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<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta />
    <article-meta>
      <title-group>
        <article-title>Linking Emotions: Afective and Lexical Resources for Italian in Linked Open Data</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Eliana Di Palma</string-name>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Valerio Basile</string-name>
          <xref ref-type="aff" rid="aff2">2</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Agnese Vardanega</string-name>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Giuliano Gabrieli</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Marco Vassallo</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>CREA Research Centre for Agricultural Policies and Bio-economy</institution>
          ,
          <addr-line>Rome</addr-line>
          ,
          <country country="IT">Italy</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>University of Teramo - Department of Political Sciences</institution>
          ,
          <addr-line>Teramo</addr-line>
          ,
          <country country="IT">Italy</country>
        </aff>
        <aff id="aff2">
          <label>2</label>
          <institution>University of Turin - Computer Science Department</institution>
          ,
          <addr-line>Corso Svizzera 185, 10149 Turin</addr-line>
          ,
          <country country="IT">Italy</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>2025</year>
      </pub-date>
      <volume>0</volume>
      <fpage>0000</fpage>
      <lpage>0001</lpage>
      <abstract>
        <p>The growing interest in analysing emotions in Italian texts has led to the development of various afective resources, often independently constructed and lacking interoperability. To address this fragmentation, we adopt a Linked Open Data (LOD) approach. This paper presents three main contributions: (1) the release of Sentix 3.0, a revised and enriched polarity lexicon for Italian, together with two derivatives (MAL and WMAL) that address morphological and word frequency variation issues; (2) a new quartile-based methodology to discretize continuous polarity scores; and (3) the linking of Sentix 3. 0 and ELIta, an annotated emotion lexicon with categorical labels, to the LiITA Lemma Bank using standard ontologies (OntoLex-Lemon, MARL) and the newly introduced elita ontology for categorical emotion representation based on Plutchik's Wheel. At the heart of the linking is the word, the central node for aligning diferent lexical resources.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;Italian</kwd>
        <kwd>Linguistic Linked Open Data</kwd>
        <kwd>Emotions</kwd>
        <kwd>Sentiment</kwd>
        <kwd>Language Resources</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <sec id="sec-1-1">
        <title>The increasing interest in analyzing emotions from Ital</title>
        <p>ian text has led to many specialized linguistic resources,
such as lexicons and corpora. However, these resources
are often independently built, with varying annotation
methods, severely limiting their interoperability.</p>
        <p>
          To address these challenges, we propose a Linked Open
Data (LOD) approach. Inspired by projects such as LiLa
[
          <xref ref-type="bibr" rid="ref1">1</xref>
          ], our work aims to integrate and formalize two Italian
afective lexical resources, making them interoperable
through linking to the LiITA project’s lemma bank [
          <xref ref-type="bibr" rid="ref2">2</xref>
          ].
        </p>
        <p>This article presents three original contributions:
• Resource linking and ontology development: we
align ELIta, a lexicon annotated with categorical
emotions, and the updated Sentix 3.0 with the
LiITA project’s lemma bank, using the MARL
ontology to formally represent afective
relations. Linking is achieved through the use of</p>
      </sec>
    </sec>
    <sec id="sec-2">
      <title>2. Related Works</title>
      <p>
        port consistent data representation and semantic
integration. To this end, the W3C has introduced foundational
In recent decades, the analysis of emotions has led to the technologies such as RDF and OWL. Building upon these
development of numerous linguistic resources, particu- standards, the MARL ontology has been developed to
larly afective lexicons and annotated datasets. Despite formally describe opinions and to associate them with
the pervasive impact of extensive end-to-end language contextual information(such as opinion topic, features
models (LLMs), afective and other annotated lexicons described in the opinion, etc.).
remain a dynamic area of research within computational This infrastructure underpins the design of
LatinAflinguistics, maintaining its vitality.They are particularly fectus [17], a polarity lexicon originated within the LiLa
efective in the development of hybrid approaches [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ], es- project that adopts a multi-ontology framework for
forpecially suitable for small or domain-specific corpora or mal representation. Specifically, three standards are used:
low-resource languages [
        <xref ref-type="bibr" rid="ref5">5, 6</xref>
        ], where they ensure greater Lemon and Ontolex [18] to describe lexical data, and
efectiveness and interpretability. MARL [19] to encode sentiment information. In this
      </p>
      <p>These lexical resources are designed to be FAIR (Find- schema, the lexicon itself is modeled as an instance of
able, Accessible, Interoperable, Reusable) and transpar- class E31 Document13 from the CIDOC Conceptual
Refent: as every system decision based on a lexicon can erence Model (CRM), an ontology designed to represent
be traced back to specific entries, ensuring interpretabil- entities and relationships in the cultural heritage domain.
ity. Moreover, unlike computationally demanding large In parallel, LatinAfectus is also declared as a lexicon-type
language models, lexicons are accessible to a broader object following the LInguistic MEtadata (lime) module
research community, promoting the democratization of of Ontolex.
research. Lexical entries in the resource are connected to the
lex</p>
      <p>For the Italian language, several lexicons [7, 8] and icon through the lime:entry property and are
instancorpora [9, 10] annotated according to the sentiment tiated as objects of the class ontolex:LexicalEntry.
