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XML Tutorial

XML HOME XML Introduction XML How to use XML Tree XML Syntax XML Elements XML Attributes XML Namespaces XML Display XML HttpRequest XML Parser XML DOM XML XPath XML XSLT XML XQuery XML XLink XML Validator XML DTD XML Schema XML Server XML Examples XML Quiz XML Certificate

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XML DOM

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XSLT Tutorial

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XML DTD

DTD Introduction DTD Building Blocks DTD Elements DTD Attributes DTD Elements vs Attr DTD Entities DTD Examples

XSD Schema

XSD Introduction XSD How To XSD <schema> XSD Elements XSD Attributes XSD Restrictions

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References

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XSD String Data Types

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String data types are used for values that contains character strings.

String Data Type

The string data type can contain characters, line feeds, carriage returns, and tab characters.

The following is an example of a string declaration in a schema:

<xs:element name="customer" type="xs:string"/>

An element in your document might look like this:

<customer>John Smith</customer>

Or it might look like this:

<customer>       John Smith     </customer>

Note: The XML processor will not modify the value if you use the string data type.

NormalizedString Data Type

The normalizedString data type is derived from the String data type.

The normalizedString data type also contains characters, but the XML processor will remove line feeds, carriage returns, and tab characters.

The following is an example of a normalizedString declaration in a schema:

<xs:element name="customer" type="xs:normalizedString"/>

An element in your document might look like this:

<customer>John Smith</customer>

Or it might look like this:

<customer>     John Smith     </customer>

Note: In the example above the XML processor will replace the tabs with spaces.

Token Data Type

The token data type is also derived from the String data type.

The token data type also contains characters, but the XML processor will remove line feeds, carriage returns, tabs, leading and trailing spaces, and multiple spaces.

The following is an example of a token declaration in a schema:

<xs:element name="customer" type="xs:token"/>

An element in your document might look like this:

<customer>John Smith</customer>

Or it might look like this:

<customer>     John Smith     </customer>

Note: In the example above the XML processor will remove the tabs.

String Data Types

Note that all of the data types below derive from the String data type (except for string itself)!

Name Description
ENTITIES  
ENTITY  
ID A string that represents the ID attribute in XML (only used with schema attributes)
IDREF A string that represents the IDREF attribute in XML (only used with schema attributes)
IDREFS  
language A string that contains a valid language id
Name A string that contains a valid XML name
NCName  
NMTOKEN A string that represents the NMTOKEN attribute in XML (only used with schema attributes)
NMTOKENS  
normalizedString A string that does not contain line feeds, carriage returns, or tabs
QName  
string A string
token A string that does not contain line feeds, carriage returns, tabs, leading or trailing spaces, or multiple spaces

Restrictions on String Data Types

Restrictions that can be used with String data types:

  • enumeration
  • length
  • maxLength
  • minLength
  • pattern (NMTOKENS, IDREFS, and ENTITIES cannot use this constraint)
  • whiteSpace

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