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. 2022 Aug 31;8:e1032. doi: 10.7717/peerj-cs.1032

Table 5. Search strategy for selected repositories.

Digital library Search query Applied filter
ACM Digital Library [[All: sentiment analysis] OR [All: intent analysis]] AND [[All: machine learning] OR [All: deep learning]] AND [All: Urdu] AND [All: challenges] AND [All: opportunities] Since 2017
IEEE Xplore (Sentiment Analysis OR Sentiment Classification) AND (Machine Learning OR Deep Learning OR Supervised Learning OR Semi Supervised Learning) AND (Urdu OR Urdu language) Since 2017
PLOS ONE Urdu Sentiment Analysis using Machine Learning Since 2017
Google Scholar (Sentiment Analysis OR Opinion Mining OR Intent Analysis OR Sentiment Classification) AND (Machine Learning OR Deep Learning OR Supervised Learning OR Semi Supervised Learning) AND (Urdu OR Urdu language) AND (Challenges) AND (Opportunities) Since 2012 Since 2017
Science Direct (Sentiment Analysis OR Opinion Mining OR Intent Analysis OR Sentiment Classification) AND (Machine Learning OR Deep Learning OR Supervised Learning OR Semi Supervised Learning) AND (Urdu OR Urdu language) AND (Challenges) AND (Opportunities) Since 2017
Springer Link (Sentiment Analysis OR Opinion Mining OR Intent Analysis OR Sentiment Classification) AND (Machine Learning OR Deep Learning OR Supervised Learning OR Semi Supervised Learning) AND (Urdu OR Urdu language) AND (Challenges) AND (Opportunities) Since 2017
Wiley Online Library (Sentiment Analysis OR Opinion Mining OR Intent Analysis OR Sentiment Classification) AND (Machine Learning OR Deep Learning OR Supervised Learning OR Semi Supervised Learning) AND (Urdu OR Urdu language) AND (Challenges) AND (Opportunities) Since 2017
arXiv Urdu Sentiment Analysis using Machine Learning Since 2017
IGI Global Expert search-based keywords: Sentiment Analysis, Urdu, Machine Learning, Deep Learning, Challenges, opportunities  Since 2017
CEEOL Search String keywords: Sentiment Analysis, Urdu, Machine Learning, Deep Learning, Challenges, opportunities  Since 2017