[11] or emotion associated with the words or texts have Each lexical entry is associated with a label, an
been created and published, created by both automatic ontolex:canonicalForm (linking it to the lemma in
[12, 13] and manual methods [14]. However, much like the LiLa Knowledge Base), and an ontolex:sense,
the broader landscape of digital resources, there is a sig- which captures its meaning. Since LatinAfectus
nificant lack of clear, standardized guidelines for afective is concerned with prior polarity, each lexical entry
resources, resulting in poor interoperability. Each lexi- has only one sense, modeled as an instance of the
con or corpus is typically developed independently, and class ontolex:LexicalSense. This sense is further
although they often share similar objectives, such as sen- described by a label, the relation marl:hasPolarity,
timent analysis or emotion detection, they difer widely and the property marl:polarityValue. The
in terms of annotation categories, selected lemmas, and marl:hasPolarity relation links the sense to a
annotation methodologies. category within marl:Polarity (namely positive,</p>
      <p>In addition, the availability of these resources is highly negative, or neutral) while marl:polarityValue
fragmented. They are typically hosted on disparate plat- assigns a numerical sentiment score from the predefined
forms and, even when co-located within a shared repos- set: 1.0, 0.5, 0.0, -0.5, or -1.0.
itory infrastructure, interoperability between them re- The integration of emotions with Linked Open Data
mains limited or nonexistent. is not a new challenge. Relevant contributions in this</p>
      <p>
        A notable attempt to address these issues can be found area include Iglesias et al. [20] and Sanchez-Rada et al.
in the LiLa project [15], which pioneered a new model [21]. These works introduced Onyx, that is an RDF
onof interoperability for Latin linguistic resources. This tology designed to represent emotions in textual content
vision has since been adopted for Italian by the LiITA within the framework of the Semantic Web and Linked
project [
        <xref ref-type="bibr" rid="ref2">2</xref>
        ]. Both initiatives share an ambitious goal: to Open Data. It builds upon and aligns with standards
build an interconnected system where the lemma acts as such as EmotionML [22], the NLP Interchange Format
the central node linking multiple knowledge bases. The (NIF), and lemon (Lexicon Model for Ontologies) [18],
lemma becomes the foundation for connecting diverse providing a flexible yet structured approach to
annodatabases through the use of shared vocabularies. At tating emotional content. Central to Onyx is the
conthe heart of both projects lies the principle of Linked cept of an EmotionSet, a container for one or more
Open Data [16], enabling integration and reuse across Emotion instances, each representing a specific
emoresources. tional state. These emotions are linked to standardized
      </p>
      <p>Central to the LOD paradigm is the Semantic Web, EmotionCategory resources, which can reflect
diferwhich promotes the use of interoperable and interlink- ent psychological models, and may include numerical
able data schemas for online information. These schemas, values for emotion intensity and afective dimensions
commonly referred to as ontologies or vocabularies, sup- such as arousal and valence. Onyx also enables the
assomarl:hasPolarityValue</p>
      <sec id="sec-2-1">
        <title>Polarity Value</title>
        <p>real number
ciation of emotional annotations with external resources
or entities.</p>
        <p>While Onyx is conceptually rich and expressive, its
structure is relatively complex, as it is designed to
represent the emotional content of texts.</p>
        <p>Opinion
marl:opinion
marl:aggregatedopinion
m
a
r
l
:
h
a
s
P
o
l
a
r
i
t
y</p>
      </sec>
      <sec id="sec-2-2">
        <title>Polarity</title>
        <p>marl:polarity</p>
      </sec>
      <sec id="sec-2-3">
        <title>Neutral</title>
        <p>marl:neutral</p>
      </sec>
      <sec id="sec-2-4">
        <title>Negative</title>
        <p>marl:negative</p>
      </sec>
      <sec id="sec-2-5">
        <title>Positive</title>
        <p>marl:positive
try), modeled as individuals of the Class lila:Lemma2,
which is a subclass of ontolex:Form, originally created
for the LiLa project, and adopted in the LiITA Lemma
Bank accordingly.</p>
        <p>The Lemma Bank was initially populated with
approximately 94, 000 lemmas derived from the online version
of the Nuovo De Mauro dictionary, after excluding about
13, 000 multi-word expressions.</p>
        <sec id="sec-2-5-1">
          <title>LiITA LiITA (Linking Italian) is a Knowledge Base (KB)</title>
          <p>designed to foster interoperability among various Italian
linguistic resources by leveraging the principles of Linked
Open Data (LOD). ELIta ELIta [23], a recently introduced linguistic
re</p>
          <p>The core component of the LiITA KB is its Lemma source, comprises a lexicon annotated via crowdsourcing.
