About XML fundamentals: which statement is NOT true about XML as a data representation and transformation technology?

Introduction / Context:
XML is a metalanguage for representing structured information. It supports validation, transformation, and interchange across domains. This question asks you to spot the statement that mischaracterizes XML’s purpose and capabilities.

Given Data / Assumptions:

• XML focuses on data structure and meaning, not presentation.
• Transformations (e.g., via XSLT) are typically used to create display formats.
• XML documents usually include prolog and root element content.

Concept / Approach:
XML’s core strength is separating data structure/content from presentation. It is widely used for configuration, messaging, interop, and archival, not just web display. Thus any claim that web display is XML’s “most important” application is misleading.

Step-by-Step Solution:

Verification / Alternative check:
Consider popular uses: web services, office document formats, configuration files, and data exchange—these eclipse direct page display.

Why Other Options Are Wrong (they are true or acceptable):

• Separation of content/structure/materialization is a key XML design goal.
• XML is more expressive than HTML for data (it is extensible and domain-neutral).
• Typical XML documents consist of a prolog and a document element (two broad sections conceptually).

Common Pitfalls:
Confusing XML (data) with HTML (presentation). XML itself does not define appearance; tools like XSLT or CSS handle that.

Final Answer:
Web page display is the most important application of XML.