<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.w3.org/2005/xpath-functions"
    xmlns:fn="http://www.w3.org/2005/xpath-functions"
    elementFormDefault="qualified">
    
    <!-- 
     * This is a schema for the XML representation of JSON used as the target for the
     * function fn:analyze-string()
     *
     * 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="analyze-string-result" type="fn:analyze-string-result-type"/>
    <xs:element name="match" type="fn:match-type"/>
    <xs:element name="non-match" type="xs:string"/>
    <xs:element name="group" type="fn:group-type"/>
    <xs:element name="lookahead-group" type="fn:lookahead-group-type"/>
    
    <xs:complexType name="analyze-string-result-type" mixed="true">
        <xs:sequence>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="fn:match"/>
                <xs:element ref="fn:non-match"/>
            </xs:choice>
        </xs:sequence>
    </xs:complexType>
        
    <xs:complexType name="match-type" mixed="true">
        <xs:sequence>
            <xs:element ref="fn:group" minOccurs="0" maxOccurs="unbounded"/>
            <xs:element ref="fn:lookahead-group" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>
    
    <xs:complexType name="group-type" mixed="true">
        <xs:sequence>
            <xs:element ref="fn:group" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="nr" type="xs:positiveInteger"/>
    </xs:complexType>

    <xs:complexType name="lookahead-group-type">
        <xs:attribute name="nr" type="xs:positiveInteger"/>
        <xs:attribute name="value" type="xs:string"/>
        <xs:attribute name="position" type="xs:positiveInteger"/>
    </xs:complexType>
 
</xs:schema>