Bank, a comprehensive collection of Italian lemmas. This annotation scheme incorporates both basic
emoThese lemmas, which are conventional lexical citation tions, based on Plutchik’s model [24] with corresponding
forms used across linguistic resources, serve as the cen- association degrees, and the VAD (Valence, Arousal,
Domtral connection point for interlinking both lexical and inance) emotional dimensions, thus including sentiment
textual data. The architecture of the LiITA KB mirrors (valence) [25]. The lexical items, primarily sourced from
that of the LiLa KB for Latin1, operating under the as- the De Mauro dictionary [26], were annotated in
isolasumption that all interoperable (meta)data sources within tion. To date, four distinct versions of this lexicon have
the KB are word-related. been released [8]:</p>
          <p>Following the Linked Data paradigm, LiITA achieves
conceptual interoperability among its distributed re- • RAW: Full annotations with demographic data.
sources by applying vocabularies commonly used within • GOLDEN: Selection of 5 consistent annotations
the Linguistic Linked Open Data (LLOD). For the Lemma + majority-vote golden label.
Bank specifically, this means adopting the vocabulary • INTENSITY: Aggregated intensities from
defined by OntoLex-Lemon [ 18], one of the most widely GOLDEN; includes auto-generated "love" and
used models for representing and publishing lexical re- "neutral".
sources as Linked Data. The Lemma Bank of LiITA is a
collection of canonical forms as intended by the Ontolex- • BINARY: Binary version of INTENSITY using
Lemon ontology (ontolex:canonicalForm property, 0.50 threshold.
the conventionally chosen representation for the entire
set of inflected forms belonging to a particular lexical
en1https://lila-erc.eu/data-page/
2http://lila-erc.eu/ontologies/lila/Lemma</p>
        </sec>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>3. Sentix 3.0 and two derived resources</title>
      <p>richment and update of the TWITA corpus to 2022, it
was decided to harmonize all three resources, which were
developed years apart; this involved not only updating
Sentix is an afective lexicon for the Italian language cre- WMAL’s weights but also rectifying the interconnections
ated in 2013 by aligning several lexical resources, namely among the three to ensure overall consistency. In
particSentiWordNet [27] and MultiWordNet [28] through ular, during the transition from Sentix to MAL, i.e., from
WordNet [29, 30]. lemmas to inflected forms, new identical forms with
dif</p>
      <p>The first version [ 11] was built by transferring the ferent scores and diferent senses are inevitably created.
synset annotations from SentiWordNet to the respective It was decided to manage these in a coordinated manner,
Italian synsets of MultiWordNet, using an automatic map- primarily by revising Sentix.
ping [cf. 31] to resolve the partial alignment of Senti- A key part of this harmonization involved a deeper
WordNet’s indices (based on WordNet 3.0), and those re-examination of the foundational Sentix lexicon. This
of MultiWordNet (based on WordNet 1.6) [cf. 32]. The specific efort, working backwards from the original
Senperformance of the lexicon was evaluated with data man- tix version, led to an expansion in the number of linkable
ually annotated by independent human judges. synsets between SentiWordNet (SWN) and
MultiWord</p>
      <p>The subsequent version, Sentix 2.0, aggregated the po- Net (MWN), which will be made available3.
larity scores of the diferent senses of a lemma into a The revision subsequently involved external resources
single score (-1 to 1), using a weighted average with the and supervised phases to identify forms present in Sentix
sense frequencies calculated on the annotated SemCor that could generate unexpected duplicate entries in MAL
corpus [33, 34]. This version, which includes 41,800 dif- (i.e., entries that could be either base forms or inflected
ferent lemmas, has been available on GitHub in the R forms), and to expand Sentix itself by back-linking
lempackage sentixR since 2019 [35], and has been used in mas present in Morph-it! traceable to pre-existing entries
various research projects over these years. (717 entries). Finally, neutral terms from
SentiWord</p>
      <p>Other lexical resources have been developed from Sen- Net not already present in Sentix were added (22, 117
tix. The first derived lexicon was MAL [ 36], created by entries). The new lexicon ultimately contains 63, 660
expanding Sentix 2.0 with inflected forms derived from lemmas [41].</p>
      <p>Morph-it!, a morphological lexicon for the Italian lan- The resources used for the update were: SentiWordNet
guage [37]. This was intended to address the inherent and MultiWordNet, using the Open Multilingual Wordnet
dificulties of lemmatization in Italian sentiment analysis (https://omwn.org/) [42, 43], the TreeTagger library [44],
- stemming from the language’s morphological complex- and, of course, Morph-it! itself.
ity and the limitations of available NLP tools - which are
particularly exacerbated when analyzing user-generated 4. Methodology
content from social networks (often containing spelling
errors, jargon, irregularities, and non-standard syntactic Following the methodology established for the afective
structures). MAL - which inherits Sentix 2.0’s scores - has lexicon of Latin within the LiLa project, LatinAfectus, the
shown to achieve an improvement in overall sentiment same approach was adopted for the ELIta and Sentix 3.0
analysis performance. lexicons by using the MARL ontology [19] to represent</p>
      <p>
        A second derived resource is WMAL [34], a dictionary polarity properties.
