XML Schema sequence element

Definition and Usage

sequence element requires group element to specify the order they appear in the containing element. Each child element can occur zero to any number of times.

Element Information

Parent element: group, choice, sequence, complexType , restriction (both simpleContent and complexContent), extension (both simpleContent and complexContent)

grammar

(? Statement element in the sequence element can occur zero or one time.)

属性	描述
id	可选。规定该元素的唯一的 ID。
maxOccurs	可选。规定 any 元素在父元素中可出现的最大次数。该值可以是大于或等于零的整数。若不想对最大次数设置任何限制，请使用字符串 "unbounded"。默认值为 1。
minOccurs	可选。规定 any 元素在父元素中可出现的最小次数。该值可以是大于或等于零的整数。若要指定该 any 组是可选的，请将此属性设置为零。默认值为 1。
any attributes	可选。规定带有 non-schema 命名空间的任何其他属性。

Example 1

This example is a statement against "personinfo" element, the element is necessary in order contains the following five elements: "firstname", "lastname", "address", "city", and "country".

<xs:element name="personinfo">
<xs:complexType>
<xs:sequence>
<xs:element name="firstname" type="xs:string"/>
<xs:element name="lastname" 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>

Example 2

This example is a statement for "pets" element may contain zero or more elements of dog and cat:

<xs:element name="pets">
<xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="unbounded">
<xs:element name="dog" type="xs:string"/>
<xs:element name="cat" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>

Complete XML Schema Reference

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