This module focuses on the structural components of XML and the foundational use of Document Type Definitions (DTDs). Learners will explore the distinction between different character data types, understand how general and parameter entities enhance reusability, and construct basic DTDs to validate XML document structure. Through practical examples, the module guides learners in creating well-formed XML documents, declaring elements and attributes, and organizing data with clarity and consistency. This module lays the groundwork for developing valid, scalable, and maintainable XML documents in various application contexts.

This module emphasizes practical application through progressively complex XML examples. Learners will explore XML document construction, attribute integration, nesting strategies, and validation patterns. By working through varied sample structures, the module reinforces XML syntax, DTD compliance, and best practices for real-world usage. This hands-on approach helps learners develop fluency in creating well-formed and valid XML documents and prepares them to troubleshoot, structure, and extend XML applications effectively.