of inflected forms like MAL, where MAL’s scores were In this context, neutrality thresholds for polarity
larecalculated by weighting the original scores inversely bels were defined within the range between the first and
with respect to their words frequencies in the TWITA third quartiles of the lexicon. The weighting
methodolcorpus [38] by using the inversed version of the Zipf scale ogy and polarity calculation based on the new updated
measure [39] that consists in a logarithmic scale based on version of WMAL are key to Sentix 3.0’s polarity
categorthe well-known Zipf law of word frequency distribution ical classification. In this respect, the first and the third
[40]. The two main WMAL lexical and methodological quartile-based interval [1; 3] was calculated on the
speculations were respectively to give more weight to WMAL scores to better individualize the neutral
threshlow frequent terms and to reduce the polarity imbalance olds and consequently the positive and negative
polarwhen using parametric threshold values to assign po- ity values outside. The quartile-based strategy to detect
larity classes: even small variations in these values in neutral scores has already provided promising results
fact showed to have an opposite impact on the ability
to correctly predict negative versus positive polarity [
        <xref ref-type="bibr" rid="ref4">4</xref>
        ]. 3Discrepancies between numerical IDs and verbal labels of numerous
WMAL has achieved better results in polarity
classification, especially for negative messages.
      </p>
      <p>On the occasion of WMAL’s update, driven by the
en</p>
      <p>Italian synsets, due to changes between subsequent versions of
Wordnet [cfr. 32], often prevents their retrieval when attempting to
map from SWN to MWN through standard tools, such as the OMW</p>
      <p>Python package</p>
      <sec id="sec-3-1">
        <title>Anticipation</title>
        <p>elita:Aspettativa</p>
      </sec>
      <sec id="sec-3-2">
        <title>Trust</title>
        <p>elita:Fiducia</p>
      </sec>
      <sec id="sec-3-3">
        <title>Disgust</title>
        <p>elita:Disgusto</p>
      </sec>
      <sec id="sec-3-4">
        <title>Surprise</title>
        <p>elita:Sorpresa</p>
      </sec>
      <sec id="sec-3-5">
        <title>Word</title>
        <p>elita:word
elita:HasEmotion</p>
      </sec>
      <sec id="sec-3-6">
        <title>Emotion</title>
        <p>elita:Emotion</p>
      </sec>
      <sec id="sec-3-7">
        <title>Love</title>
        <p>elita:Amore
Joy
elita:Gioia</p>
      </sec>
      <sec id="sec-3-8">
        <title>Sadness</title>
        <p>elita:Tristezza</p>
      </sec>
      <sec id="sec-3-9">
        <title>Fear</title>
        <p>elita:Paura</p>
      </sec>
      <sec id="sec-3-10">
        <title>Anger</title>
        <p>
          elita:Rabbia
across annotated corpora[
          <xref ref-type="bibr" rid="ref3">3</xref>
          ]. The obtained polarity clas- rates multiple emotion models for text descriptions, elita
sification (Table 1) was used to assign categories within ontology introduces explicit classes and properties for
repmarl:polarity for bot h Sentix 3.0 and ELIta. resenting discrete emotional categories. These categories
are based on Plutchik’s Wheel of Emotions [24], and also
Table 1 include the dyad "Love," formed by the combination of
Polarity classification thresholds based on numerical polarity "Joy" and "Trust".
values. At the core of the ontology is the owl:class defined
Polarity Label Polarity Value Range elita:Emotion, which serves as the general category
for all emotion instances. Specific emotions, such as Gioia
Negative  &lt; − 0.1646 (Joy), are modeled as individuals (instances) of this class.
Neutral − 0.1646 ≤  ≤ 0.1250 To associate a resource, such as a lexical item,
senPositive  &gt; 0.1250 tence, or document, with an emotion, the ontology
deifnes the object property elita:HasEmotion. This
        </p>
        <p>The other relationship used to describe Sentix 3.0 data owl:ObjectProperty links a subject (e.g., a word or
is marl:hasPolaritValue in which values are contin- expression) to an instance of elita:Emotion, thereby
uous from -1 to 1. expressing the emotional content attributed to that
ele</p>
        <p>For example, the lemma in ELIta "abbandonare" ment (Fig. 2).
was annotated as marl:hasPolarity "Negative", and Despite its simplicity, the ontology maintains
conmarl:hasPolarityValue "− 0.833". ceptual continuity with Onyx through the use of the</p>
        <p>However, since the MARL ontology does not provide elita:HasEmotion property, which functionally
corspecific properties for representing categorical emotions, responds to onyx:hasEmotionCategory. Moreover,
and the structure of Onyx is relatively complex, the elita the emotional categories defined in elita reflect the
anontology is introduced to fill this gap with a simpler and notations present in the ELIta lexical resource, ensuring
more transparent model, specifically designed for anno- alignment with existing linguistic data.
