How to create an XMLSCHEMA and XML elements

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• 1. xml references to the schema document 123
• 2. schema document overview 123
• 3. Simple elements, composite elements, and attributes of Schema
• 4. schema Constraints
• 5. schema indicator

Schema series articles

1. xml references to the schema document 123

2. schema document overview 123

3. Simple elements, composite elements, and attributes of Schema

4. schema Constraints

5. schema indicator

The following is a schema written based on the XML file:

 

<? XML version = "1.0" encoding = "ISO-8859-1"?> <Shiporder orderid = "889923" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi: nonamespaceschemalocation = "shiporder. XSD "> <orderperson> john smith </orderperson> <shipto> <Name> OLA Nordmann </Name> <address> langgt 23 </address> <city> 4000 Stavanger </ city> <country> Norway </country> </shipto> <item> <title> empire burlesque </title> <Note> special edition </Note> <quantity> 1 </quantity> <price> 10.90 </price> </item> <title> hide your heart </title> <quantity> 1 </quantity> <price> 9.90 </price> </item> </shiporder>
 

Method 1: General method:

<? XML version = "1.0" encoding = "ISO-8859-1"?> <Xs: schema xmlns: xs = "http://www.w3.org/2001/XMLSchema"> <Xs: element name = "shiporder"> <Xs: complextype> <Xs: sequence> <Xs: element name = "orderperson" type = "XS: string"/> <Xs: element name = "shipto"> <Xs: complextype> <Xs: sequence> <Xs: element name = "name" type = "XS: string"/> <Xs: element name = "Address" type = "XS: string"/> <Xs: element name = "city" type = "XS: string"/> <Xs: element name = "country" type = "XS: string"/> </Xs: sequence> </Xs: complextype> </Xs: Element> <Xs: element name = "item" maxoccurs = "unbounded"> <Xs: complextype> <Xs: sequence> <Xs: element name = "title" type = "XS: string"/> <Xs: element name = "NOTE" type = "XS: string "minoccurs =" 0 "/> <Xs: element name =" quantity "type =" XS: positiveinteger "/> <Xs: element name = "price" type = "XS: decimal"/> </Xs: sequence> </Xs: complextype> </Xs: Element> </Xs: sequence> <Xs: attribute name = "orderid" type = "XS: string" use = "required"/> </Xs: complextype> </Xs: element> </Xs: schema>

 

Method 2: define all elements and attributes, and then use the ref attribute to reference them:

 

<? XML version = "1.0" encoding = "ISO-8859-1"?> <Xs: schema xmlns: xs = "http://www.w3.org/2001/XMLSchema"> <! -- Definition of simple elements --> <Xs: element name = "orderperson" type = "XS: string"/> <Xs: element name = "name" type = "XS: string "/> <Xs: element name =" Address "type =" XS: string "/> <Xs: element name =" city "type =" XS: string "/> <Xs: element name =" country "type =" XS: string "/> <Xs: element name =" title "type =" XS: string "/> <Xs: element name =" NOTE "type =" XS: string "/> <Xs: element name =" quantity "type =" XS: positiveinteger "/> <X S: element name = "price" type = "XS: decimal"/> <! -- Definition of attributes --> <Xs: attribute name = "orderid" type = "XS: string"/> <! -- Definition of complex elements --> <Xs: element name = "shipto"> <Xs: complextype> <Xs: sequence> <Xs: element ref = "name"/> <Xs: Element ref = "Address"/> <Xs: Element ref = "city"/> <Xs: element ref = "country"/> </Xs: sequence> </Xs: complextype> </Xs: Element> <Xs: element name = "item"> <Xs: complextype> <Xs: sequence> <Xs: Element ref = "title"/> <Xs: Element ref = "NOTE" minoccurs = "0"/> <Xs: element ref = "quantity"/> <Xs: Element ref = "price"/> </Xs: sequence> </Xs: complextype> </Xs: Element> <Xs: element name = "shiporder"> <Xs: complextype> <Xs: sequence> <Xs: Element ref = "orderperson"/> <Xs: element ref = "shipto"/> <Xs: Element ref = "item" maxoccurs = "unbounded"/> </Xs: sequence> <Xs: attribute ref = "orderid" use = "required"/> </Xs: complextype> </Xs: Element> </Xs: schema>

Method 3: define the type or type, which allows us to redefine the element. By naming simple type and composite type elements, you can specify their methods in the element type attribute type:

 

 

