Namespace Document

2 XML Schema

The function fn:json-to-xml() converts a JSON text to an XML representation, whose results that are always valid according to an XML Schema specified in [XSLT 3.0].

The schema is reproduced below:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified"
    targetNamespace="http://www.w3.org/2013/XSL/json"
    xmlns:j="http://www.w3.org/2013/XSL/json">
    
    <!-- 
     * This is a schema for the XML representation of JSON used as the target for the
     * XSLT 3.0 function fn:json-to-xml()
     *
     * The schema is made available under the terms of the W3C software notice and license
     * at http://www.w3.org/Consortium/Legal/copyright-software-19980720
     *
    -->
    
    <xs:element name="map" type="j:mapType">
        <xs:unique name="unique-key">
            <xs:selector xpath="*"/>
            <xs:field xpath="@key"/>
        </xs:unique>
    </xs:element>
    
    <xs:element name="array" type="j:arrayType"/>
    
    <xs:element name="string" type="j:stringType"/>
    
    <xs:element name="number" type="j:numberType"/>
    
    <xs:element name="boolean" type="xs:boolean"/>
    
    <xs:element name="null" type="j:nullType"/>
    
    <xs:complexType name="nullType">
        <xs:sequence/>
    </xs:complexType>
    
    <xs:complexType name="stringType">
        <xs:simpleContent>
            <xs:extension base="xs:string">
                <xs:attribute name="escaped" type="xs:boolean" use="optional" default="false"/>
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>
    
    <xs:simpleType name="numberType">
        <xs:restriction base="xs:double">
            <!-- exclude positive and negative infinity, and NaN -->
            <xs:minExclusive value="-INF"/>
            <xs:maxExclusive value="INF"/>
        </xs:restriction>
    </xs:simpleType>
    
    <xs:complexType name="arrayType">
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:element ref="j:map"/>
            <xs:element ref="j:array"/>
            <xs:element ref="j:string"/>
            <xs:element ref="j:number"/>
            <xs:element ref="j:boolean"/>
            <xs:element ref="j:null"/>
        </xs:choice>       
    </xs:complexType>
    
    <xs:complexType name="mapType">
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:element name="map">
                <xs:complexType>
                    <xs:complexContent>
                        <xs:extension base="j:mapType">
                            <xs:attribute name="key" type="xs:string"/>
                        </xs:extension>
                    </xs:complexContent>
                </xs:complexType>
                <xs:unique name="unique-key-2">
                    <xs:selector xpath="*"/>
                    <xs:field xpath="@key"/>
                </xs:unique>
            </xs:element>
            <xs:element name="array">
                <xs:complexType>
                    <xs:complexContent>
                        <xs:extension base="j:arrayType">
                            <xs:attributeGroup ref="j:key-group"/>
                        </xs:extension>
                    </xs:complexContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="string">
                <xs:complexType>
                    <xs:simpleContent>
                        <xs:extension base="j:stringType">
                            <xs:attributeGroup ref="j:key-group"/>
                        </xs:extension>
                    </xs:simpleContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="number">
                <xs:complexType>
                    <xs:simpleContent>
                        <xs:extension base="j:numberType">
                            <xs:attributeGroup ref="j:key-group"/>
                        </xs:extension>
                    </xs:simpleContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="boolean">
                <xs:complexType>
                    <xs:simpleContent>
                        <xs:extension base="xs:boolean">
                            <xs:attributeGroup ref="j:key-group"/>
                        </xs:extension>
                    </xs:simpleContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="null">
                <xs:complexType>
                    <xs:attributeGroup ref="j:key-group"/>
                </xs:complexType>
            </xs:element>
        </xs:choice>
    </xs:complexType>
    
    <xs:attributeGroup name="key-group">
        <xs:attribute name="key" type="xs:string"/>
        <xs:attribute name="escaped-key" type="xs:boolean" use="optional" default="false"/>
    </xs:attributeGroup>
    
</xs:schema>

This schema specifies the XML syntax of the result returned by fn:json-to-xml as defined in [XSLT 3.0]. It is located at http://www.w3.org/TR/2013/WD-xslt-30-20131212/schema-for-json.xsd.