tating individual words with emotion categories. This design enables the annotation and querying of</p>
        <p>The elita ontology has been developed to represent resources using fine-grained emotional categories,
efeccategorical emotions in a structured and interoperable tively complementing polarity-based approaches in the
manner, with a particular focus on applications in lin- representation of lexical entries. At the same time, it
guistic and sentiment analysis. In contrast to the MARL ensures interoperability with existing emotion
ontoloontology, which primarily addresses sentiment polarity gies while providing a lightweight, application-oriented
(positive, neutral, negative), and Onyx, which incorpo- model specifically tailored to lexical annotation.</p>
      </sec>
    </sec>
    <sec id="sec-4">
      <title>5. Linking</title>
      <sec id="sec-4-1">
        <title>After selecting the ontologies for the Linked Open Data</title>
        <p>representation of the lexical resources, the lexicons were
converted into RDF format. The linking procedure
involved mapping lexical entries, each associated with a
unique URI, to their corresponding lemmas within the
LiITA’s Lemma Bank. The results of this linking process
are presented in the following sections (an example of a
linked entry is shown in Figure 3).
5.1. Linking ELIta
processing.</p>
        <p>The lexical entries that presented a one-to-one
match were associated with the lemmas in the Lemma
Bank using the Ontolex ontology and the relation
ontolex:CanonicalForm.</p>
        <p>60</p>
        <p>Linking Results − ELIta and the LiITA Lemma Bank</p>
        <p>70%
)
%
(40
e
g
a
t
cneeP
r
20</p>
      </sec>
      <sec id="sec-4-2">
        <title>The ELIta lexical resource comprises 6, 905 entries, en</title>
        <p>compassing lemmas (as defined by LiITA), emojis, and
multi-word expressions like "a malincuore" (reluctantly).</p>
        <p>Notably, ELIta’s lexical entries include in some cases 0 2.8%
both masculine and feminine forms of adjectives and one to one one to many none
nouns. This inclusion aimed to facilitate the assessment
of gender-based perceptual diferences, particularly when Figure 4: Percentages of linking between ELIta and LiITA
morphological gender is the sole distinguishing factor. Lemma Bank.</p>
        <p>To align ELIta with LiITA’s Lemma Bank, emojis were
initially removed. The remaining lexical entries were The high percentage of matches between ELIta and
then compared and linked to LiITA’s lemma URI where LiITA (shown in Fig. 4) is mainly due to the use of the
feasible. This process yielded 4, 705 ELIta words that ex- same lexical source as the backbone of both resources.
hibited a one-to-one match with lemmas or hypolemmas In particular, both rely heavily on the Nuovo De Mauro
in LiITA (as shown in Table 2). The remaining approxi- dictionary: about 70 percent of ELIta’s entries come from
mately 2, 000 entries, however, matched multiple lemmas the Nuovo Vocabolario di Base [26], while LiITA’s Lemma
within the lemma bank, or none, necessitating further Bank is based on the lexical base of an online version of
27.1%</p>
      </sec>
    </sec>
    <sec id="sec-5">
      <title>6. Query</title>
      <p>the dictionary Nuovo De Mauro4. The 190 lexical entries
in ELIta that do not have a match in LiITA are mainly
multi-word expressions or idiomatic phrases, which were
not included in the construction of the LiITA lemma bank.</p>
      <p>In addition, some entries without correspondence
correspond to feminine forms that were explicitly annotated
in ELIta. These forms often carry diferent afective
annotations than their male counterparts, which are usually
used as the canonical form of the lemma in LiITA.
Consequently, these female variants were not included in the
linking process.</p>
      <p>One-to-many correspondences, accounting for 27.1
percent of the total, are largely attributable to words that
correspond to multiple parts of speech (PoS) in LiITA,
and thus correspond to multiple lemmas. In ELIta, the
annotation process, following the methodology described
in [14], did not specify the part of speech for each entry.
As a result, PoS-based disambiguation is not possible in
the current version of the resource.
4https://dizionario.internazionale.it/</p>
      <sec id="sec-5-1">
        <title>One of the cardinal principles of Linked Open Data as</title>
        <p>5.2. Linking Sentix 3.0 mentioned above is also the use of standards such as RDF
and SPARQL to provide useful information on what is
The same procedure was applied to Sentix 3.0, with each identified by a URI, for the purpose of (meta)data
repentry linked to a lemma from the lemma bank whenever resentation and retrieval. If RDF (Resource Description
possible. The results revealed that most entries were new Framework) [45] is the data model underlying the
Seto the lemma bank and therefore had no matching lemma. mantic Web, SPARQL5 is a query language for (meta)data
This is primarily because the lexicon contains a large represented in RDF.
number of multi-word expressions, such as "oggetti per Integrating afective resources into LiITA significantly
la casa" (household items), "vedova nera" (black widow), enhances its query capabilities, allowing for advanced
"dificoltà di apprendimento" (learning dificulties). As in SPARQL interrogations across LiITA’s own data and its
the case of ELIta, the one-to-many links are due to the linked lexical and textual resources.
