 10: *The Exhibition of the Royal Academy*, 1831, p. 6.</figcaption></figure>

<figure><img src="image_12.png" /><figcaption>Figure 12: *The Exhibition of the Royal Academy*, 1975, p. 10.</figcaption></figure>

We assume for the moment that these two types may have corresponded to different areas of cultural influence - on the one hand the influence of the Parisian Salon catalogue model, on the other that of a more Anglo-Saxon model. It is likely that another factor explaining these differences is simply that catalogues by work order assume a more commercial character, where it is the work for sale that is presented, and not the artist. This hypothesis is supported by the presence of Type 2 in many gallery catalogues in the early 20th c.

## 3 Beyond exhibition catalogues

According to the two types presented supra, entries can be grouped under super- entries, which potentially transmit general properties to entries that they include such as the location of the work in the exhibition (gallery 1, red wing...), or more importantly artistic forms (paintings, sculpture, architecture...).

<table><caption>Figure 13: Type 1</caption><thead><tr><th colspan="2">CATALOGUE</th></tr></thead><tbody><tr><td colspan="2">CATEGORY 1</td></tr><tr><td>ARTIST 1</td><td>Work 1.1</td></tr><tr><td>ARTIST 2</td><td>Work 2.1</td></tr><tr><td>ARTIST 3</td><td>Work 3.1</td></tr></tbody></table>

<table><caption>Figure 14: Type 2</caption><thead><tr><th colspan="2">CATALOGUE</th></tr></thead><tbody><tr><td>Work 1</td><td></td></tr><tr><td>Work 2</td><td></td></tr><tr><td>Work 3</td><td></td></tr><tr><td>Work 4</td><td></td></tr><tr><td>Work 5</td><td></td></tr><tr><td>Work 6</td><td></td></tr><tr><td>Work 7</td><td></td></tr><tr><td>Work 8</td><td></td></tr><tr><td>Work 9</td><td></td></tr><tr><td>Work 10</td><td></td></tr><tr><td>Work 11</td><td></td></tr></tbody></table>
These two types can be found in similar documents, the structure of which is very similar to exhibition catalogues: bibliographies (Lindemann, Khemakhem, and Romary 2018), dictionaries (Khemakhem, Herold, and Romary 2018), auction catalogues (Gabay, Rondeau Du Noyer, and Khemakhem 2020), and phone directories (Khemakhem, Brando, et al. 2018).

<figure><img src="image_13.png" /><figcaption>Figure 15: *Annuaire-Almanach de l'industrie*, 1901, p. 2883 compared to the *Catalogue de l'exposition annuelle du musée de Rouen*, 1860, p. 19.</figcaption></figure>

426. Lettre de Cassini (Jacqucs) à M. de Boulogne,
10 mars 1740. Autogr. signé.

427. 13 lignes de la main de Galilée Galilei et signées,
24 août 1601.

428. Lettre de Christian Hüygens, 27 décembre 1694.
Autogr. signé.

BENNIS, rue Saint-Florentin, 13. — Agent de la maison
Longman et Co, de Londres.

BENOIT, rue Saint-Étienne-des-Grès, 2.

BERLANDIER, commissionnaire, rue Dauphine, 26. —
Fournisseur des cabinets de lecture.

<caption>Figure 16: *Catalogue de feu M. de Bruyères Chalabre*, 1833, p. 102</caption>

<caption>Figure 17: *Annuaire des imprimeurs et des libraires*, 1841, p. 135</caption>

Such data has been recently identified as “encyclopedic-like” (Khemakhem, Romary, et al. 2018), i.e. entry-based data for which a dedicated retrieval tool has been developed: GROBID DICTIONARIES (Khemakhem 2020). Thanks to the latter, PDF files are automatically structured and annotated in XML-TEI files, which is used as a pivot format to ease encoding refinements via regexes.

The current TEI guidelines<fnref n="6" /> propose elements allowing research to encode various kinds of lists (`<list>`, `<listPerson>`, `<listPlaces>`, `<listObject>`) and their content (`<item>`, `<person>`, `<place>`, `<object>`). However, some scholars have noted that encoding a catalogue as a “mere list” was not sufficient if some of its entries feature analytical or descriptive content (Nelson 2016). Therefore, following the work on dictionaries with TEI-lex 0 (Romary and Tasovac 2018) on the `<entry>` element, we would like to propose to the TEI Consortium the creation of a `<catalogueEntry>` element. The behaviour of this TEI markup would be similar to `<entry>`, transforming `<form>` and `<sense>` elements into `<catalogueDesc>` and `<catalogueItem>`. A possible encoding would therefore be the one presented *infra*.

The stakes of this type of classification are both to allow a clearer description of the content, and the possibility of spreadsheet-type retrievals, where the

<footnote n="6">⁶https://tei-c.org/guidelines</footnote>
dependencies of a sub-entry on its entry would be maintained (in particular in
the repetition of the entry for each line of the sub-entry in the case of an export
in csv). This type of processing is ideal for a pivot to databases, more easily
handled by users interested in quantitative and cartographic visualisation as is
the case for the Artl@s project.

<figure><img src="image_14.png" /><figcaption>Figure 18: TEI encoding of a catalogue entry.</figcaption></figure>

Data and code

The ODD, the specification and an example can be found at the following address: https://github.com/katabase/Catalogues.
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