## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Authors** & **Year** & **Project** & **OA** & **Reasoning** & **Text Analysis** \\ \hline BioPortal [20] & 2021 & Biomedical ontology catalog & \(\checkmark\) & No & No \\  & 2009 & but IoT ontologies for emotion not found & & & \\ \hline LOV [21] Linked & 2021 & Ontology Catalog & \(\checkmark\) & No & No \\  & & designed by the Semantic Web & & & \\ Open Vocabularies & 2015 & Community & & & \\ \hline [PERSON], [PERSON] et al. & 2018 & Emotion Ontology (EMO) & \(\checkmark\) & No & No \\  & 2011 & MFOEM: Mental health and disease & & \\  & 2011 & ontologies & & \\ Switzerland, Canada & & Taxonomy of emotions & & & \\ \hline [PERSON] et al. [24; 25] & 2018 & Emotion and Mood Ontology & \(\checkmark\) & No & No \\  & 2017 & representing visual cues of emotions & & & \\ \hline [PERSON] et al. [26] based on & 2015 & Emotion and Cognition ontology used to & \(\checkmark\) & \(\checkmark\) owl:Restriction & No \\  & & understand & & \\  & & emotions from Emotiv EEG neuroheadset & & & \\  & & for online learning & & \\ [PERSON] et al. [27] & 2008 & Describing emotions & \(\checkmark\) & No & \(\checkmark\) \\ \hline [PERSON] et al. [28; 29] & 2013 & Emotion Ontology for Context & \(\checkmark\) & \(\checkmark\) Corese, SPARQL, & \(\checkmark\) Camera, heart \\  & & Awareness & & & \\  & & Taxonomy of 6 emotions & & regression & \\ \hline [PERSON] et al. & 2018 & Onyx: Describing emotions on the web of & \(\checkmark\) & No SPIN mentioned & \(\checkmark\) \\
[30] UPM/Spain & 2016 & & & & \\ \hline [PERSON] et al. [31] & 2018 & Survey on 20 ontologies for affective & No & No & No \\  & & states & & \\  & & and their influences & & & \\ \hline [PERSON] et al. [32] & 2018 & EmotiOn ontology for emotion analysis & No & \(\checkmark\) HermiT for & \(\checkmark\) \\  & & based on [PERSON]’s wheel of emotions & & & \\ \hline [PERSON] et al. [33] & 2015 & ECG ontology & \(\checkmark\) & \(\checkmark\) Event-Condition– & \\  & & & Action & \(\checkmark\) ECG \\ \hline [PERSON] et al. [34] & 2015 & Emotion and Mood Awareness for & No & \(\checkmark\) Event-Condition– & \\  & & E-learning & Action & \(\checkmark\) \\  & & (wiki, chat, forum) & & (ECA) rule system & \\ \hline [PERSON] et al. [35] & 2014 & Semantic Human Emotion Ontology (SHEO) for text & No & \(\checkmark\) SWRL rules & \(\checkmark\) \\  & & and images DetectionEmotion: Facial & & for complex & \\  & & complex emotions & & emotions & \\ \hline [PERSON] et al. [36] & 2013 & Emotive ontology for social networks & No & No & \(\checkmark\) \\  & & message analysis (Twitter) & & & \\ \hline [PERSON] et al. [37] & 2012 & Ontology for extracting emotion objects & & & \\  & & from texts (blogs) & No & \(\checkmark\) \\ \hline [PERSON] et al. [38] & 2012 & Emotion ontology for Italian art work & No & \(\checkmark\) Jena Reasoner & \(\checkmark\) \\ \hline [PERSON] et al. [39] & 2012 & Emotion ontology for nonverbal & & \\  & & communication & No & \(\checkmark\) Bayesian & No \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Related work synthesis: Ontology-based emotional projects and reasoning mechanisms employed. Legend: Ontology Availability (OA); when the code is available, the ontologies are classified on the top. Then, the ontology-based projects are classified by year of publications. Several years can appear to highlight that the ontology was maintained from the first publications to the latest publications that we are aware of.