Natural Language Processing (NLP) with Applications and Natural Language Understanding (NLU), 2nd Edition

Dear Colleagues,

This is the 2nd Edition of the Special Issue “Natural Language Processing (NLP) with Applications and Natural Language Understanding (NLU)” (https://www.mdpi.com/journal/information/special_issues/ALNGLE7U2B). NLP is both a technology and a science, a branch of both computational linguistics and artificial intelligence. The current hyper regarding LLM has reached new heights thanks to CHATGPT and its attractive applications: how will this influence NLP, and is NLP still needed, possibly in a different form? This Special Issue will bring together researchers in all areas of NLP to discuss applications and future research directions in the field of natural language understanding for DNNs.

NLP applications are all based on the same source of knowledge, i.e., words, as even visual neural networks need words for their captions. LLM vocabularies are usually made up of the first most frequent 50,000 words or types extracted from billions of tokens, but they still produce hallucinations and biases. Part of the problem at the heart of DNN use is their lack of generalization and their inherent inability to understand what they are processing.

In this Special Issue, we will feature papers on all kinds of language-oriented applications, starting with speech recognition and synthesis, machine translation, and question answering. Below is a provisional list of the most relevant topics:

• Sentiment Analysis from Social Media;
• Chatbots and Smart Assistants;
• Email Filters;
• Text Summarization;
• Customer Support and Analytics for Market Intelligence;
• Online Search Engine and Autocomplete;
• Recruitment and Hiring;
• Auto-Correct and Next-Word Prediction;
• Spell and Grammar Checking;
• Text Extraction and Classification;
• Image and Facial Recognition for/from Captions;
• NLP for Multimedia Self-Learning Language Tools.

Traditionally, NLP techniques have varied from symbolic to statistical approaches but have always addressed linguistic content that may be constituted by phonemes or phones, morphemes or sequences of subword units, and tokens of various types and lengths, including punctuation, words, multiwords, or polywords, syntactic constituents, and dependency structures. These low-level strata make up what is currently addressed directly or indirectly by the majority of applications.

Attempts are being made to address text understanding, which belongs to higher levels of linguistic knowledge: pronominal binding, coreference resolution, quantifier raising, semantic representation in terms of AMRs, or other similar theories completed by word-sense disambiguation. Not all of these tasks are suited to current transformer-based LLMs, but they could be carried out by NLP components. Finally, we assume that, to attain reasoning that includes causal inference from knowledge of the world, lower linguistic strata should not be erased but used as a trigger for further processing. Thus, we will dedicate a separate subsection of this Special Issue to these latter topics, which may be dubbed as NLP for future applications with AI for text understanding or NLU, promoting project presentation and works in progress.

In sum, in this Special Issue, we will bring together researchers by discussing innovative applications in all fields of NLP, alongside innovative results for semantic processing for NLU.

Prof. Dr. Rodolfo Delmonte
Guest Editor

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• natural language processing in current applications
• natural language understanding for future applications
• question answering
• sentiment analysis from social media
• chatbots and smart assistants
• email filters
• text summarization
• customer support and analytics for market intelligence
• online search engine and autocomplete
• auto-correct and next-word prediction
• spell and grammar checking
• text extraction and classification
• image and facial recognition for/from captions
• NLP for multimedia self-learning language tools