Schema Elements
The W3C XML Schema Language defines 42 elements, which naturally divide into several categories:
- One root element
xs:schema
- Three declaration elements
xs:element
,xs:attribute
, andxs:notation
- Eight elements for defining types
xs:complexContent
,xs:complexType
,xs:extension
,xs:list
,xs:restriction
,xs:simpleContent
,xs:simpleType
, andxs:union
- Seven elements for defining content models
xs:all
,xs:any
,xs:anyAttribute
,xs:attributeGroup
,xs:choice
,xs:group
, andxs:sequence
- Five elements for specifying identity constraints
xs:field
,xs:key
,xs:keyref
,xs:selector
, andxs:unique
- Three elements for assembling schemas out of component parts
xs:import
,xs:include
, andxs:redefine
- Twelve facet elements for constraining simple types
xs:enumeration
,xs:fractionDigits
,xs:length
,xs:maxExclusive
,xs:maxInclusive
,xs:maxLength
,xs:minExclusive
,xs:minInclusive
,xs:minLength
,xs:pattern
,xs:totalDigits
, andxs:whiteSpace
- Three elements for documenting schemas
xs:appinfo
,xs:annotation
, andxs:documentation
Elements in this section are arranged alphabetically from
xs:all
to xs:whiteSpace
. Each element begins with a
sample implementation in the following form:
<xs:elementName attribute1 = "allowed attribute values
" attribute2 = "allowed attribute values
" > <!-- Content model --> </xs:elementName>
Most attribute values can be expressed as one of the 44 XML
Schema built-in simple types, such as xs:string
, xs:ID
, or xs:integer
. Values that should be replaced by an instance of the type are italicized. ...
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