VirtualMV/XML/Rules
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Extensible Markup Language (XML) | ||
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Overview | Rules | HTML+XML+CSS | XML+HTML | Uses ( RSS ) |
Six golden rules of XML
1. All XML documents begin with
<?xml version="1.0" encoding="…"?>
2. All XML documents must have one(and only one) root element
3. All XML elements must have a closing tag
<p>This is a paragraph</p> <emptytag /> ≈ <emptytag></emptytag>
4. XML tags are case sensitive
<name> and <NAME> are not the same
5. All XML elements must be properly nested
Your <b><i>yuck</b></i> days are over
6. Attribute values must always be quoted
<note date="25 may 2006">…</note>
Well-formed versus Valid
- A "Well Formed" XML document has correct XML syntax
- A "Valid" XML document also conforms to a DTD or XSD
Some features
- Comments
<!-- This is a comment -->
- Adding data that is not to be parsed (e.g. inserting HTML into an XML file
<![CDATA[ no parsing here ]]>
- White space
- Namespaces: Allow you to cope with merging two XML files which have the same tags but for different purposes (e.g. Merging a Staff file with a student file.
- Escape Characters
< < less than > > greater than & & ampersand ' ' apostrophe " " quotation mark
References
virtualMV | Superquick wiki guide | Please give me some feedback |
VirtualMV/XML/Rules. (2024). In WikiEducator/VirtualMV wiki. Retrieved October 10, 2024, from http:https://wikieducator.org/VirtualMV/XML/Rules (zotero)
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