presence of lemmas in Sentix that may belong to diferent For instance, it is possible to6:
parts of speech in LiITA Lemma Bank. To address the
one-to-many mappings, a possible solution would be to Query 1. Retrieve the Distribution of Emotions in
disambiguate entries based on part of speech. However, ELIta It’s possible to query the distribution of emotions
the current version of Sentix consists of isolated lexical as defined within the ELIta lexicon. the SPARQL query
entries, and PoS tagging typically relies on contextual counts the number of lemmas associated with each
emoinformation. Since such context is not available in the tion label in the ELIta resource. By linking lemmas from
lexicon, it is not currently possible to assign PoS labels the LiITA Lemma Bank to their corresponding emotion
reliably. While previous versions of Sentix included some annotations in ELIta, the query retrieves the textual label
PoS information, this is not present in the current release. of each emotion and aggregates the lemmas accordingly.
As a result, any attempt at disambiguating part of speech The results are grouped by emotion label and sorted in
would be arbitrary. descending order based on lemma count.</p>
        <p>Nevertheless, successful linking was achieved in 36%
(as shown in Fig. 5) of cases, with 22,946 lemmas matched
on a one-to-one basis (see Table 3).
5https://www.w3.org/TR/rdf-sparql-query/
6The SPARQL queries used to generate these examples are available
in the appendix and can be executed via the LiITA endpoint.</p>
        <p>Table 4 shows the result of such distribution, with
"Aspettativa" (Anticipation) being the most frequent
emotion.
Query 2. Retrieve Polarity Distribution in Sentix
3.0: The SPARQL query counts the number of lemmas
associated with each polarity label (e.g., "Positive",
"Negative", "Neutral") in the Sentix 3.0 resource. By linking
lemmas from the LiITA Lemma Bank to their
corresponding polarity annotations in Sentix 3.0, the query retrieves
the textual label of each polarity and aggregates the
lemmas accordingly. The results are grouped by polarity and
sorted in descending order based on lemma count.</p>
        <p>This query type helps determine the count of Italian
words marked as positive, negative, or neutral based on
lemmas shared between Sentix 3.0 and LiITA. Table 5
provides the result, indicating a higher number of neutral
lemmas.
Query 3. Return the average Sentix polarity score
for each emotion annotated in ELIta: Another
possible query can be used to identify the most negative
emotion in ELIta based on Sentix 3.0 Polarity Value.</p>
        <p>The query retrieves the average Sentix polarity value
for each emotion label found in the ELIta resource. It
does so by:
1. Linking lemmas from LiITA (via lila:lemma) to</p>
        <p>their associated emotions in ELIta.
2. Retrieving corresponding polarity values from</p>
        <p>Sentix.</p>
        <p>Amore (Love)
Gioia (Joy)</p>
        <p>Fiducia (Trust)
Aspet ativa (Anticipation)
n
o
ito Sorpresa (Surprise)
m
E</p>
        <p>Paura (Fear)
Tristezza (Sadness)</p>
        <p>Rabbia (Anger)
Disgusto (Disgust)</p>
        <p>Polarity
0.2
0.0
−0.2</p>
      </sec>
      <sec id="sec-5-2">
        <title>The results indicate that Disgust, rather than Sadness,</title>
        <p>consistently emerges as the most negative emotion when
analyzing average polarity scores for emotions based on
Sentix 3.0 annotations. This is visualized in Figure 6,
where the color gradient reflects polarity intensity.</p>
        <p>Average Polarity per Emotion</p>
        <p>Negative</p>
        <p>Neutral</p>
        <p>Positive
−0.4
−0.2 Average Polarity (Sentix)
0.0
0.2
Query 4. Determine the polarity of lemmas
annotated with contrasting emotions: Since words in
ELIta can be associated with multiple emotions, we
explored instances where Joy and Sadness, two emotions
of opposing polarities, co-occurred in the annotation of
the same lemma.</p>
        <p>As a first step, we queried the number of words in
ELIta that are simultaneously associated with both Joy
and Sadness, grouped by their Sentix polarity label.</p>
        <p>More specifically, the query:
1. Selects lemmas from the LiITA Lemma Bank that
are linked to ELIta entries.
2. Filters for those lemmas tagged simultaneously
with the emotions elita:Gioia (Joy) and
elita:Tristezza (Sadness).
3. Matches these lemmas to their corresponding
Sentix 3.0 polarity labels (Positive, Negative, or
Neutral).
