Tutorial Addendum On XML Technologies - XSD Syntax

Simple XML Elements with Pre-defined Data Types

    

Simple XML Element: An XML aspect that has no adolescent elements and attributes.

    

Simple XML elements can be authentic in XSD with the afterward statement:

    

 

    
<xsd:element   name  ="element_ name " type="xsd:type_ name "/>

    

where "element_ name " is the name of the XML element, and "type_name" is

    

one of the data blazon names pre-defined in XSD.

    

XSD pre-defined data types are disconnected into 7 groups:

    

    
• Numeric data types


    
• Date and time data types


    
• String data types


    
• Binary data types


    
• Boolean data type


    

Numeric data types: All frequently acclimated accumulation and absolute amount types:

    

    
• xsd:float


    
• xsd:double


    
• xsd:decimal


    
• xsd:integer


    
• xsd:nonPositiveInteger


    
• xsd:nonNegativeInteger


    
• xsd:negativeInteger


    
• xsd:positiveinteger


    
• xsd:long


    
• xsd:int


    
• xsd:short


    
• xsd:byte


    
• xsd:unsignedLong


    
• xsd:unsignedInt


    
• xsd:unsignedShort


    
• xsd:unsignedByte


    

Date and time data types: Date and time accompanying data types. Constants of date and time

    

types are accounting in the architecture authentic by ISO 8601. For example:

    

"2002-12-23T14:19:00.000-05:00" represents an instance of time at 14:19:00.000 on

    

December 23, 2003, with 5:00 time area adjustment.

    

    
• xsd:dateTime - Date and time, like "2002-12-23T14:19:00.000-05:00".


    
• xsd:date - Date only, like "2002-12-23".


    
• xsd:time - Time only, like "14:19:00.000-05:00".


    
• xsd:gDay - Day only, like "--23" (the 23rd day of any ages of any year).


    
• xsd:gMonth - Ages only, like "-12" (December of any year).


    
• xsd:gYear - Year only, like "2002".


    
• xsd:gYearMonth - Year and ages only, like "2002-12".


    
• xsd:gMonthDay - Ages and day only, like "-12-23".


    
• xsd:duration - Aeon of time, like "P0001Y02M03DT04H05M06.000S".


    

String data types: Cord accompanying data types.

    

    
• xsd:string - A arrangement of any Unicode characters


    
• xsd:normalizedString - A cord with no tabs, carrying returns, or band feeds


    
• xsd:token - A normalized cord with no any arch and abaft spaces,
  
      

  and no assorted after spaces.



    

Binary data types:

    

    
• xsd:hexBinary - A arrangement of hex digits to represent any bifold data.


    
• xsd:base64Binary - Bifold data accounting in Base64 encoding


    

Boolean data type:

    

    
• xsd:boolean - With 4 accessible values: 0, 1, true, false.


    

One archetype of using pre-defined XSD data types is in our hello_xsd.xml:

    

 

    
<?xml version="1.0"?>

    
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

    
 <xsd:element name="p" type="xsd:string"/>

    
</xsd:schema>

    

where aspect "p" is authentic to be a simple aspect blazon acceptance adolescent argument node

    

containing data of "xsd:string" type.