| Schemas |
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| • | Schemas are
themselves XML documents. |
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| • | They were
standardized after DTDs and provide |
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| more information
about the document. |
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| • | They have a
number of data types including |
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| string, decimal,
integer, boolean, date, and time. |
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| • | They divide
elements into simple and complex |
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| types. |
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| • | They also
determine the tree structure and how |
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| many children a
node may have. |
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