4. Counts how many lemmas fall into each polarity
category.</p>
        <p>5. Sorts the output by descending frequency.</p>
      </sec>
      <sec id="sec-5-3">
        <title>We found that in most instances the simultaneous presence of Joy and Sadness corresponded to a neutral polarity. The second most common polarity observed was positive (as shown in Table 6).</title>
      </sec>
      <sec id="sec-5-4">
        <title>Interestingly, only two words, "invocare" (to invoke)</title>
        <p>and "umore" (mood), identified through a dedicated
query7, consistently exhibited a negative polarity
according to Sentix 3.0. Their respective polarity values are
shown in Table 7.</p>
        <p>The examples showcased a range of queries that
extract information not only from individual resources but
also by integrating data from both Sentix 3.0 and ELIta,
highlighting how interoperability enables more
comprehensive analysis of afective lexical information.</p>
      </sec>
    </sec>
    <sec id="sec-6">
      <title>7. Conclusions and Future Works</title>
      <sec id="sec-6-1">
        <title>This paper introduces, for the first time in Italian, two</title>
        <p>afective lexical resources, Sentix 3.0 and ELIta, published
according to the Linked Open Data (LOD) paradigm. It
also presents the new version of the Sentix 3.0 resource
and its derivatives, MAL and WMAL, now available on
GitHub. Additionally, the ontology developed for
rendering the ELIta emotional lexicon within the Linguistic
Linked Open Data (LLOD) framework is introduced.</p>
        <p>Both resources have been linked to the LiITA Lemma
Bank, thus contributing to and enriching the possibilities
of investigation and promoting interoperability among
LLOD resources.</p>
        <p>Through the LOD paradigm, these resources also
support interdisciplinary applications, particularly within
the digital humanities (e.g., cultural heritage, social
sciences), where linguistic knowledge graphs find practical
applications (e.g., through frameworks like CIDOC CRM
or LiLa).</p>
        <p>Nonetheless, this work represents only the initial
phase of fully aligning these afective resources with
LiITA. Future eforts will focus on resolving one-to-many
mappings and incorporating new lemmas into the LiITA
Lemma Bank where applicable.
7The corresponding query is provided in the appendix.</p>
      </sec>
      <sec id="sec-6-2">
        <title>Further challenges, such as the emotion analysis of lit</title>
        <p>erary texts or interlingual evaluations between regional
variants of Italian, can be addressed through
interoperability in an ecosystem where the word is the basis of
knowledge.</p>
      </sec>
    </sec>
    <sec id="sec-7">
      <title>Acknowledgments</title>
      <sec id="sec-7-1">
        <title>This contribution is funded by the European Union</title>
        <p>— Next Generation EU, Mission 4 Component 1 CUP
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Interlinking Linguistic Resources for Italian via Linked Data.
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in: F. Dell’Orletta, J. Monti, F. Tamburini (Eds.),
Proceedings of the Seventh Italian Conference on
Computational Linguistics CLiC-it 2020 : Bologna, Appendix
Italy, March 1-3, 2021, Collana Dell’Associazione
Italiana Di Linguistica Computazionale, Accademia This appendix reports the SPARQL Queries illustrated in
University Press, Torino, 2020, pp. 457–463. doi:10. 6.</p>
        <p>4000/books.aaccademia.8964.
[35] V. Basile, Valeriobasile/sentixR, 2019-2024. Query 1
[36] M. Vassallo, G. Gabrieli, V. Basile, C. Bosco, The
tenuousness of lemmatization in lexicon-based sen- Retrieve the distribution of emotions:
timent analysis, in: Proceedings of the Sixth Italian
Conference on Computational Linguistics, volume
2481, Ceur, 2019, pp. 1–6. PREFIX l i l a : &lt; h t t p : / / l i l a − e r c . eu /
[37] E. Zanchetta, M. Baroni, Morph-it! A free corpus- o n t o l o g i e s / l i l a / &gt;
based morphological resource for the Italian lan- PREFIX e l i t a : &lt; h t t p : / / w3id . o r g / e l i t a
guage, in: Proceedings of Corpus Linguistics Con- / &gt;
ference Series 2005 (ISSN 1747-9398), volume 1, Uni- PREFIX o n t o l e x : &lt; h t t p : / / www. w3 . o r g / ns
versity of Birmingham, 2005, pp. 1–12. / lemon / o n t o l e x #&gt;
[38] V. Basile, M. Lai, M. Sanguinetti, Long-term social PREFIX r d f s : &lt; h t t p : / / www. w3 . o r g
media data collection at the university of turin, in: / 2 0 0 0 / 0 1 / r d f − schema #&gt;
Proceedings of the Fifth Italian Conference on
Computational Linguistics (CLiC-it 2018), Torino, Italy, SELECT ? e m o t i o n L a b e l (COUNT ( ∗ ) as ?
December 10-12, 2018., 2018. URL: http://ceur-ws. count )
org/Vol-2253/paper48.pdf. WHERE {
[39] W. J. B. van Heuven, P. Mandera, E. Keuleers, ? lemma a l i l a : Lemma .</p>
        <p>M. Brysbaert, Subtlex-uk: A new and im- ? e l i t a L e m m a o n t o l e x : c a n o n i c a l F o r m
proved word frequency database for british en- ? lemma .
glish, Quarterly Journal of Experimental Psy- ? e l i t a L e m m a e l i t a : HasEmotion ?
chology 67 (2014) 1176–1190. URL: http://dx.doi. e m o t i o n .
