Description: Training data transparency refers to the clarity and accessibility of information about the data used to train artificial intelligence (AI) models. This concept is fundamental in the realm of explainable AI, as it allows researchers, developers, and users to understand how models behave and why they make certain decisions. Transparency involves not only disclosing data sources but also the quality, diversity, and representativeness of these data. By providing detailed information about training data, it facilitates the identification of biases, errors, and limitations in models, which in turn promotes trust and accountability in their use. Data transparency is also crucial for complying with regulations and ethical standards, as it enables stakeholders to assess the social and ethical impact of AI applications. In an era where AI is increasingly integrated into critical decisions across various sectors, from healthcare to criminal justice, clarity about training data becomes an essential pillar to ensure that these systems are fair, equitable, and understandable.