This chapter explores the powerful enhancements in Oracle 23AI for working with JSON and XML data. It introduces advanced capabilities that enable efficient storage, transformation, indexing, and validation of semi-structured data—critical for modern applications. Each feature is presented with practical examples and real-world case studies to highlight its business impact. Implementation steps are provided to help apply these features seamlessly, while internal mechanisms offer insight into how Oracle optimizes performance behind the scenes. Comparisons with earlier versions help underscore the advancements, and FAQs clarify common developer and architect concerns. Every section ends with a concise summary to reinforce key takeaways and practical applications.