| Purpose |
This element (the "sequence" particle) is used for expressing sequences in the content model of a complex type used for element definitions. This means that the child elements must appear in a given order. |
| Parent element | xs:choice,
xs:complexType,
xs:extension,
xs:group,
xs:sequence |
| Child elements | xs:any, xs:choice,
xs:element,
xs:group,
xs:sequence
|
| Attributes | minOccurs,
maxOccurs |
| Status | Optional. |
| Name | Type | Description |
|---|---|---|
minOccurs |
xs:nonNegativeInteger |
Together with the
maxOccurs attribute described below, this
attribute expresses multiplicity in TSD (and
XML
Schema) in sequence elements within a content model. The value of a
minOccurs attribute in an
xs:sequence declaration determines the minimum number of
occurrences of that sequence. The value of
minOccurs must be a non-negative integer. The
default value for minOccurs is 1.
|
maxOccurs |
xs:nonNegativeInteger or
"unbounded"
|
Together with the
minOccurs attribute described above, this
attribute expresses multiplicity in TSD (and
XML
Schema) in sequence elements within a content model. The value of a
maxOccurs attribute in an
xs:sequence declaration determines the maximum number of
occurrences of that sequence. The value of
maxOccurs must be a non-negative integer or the
value "unbounded". The default value for
maxOccurs is 1.
|
In the following example, within a p_record
element the five children from p_firstname to
p_country must each appear exactly once in the
order:
p_firstname
p_lastname
p_address
p_city
p_country
<xs:element name="p_record">
<xs:complexType>
<xs:sequence>
<xs:element name="p_firstname" type="xs:string"/>
<xs:element name="p_lastname" type="xs:string"/>
<xs:element name="p_address" type="xs:string"/>
<xs:element name="p_city" type="xs:string"/>
<xs:element name="p_country" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
This example illustrating the use of the xs:sequence element
is taken from the "patient" schema:
<xs:element name = "patient">
<xs:complexType>
<xs:sequence>
<xs:element ref = "name" minOccurs = "0"></xs:element>
<xs:element ref = "sex"></xs:element>
<xs:element ref = "born" minOccurs = "0"></xs:element>
<xs:element ref = "address" minOccurs = "0"></xs:element>
<xs:element ref = "occupation" minOccurs = "0"></xs:element>
<xs:element ref = "insurance" minOccurs = "0"></xs:element>
<xs:element ref = "nextofkin" minOccurs = "0"></xs:element>
<xs:element ref = "submitted"></xs:element>
<xs:element ref = "examination" minOccurs = "0"
maxOccurs = "unbounded"></xs:element>
<xs:element ref = "therapy" minOccurs = "0"></xs:element>
<xs:element ref = "result" minOccurs = "0"></xs:element>
<xs:element ref = "remarks" minOccurs = "0"
maxOccurs = "unbounded"></xs:element>
</xs:sequence>
<xs:attribute name = "ID" type = "xs:string"></xs:attribute>
</xs:complexType>
</xs:element>
It shows a sequence with a list of optional elements and two required
elements, i.e. sex and
submitted.