<? XML version = "1.0" encoding = "ISO-8859-1"?> <Xs: schema xmlns: xs = "http://www.w3.org/2001/XMLSchema"> <Xs: simpletype name = "stringtype"> <Xs: Restriction base = "XS: string"/> </Xs: simpletype> <Xs: simpletype name = "inttype"> <Xs: Restriction base = "XS: positiveinteger"/> </Xs: simpletype> <Xs: simpletype name = "dectype"> <Xs: Restriction base = "XS: decimal"/> </Xs: simpletype> <Xs: simpletype name = "orderidtype"> <Xs: restriction base = "XS: string"> <Xs: Pattern value = "[0-9] {6}"/> </Xs: Restriction> </Xs: simpletype> <Xs: complextype name = "shiptotype"> <Xs: sequence> <Xs: element name = "name" type = "stringtype"/> <Xs: element name = "Address" type = "stringtype"/> <Xs: element name = "city" type = "stringtype"/> <Xs: element name = "country" type = "stringtype"/> </Xs: sequence> </Xs: complextype> <Xs: complextype name = "itemtype"> <Xs: sequence> <Xs: element name = "title" type = "stringtype"/> <Xs: element name = "NOTE" type = "stringtype" minoccurs = "0"/> <Xs: element name = "quantity" type = "inttype"/> <Xs: element name = "price" type = "dectype"/> </Xs: sequence> </Xs: complextype> <Xs: complextype name = "shipordertype"> <Xs: sequence> <Xs: element name = "orderperson" type = "stringtype"/> <Xs: element name = "shipto" type = "shiptotype"/> <Xs: element name = "item" maxoccurs = "unbounded" type = "itemtype"/> </Xs: sequence> <Xs: attribute name = "orderid" type = "orderidtype" use = "required"/> </Xs: complextype> <Xs: element name = "shiporder" type = "shipordertype"/> </Xs: schema>

XSD Elements
XSD Element

Element Element	Explanation Explanation
All	Specifies that the child elements can appear in any order. Each child element can occur 0 or 1 time Indicates that child elements can appear in any order, and each child element appears 0 to 1 time.
Annotation	Specifies the top-level element for schema comments Specifies the highest level of elements for schema annotations.
Any	Enables the author to extend the XML document with elements not specified by the schema Allows the editor to extend the XML file with elements not specified by the schema.
Anyattribute	Enables the author to extend the XML document with attributes not specified by the schema Allows the editor to extend the XML file with attributes not specified by schema.
Appinfo	Specifies information to be used by the application (must go inside annotation) Specified to be appliedProgramInformation used (must be in Annotation)
Attribute	Defines an attribute Define attributes
Attributegroup	Defines an attribute group to be used in Complex Type Definitions Defines an attribute group for composite category definition
Choice	Allows only one of the elements contained in the <choice> declaration to be present within the containing element Only one element in the <choice> declaration can appear in the contained element.
Complexcontent	Defines extensions or restrictions on a complex type that contains mixed content or elements only Define extensions or restrictions on composite types that contain mixed content and elements
Complextype	Defines a complex type element The composite type element is defined)
Documentation	Defines text comments in a schema (must go inside annotation) Defines text comments in Schema (must be in Annotation)
Element	Defines an element Definition Element
Extension	Extends an existing simpletype or complextype Element Extends an existing simple or composite type element.
Field	Specifies an XPATH expression that specifies the value used to define an identity Constraint Specify an XPATH expression to specify the value used to define the identity Constraint
Group	Defines a group of elements to be used in Complex Type Definitions Defines a group of elements that will be used for composite type descriptions
Import	Adds multiple schemas with different target namespace to a document Add multiple Schemas to one file using different target namespaces
Include	Adds multiple schemas with the same target namespace to a document Add multiple Schemas to a file using the same target namespace
Key	Specifies an attribute or element value as a key (unique, non-nullable, and always present) within the containing element in an instance document Specify an attribute or element value in the element contained in the instance document to make them a "key" (special, non-zero, often exists)
Keyref	Specifies that an attribute or element value correspond to those of the specified key or unique element Defines the attribute or element value used to respond to a specified key or special element.
List	Defines a simple type element as a list of values A Value List defines a simple type element
Notation	Describes the format of non-XML data within an XML document Describe the format of non-XML data in XML documents
Redefine	Redefines simple and complex types, groups, and attribute groups from an external Schema Redefinition of simple and composite types, groups, and attribute groups from external Schemas
Restriction	Defines restrictions on a simpletype, simplecontent, or a complexcontent Define constraints on simple types, simple texts, or composite texts
Schema	Defines the root element of a schema Define the root element of the schema
Selector	Specifies an XPATH expression that selects a set of elements for an identity Constraint Specifies the XPath expression that can select a group of nodes for identity constraints.
Sequence	Specifies that the child elements must appear in a sequence. Each child element can occur from 0 to any number of times Indicates that child elements must appear in a certain order. Each sub-element can appear any time
Simplecontent	Contains extensions or restrictions on a text-only complex type or on a simple type as content and contains no elements Contains extensions and constraints of text that are only compound or simple types of text, and does not contain elements.
Simpletype	Defines a simple type and specifies the constraints and information about the values of attributes or text-only elements Defines a simple type and specifies information about attribute values or text-only elements.
Union	Defines a simple type as a collection (union) of values from specified simple data types Defines a simple type from a specified simple data type as a set of values.
Unique	Defines that an element or an attribute value must be unique within the scope Defines that an element or attribute value within the scope must be unique (no duplicates)

 

More references http://www.cnblogs.com/caoxch/archive/2006/11/17/563856.html