org/10.1080/17470218.2013.850521. doi:10.1080/ ? e m o t i o n r d f s : l a b e l ? e m o t i o n L a b e l
17470218.2013.850521. }
[40] G. K. Zipf, Human Behaviour and the Principle of GROUP BY ? e m o t i o n L a b e l</p>
        <p>Least Efort: an Introduction to Human Ecology, ORDER BY DESC ( ? count )</p>
        <p>Addison-Wesley, 1949.</p>
        <p>Query 2</p>
      </sec>
      <sec id="sec-7-2">
        <title>Return the distribution of polarity:</title>
        <p>PREFIX l i l a : &lt; h t t p : / / l i l a − e r c . eu /
o n t o l o g i e s / l i l a / &gt;
PREFIX marl : &lt; h t t p : / / www. g s i . upm . e s /
o n t o l o g i e s / marl / ns #&gt;
PREFIX o n t o l e x : &lt; h t t p : / / www. w3 . org / ns
/ lemon / o n t o l e x #&gt;
PREFIX r d f s : &lt; h t t p : / / www. w3 . org
/ 2 0 0 0 / 0 1 / r d f −schema #&gt;
SELECT ? p o l a r i t y L a b e l (COUNT ( ∗ ) as ?
count )
WHERE {
? lemma a l i l a : Lemma .
? sentixLemma o n t o l e x :</p>
        <p>c a n o n i c a l F o r m ? lemma .
? sentixLemma marl : h a s P o l a r i t y ?
p o l a r i t y .
? p o l a r i t y r d f s : l a b e l ?</p>
        <p>p o l a r i t y L a b e l
}
GROUP BY ? p o l a r i t y L a b e l
ORDER BY DESC ( ? count )
Query 3</p>
      </sec>
      <sec id="sec-7-3">
        <title>Return the average Sentix polarity score for each emotion annotated in ELIta: PREFIX l i l a : &lt; h t t p : / / l i l a − e r c . eu / o n t o l o g i e s / l i l a / &gt;</title>
        <p>PREFIX e l i t a : &lt; h t t p : / / w3id . org / e l i t a
/ &gt;
PREFIX o n t o l e x : &lt; h t t p : / / www. w3 . org / ns
/ lemon / o n t o l e x #&gt;
PREFIX r d f s : &lt; h t t p : / / www. w3 . org
/ 2 0 0 0 / 0 1 / r d f −schema #&gt;
PREFIX marl : &lt; h t t p : / / www. g s i . upm . e s /
o n t o l o g i e s / marl / ns #&gt;
PREFIX xsd : &lt; h t t p : / / www. w3 . org / 2 0 0 1 /</p>
        <p>XMLSchema#&gt;</p>
      </sec>
      <sec id="sec-7-4">
        <title>SELECT ? e m o t i o n L a b e l (AVG( ? p o l a r i t y V a l u e ) AS ? a v g P o l a r i t y )</title>
        <p>WHERE {
? lemma a l i l a : Lemma .
? elitaLemma o n t o l e x : c a n o n i c a l F o r m ?
lemma .
? elitaLemma e l i t a : HasEmotion ?
emotion .
? sentixLemma o n t o l e x : c a n o n i c a l F o r m
? lemma .
? sentixLemma marl : h a s P o l a r i t y V a l u e
? p o l a r i t y V a l u e .</p>
        <p>? emotion r d f s : l a b e l ? e m o t i o n L a b e l .
}
GROUP BY ? e m o t i o n L a b e l
ORDER BY ASC ( ? a v g P o l a r i t y )
Query 4</p>
      </sec>
      <sec id="sec-7-5">
        <title>Determine the polarity of lemmas annotated with contrasting emotions (Joy and Sadness): PREFIX l i l a : &lt; h t t p : / / l i l a − e r c . eu / o n t o l o g i e s / l i l a / &gt;</title>
        <p>SELECT ? l a b e l ? value
WHERE {
? lemma a l i l a : Lemma .
? elitaLemma o n t o l e x : c a n o n i c a l F o r m</p>
        <p>? lemma .
? elitaLemma e l i t a : HasEmotion</p>
        <p>e l i t a : G i o i a .
? elitaLemma e l i t a : HasEmotion</p>
        <p>e l i t a : T r i s t e z z a .
? sentixLemma o n t o l e x :</p>
        <p>c a n o n i c a l F o r m ? lemma .
? sentixLemma marl : h a s P o l a r i t y ?</p>
        <p>p o l a r i t y .
? sentixLemma marl :</p>
        <p>h a s P o l a r i t y V a l u e ? value .
? elitaLemma r d f s : l a b e l ? l a b e l .
? p o l a r i t y r d f s : l a b e l " N e g a t i v e "</p>
        <p>@en .
Declaration on Generative AI
During the preparation of this work, the author(s) used ChatGPT (OpenAI), Grammarly, and DeepL
Write / DeepL Translate in order to: Text translation, Paraphrase and reword, and Grammar and
spelling check. After using these tool(s)/service(s), the author(s) reviewed and edited the content as
needed and take(s) full responsibility for the publication’s content.</p>
      </sec>
    </sec>
  </body>
  <back>
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