有没有办法限制 xsd 架构中的多个元素？

Question

I was doing xsd schema and I was thinking is there a way to make restriction for multiple elements and not only for one at a time. I want to do this so I can make the schema more readable.This is my schema:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
       targetNamespace="https://www.w3schools.com"
       elementFormDefault="qualified"
       xmlns="https://www.w3schools.com">
<xs:element name="WorldWideHappiness" type="worldHappiness"/>
<xs:complexType name="worldHappiness">
    <xs:all>
        <xs:element name="Record" type="recordType" maxOccurs="1" minOccurs="0"/>
    </xs:all>
</xs:complexType>

<xs:complexType name="recordType">
    <xs:sequence>
        <xs:element name="Country" type="countryType" maxOccurs="1" minOccurs="0"/>
    </xs:sequence>
</xs:complexType>

<xs:complexType name="countryType">
    <xs:sequence>
        <xs:element name="Name" type="xs:string"/>
        <xs:element name="Region" type="xs:string"/>
        <xs:element name="HappinessRank">
            <xs:simpleType>
                <xs:restriction base="xs:int">
                    <xs:minInclusive value="1"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:element>

        <xs:element name="HappinessScore">
        <xs:simpleType>
            <xs:restriction base="xs:double">
                <xs:minInclusive value="0.0"/>
            </xs:restriction>
        </xs:simpleType>
        </xs:element>

        <xs:element name="LowerConfidenceInterval">
            <xs:simpleType>
                <xs:restriction base="xs:double">
                    <xs:minInclusive value="0.0"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:element>

        <xs:element name="UpperConfidenceInterval">
            <xs:simpleType>
                <xs:restriction base="xs:double">
                    <xs:minInclusive value="0.0"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:element>

        <xs:element name="Health">

            <xs:simpleType>
                <xs:restriction base="xs:double">
                    <xs:minInclusive value="0.0"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:element>

    </xs:sequence>
</xs:complexType></xs:schema>

I want to know if I can give minInclusive for all of the simple types which has minInclusive 0.0 and not individually.

Answer 1

You need to define your own common simple type, and use where applicable. Any change to that simple type in one single spot will apply to all elements that are using it.

Please see below a conceptual example.

XML

<?xml version="1.0"?>
<root>
    <HappinessScore>0.1</HappinessScore>
    <LowerConfidenceInterval>0.75</LowerConfidenceInterval>
    <Health>770</Health>
</root>

XSD

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified">
    <xs:element name="root">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="HappinessScore" type="decimalType"/>
                <xs:element name="LowerConfidenceInterval" type="decimalType"/>
                <xs:element name="Health" type="decimalType"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>

    <xs:simpleType name="decimalType">
        <xs:restriction base="xs:decimal">
            <xs:minInclusive value="0.0"/>
        </xs:restriction>
    </xs:simpleType>
</xs:schema>