====== XML Schema all Element ======

===== Definition and Usage =====

The all element specifies that the child elements can appear in any order and that each child element can occur zero or one time.

===== Element Information =====

  * **Parent elements:** group, complexType, restriction (both simpleContent and complexContent), extension (both simpleContent and complexContent)

===== Syntax =====

<code XML>
<all
id=ID
maxOccurs=1
minOccurs=0|1
any attributes
>

(annotation?,element*)

</all>
</code>

(The ? sign declares that the element can occur zero or one time, and the * sign declares that the element can occur zero or more times inside the all element)

^ Attribute ^ Description ^
| id | Optional. Specifies a unique ID for the element |
| maxOccurs | Optional. Specifies the maximum number of times the element can occur. The value must be 1. |
| minOccurs | Optional. Specifies the minimum number of times the element can occur. The value can be 0 or 1. Default value is 1 |
| any | attributes 	Optional. Specifies any other attributes with non-schema namespace |

===== Example 1 =====
<code XML>
<xs:element name="person">
  <xs:complexType>
    <xs:all>
      <xs:element name="firstname" type="xs:string"/>
      <xs:element name="lastname" type="xs:string"/>
    </xs:all>
  </xs:complexType>
</xs:element>
</code>

The example above indicates that the "firstname" and the "lastname" elements can appear in any order but both elements MUST occur once and only once!

===== Example 2 =====

<code XML>
<xs:element name="person">
  <xs:complexType>
    <xs:all minOccurs="0">
      <xs:element name="firstname" type="xs:string"/>
      <xs:element name="lastname" type="xs:string"/>
    </xs:all>
  </xs:complexType>
</xs:element>
</code>

The example above indicates that the "firstname" and the "lastname" elements can appear in any order and each element CAN appear zero or one time!