XML
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This document outlines the basic rules and structure of XML including: 1) All XML elements must have a closing tag and be properly nested. 2) XML documents must have a single root element and attribute values must be quoted. 3) Special characters like < and & need to be written as entity references like < and & for XML to be valid.
XML
- 1. XML STRUCTURE SARASWATHI RAMALINGAM SRI AKILANDESWARI WOMENS COLLEGE
- 2. XML STRUCTURE • All XML Elements Must Have a Closing Tag • XML requires all tags to be closed <markup>This is not valid XML <markup>Since there is no closing tag
- 3. XML STRUCTURE • XML Tags Are Case Sensitive • <Markup>These two tags are very different</markup>
- 4. XML STRUCTURE • All XML Elements Must Have Proper Nesting <oxygen><nitrogen>These tags are improperly nested</oxygen></nitrogen>
- 5. XML STRUCTURE • All XML Documents Must Contain a Single Root Element <?xml version=”1.0”?> <Father> <Son> <Daughter> </Daughter> </Son> </Father> <Mother> <Son> <Daughter> </Daughter> </Son>
- 6. XML STRUCTURE • Attribute Values Must Be Quoted <?xml version=1.0?> <shirt> <price currency=USD>14.99</price> </shirt>
- 7. XML STRUCTURE • Attributes May Only Appear Once in the Same Start Tag <shirt size=”large” size=”small”>Zippy Tee</shirt>
- 8. XML STRUCTURE • Entity References • <message>salary < 1000</message> • To avoid this error, replace the "<" character with an entity reference: • <message>salary < 1000</message >
- 9. XML STRUCTURE < < less than > > greater than & & ampersand ' ' apostrophe " " quotation mark
- 10. XML STRUCTURE • Comments in XML • <!-- This is a comment -->