Question

Write the components of an XML file in terms of logical structure.

Answer 1

Answer:

• Comparing XML and SGML.
• Comparing HTML and XML.
• Comparing EDI and XML.
• Physical Structure. ...
• Logical Structure. ...
• Well-Formed XML Documents. ...
• Valid XML Document

Answer 2

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Logically, an XML document consists of declarations, elements, comments, character references, and processing instructions, collectively known as the markup. Although throughout this book we refer to an "XML document," it is crucial to understand that XML may not exist as a physical file on disk.