#13 - Deriving complex typesΒΆ
Code Generation
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<xsd:annotation>
<xsd:documentation>
This example illustrates complex types that are derived from other specified types.
</xsd:documentation>
</xsd:annotation>
<xsd:element name="items" type="ItemsType"/>
<xsd:complexType name="ItemsType">
<xsd:choice minOccurs="0" maxOccurs="unbounded">
<xsd:element name="hat" type="ProductType"/>
<xsd:element name="umbrella" type="RestrictedProductType"/>
<xsd:element name="shirt" type="ShirtType"/>
</xsd:choice>
</xsd:complexType>
<!--Empty Content Type-->
<xsd:complexType name="ItemType" abstract="true">
<xsd:attribute name="routingNum" type="xsd:integer"/>
</xsd:complexType>
<!--Empty Content Extension (with Attribute Extension)-->
<xsd:complexType name="ProductType">
<xsd:complexContent>
<xsd:extension base="ItemType">
<xsd:sequence>
<xsd:element name="number" type="xsd:integer"/>
<xsd:element name="name" type="xsd:string"/>
<xsd:element name="description" type="xsd:string" minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="effDate" type="xsd:date"/>
<xsd:attribute name="lang" type="xsd:language"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<!--Complex Content Restriction-->
<xsd:complexType name="RestrictedProductType">
<xsd:complexContent>
<xsd:restriction base="ProductType">
<xsd:sequence>
<xsd:element name="number" type="xsd:integer"/>
<xsd:element name="name" type="xsd:token"/>
</xsd:sequence>
<xsd:attribute name="routingNum" type="xsd:short" use="required"/>
<xsd:attribute name="effDate" type="xsd:date" default="1900-01-01"/>
<xsd:attribute name="lang" use="prohibited"/>
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
<!--Complex Content Extension-->
<xsd:complexType name="ShirtType">
<xsd:complexContent>
<xsd:extension base="RestrictedProductType">
<xsd:choice maxOccurs="unbounded">
<xsd:element name="size" type="SmallSizeType"/>
<xsd:element name="color" type="ColorType"/>
</xsd:choice>
<xsd:attribute name="sleeve" type="xsd:integer"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<!--Simple Content Extension-->
<xsd:complexType name="SizeType">
<xsd:simpleContent>
<xsd:extension base="xsd:integer">
<xsd:attribute name="system" type="xsd:token"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<!--Simple Content Restriction-->
<xsd:complexType name="SmallSizeType">
<xsd:simpleContent>
<xsd:restriction base="SizeType">
<xsd:minInclusive value="2"/>
<xsd:maxInclusive value="6"/>
<xsd:attribute name="system" type="xsd:token"
use="required"/>
</xsd:restriction>
</xsd:simpleContent>
</xsd:complexType>
<xsd:complexType name="ColorType">
<xsd:attribute name="value" type="xsd:string"/>
</xsd:complexType>
</xsd:schema>
from dataclasses import dataclass, field
from typing import List, Optional
from xsdata.models.datatype import XmlDate
@dataclass
class ColorType:
value: Optional[str] = field(
default=None,
metadata={
"type": "Attribute",
}
)
@dataclass
class ItemType:
routing_num: Optional[int] = field(
default=None,
metadata={
"name": "routingNum",
"type": "Attribute",
}
)
@dataclass
class RestrictedProductType:
number: Optional[int] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
"required": True,
}
)
name: Optional[str] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
"required": True,
}
)
description: Optional[str] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
}
)
routing_num: Optional[int] = field(
default=None,
metadata={
"name": "routingNum",
"type": "Attribute",
"required": True,
}
)
lang: Optional[str] = field(
default=None,
metadata={
"type": "Attribute",
}
)
eff_date: XmlDate = field(
default=XmlDate(1900, 1, 1),
metadata={
"name": "effDate",
"type": "Attribute",
}
)
@dataclass
class SizeType:
value: Optional[int] = field(
default=None,
metadata={
"required": True,
}
)
system: Optional[str] = field(
default=None,
metadata={
"type": "Attribute",
}
)
@dataclass
class ProductType(ItemType):
number: Optional[int] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
"required": True,
}
)
name: Optional[str] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
"required": True,
}
)
description: Optional[str] = field(
default=None,
metadata={
"type": "Element",
"namespace": "",
}
)
eff_date: Optional[XmlDate] = field(
default=None,
metadata={
"name": "effDate",
"type": "Attribute",
}
)
lang: Optional[str] = field(
default=None,
metadata={
"type": "Attribute",
}
)
@dataclass
class SmallSizeType(SizeType):
system: Optional[str] = field(
default=None,
metadata={
"type": "Attribute",
"required": True,
}
)
@dataclass
class ShirtType(RestrictedProductType):
size: List[SmallSizeType] = field(
default_factory=list,
metadata={
"type": "Element",
"namespace": "",
}
)
color: List[ColorType] = field(
default_factory=list,
metadata={
"type": "Element",
"namespace": "",
}
)
sleeve: Optional[int] = field(
default=None,
metadata={
"type": "Attribute",
}
)
@dataclass
class ItemsType:
hat: List[ProductType] = field(
default_factory=list,
metadata={
"type": "Element",
"namespace": "",
}
)
umbrella: List[RestrictedProductType] = field(
default_factory=list,
metadata={
"type": "Element",
"namespace": "",
}
)
shirt: List[ShirtType] = field(
default_factory=list,
metadata={
"type": "Element",
"namespace": "",
}
)
@dataclass
class Items(ItemsType):
class Meta:
name = "items"
Data Binding
<items xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="chapter14.xsd">
<hat routingNum="123456" effDate="2002-04-02" lang="en-US">
<number>557</number>
<name>Ten-Gallon Hat</name>
<description>This is a great hat!</description>
</hat>
<umbrella routingNum="123" effDate="2002-04-02">
<number>557</number>
<name>Ten-Gallon Hat</name>
</umbrella>
<shirt routingNum="124" effDate="2002-04-02" sleeve="17">
<number>557</number>
<name>Short-Sleeved Linen Blouse</name>
<color value="blue"/>
<size system="US-DRESS">6</size>
</shirt>
</items>
<items>
<hat routingNum="123456" effDate="2002-04-02" lang="en-US">
<number>557</number>
<name>Ten-Gallon Hat</name>
<description>This is a great hat!</description>
</hat>
<umbrella routingNum="123" effDate="2002-04-02">
<number>557</number>
<name>Ten-Gallon Hat</name>
</umbrella>
<shirt routingNum="124" effDate="2002-04-02" sleeve="17">
<number>557</number>
<name>Short-Sleeved Linen Blouse</name>
<size system="US-DRESS">6</size>
<color value="blue"/>
</shirt>
</items>
{
"hat": [
{
"routingNum": 123456,
"number": 557,
"name": "Ten-Gallon Hat",
"description": "This is a great hat!",
"effDate": "2002-04-02",
"lang": "en-US"
}
],
"umbrella": [
{
"number": 557,
"name": "Ten-Gallon Hat",
"description": null,
"routingNum": 123,
"lang": null,
"effDate": "2002-04-02"
}
],
"shirt": [
{
"number": 557,
"name": "Short-Sleeved Linen Blouse",
"description": null,
"routingNum": 124,
"lang": null,
"effDate": "2002-04-02",
"size": [
{
"value": 6,
"system": "US-DRESS"
}
],
"color": [
{
"value": "blue"
}
],
"sleeve": 17
}
]
}
Samples Source
Definitive XML Schema by Priscilla Walmsley (c) 2012 Prentice Hall PTR