<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="indexerType" mixed="true">
<xs:annotation>
<xs:documentation>
Indexer declaration.
</xs:documentation>
</xs:annotation>
<xs:sequence>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="title" type="translatableType" />
<xs:element name="description" type="translatableType" />
<xs:element name="saveHandler" type="saveHandlerType" />
<xs:element name="structure" type="structureType" />
<xs:group ref="fieldset"/>
</xs:choice>
<xs:group ref="dependencies"/>
</xs:sequence>
<xs:attribute name="id" type="xs:string" use="required" />
<xs:attribute name="primary" type="nameType" use="optional" />
<xs:attribute name="view_id" type="viewIdType" use="required" />
<xs:attribute name="class" type="classType" use="required" />
<xs:attribute name="shared_index" type="xs:string" use="optional" />
</xs:complexType>

<xs:group name="fieldset">
<xs:choice>
<xs:element name="fieldset" type="fieldsetType"/>
</xs:choice>
</xs:group>

<xs:complexType name="translatableType">
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="translate" use="optional" fixed="true" type="xs:boolean"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>

<xs:simpleType name="viewIdType">
<xs:annotation>
<xs:documentation>
View ID can contain only [a-zA-Z0-9_].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9_]+" />
</xs:restriction>
</xs:simpleType>

<xs:simpleType name="classType">
<xs:annotation>
<xs:documentation>
Class name can contain only [a-zA-Z\].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z\\]+" />
</xs:restriction>
</xs:simpleType>

<xs:simpleType name="fromType">
<xs:annotation>
<xs:documentation>
From attribute can contain only [a-zA-Z0-9_].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9_]+" />
</xs:restriction>
</xs:simpleType>

<xs:simpleType name="toType">
<xs:annotation>
<xs:documentation>
To attribute can contain only [a-zA-Z0-9_].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9_]+" />
</xs:restriction>
</xs:simpleType>

<xs:simpleType name="originType">
<xs:annotation>
<xs:documentation>
To attribute can contain only [a-zA-Z0-9_].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9_]+" />
</xs:restriction>
</xs:simpleType>

<xs:simpleType name="nameType">
<xs:annotation>
<xs:documentation>
Class name can contain only [a-zA-Z\].
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="[a-zA-Z0-9_]+" />
</xs:restriction>
</xs:simpleType>

<xs:complexType name="fieldTypeAbstract" abstract="true">
<xs:annotation>
<xs:documentation>
Index field declaration.
</xs:documentation>
</xs:annotation>
<xs:attribute name="name" type="nameType" use="required"/>
<xs:attribute name="handler" type="classType" use="optional"/>
<xs:attribute name="origin" type="originType" use="optional"/>
</xs:complexType>

<xs:complexType name="fieldsetType" mixed="true">
<xs:annotation>
<xs:documentation>
Fieldset of field declaration.
</xs:documentation>
</xs:annotation>
<xs:sequence minOccurs="0">
<xs:element type="referenceType" name="reference" minOccurs="0" maxOccurs="unbounded" />
<xs:element name="field" type="fieldType" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="source" type="classType" use="required"/>
<xs:attribute name="provider" type="classType" use="optional"/>
<xs:attribute name="name" type="nameType" use="required"/>
</xs:complexType>

<xs:complexType name="fieldType">
<xs:complexContent>
<xs:extension base="fieldTypeAbstract">
<xs:choice>
<xs:element type="filterType" name="filter" minOccurs="0" maxOccurs="1" />
</xs:choice>
<xs:attribute type="dataType" name="dataType" use="optional" />
</xs:extension>
</xs:complexContent>
</xs:complexType>

<xs:complexType name="filterType">
<xs:annotation>
<xs:documentation>
Index field filter.
</xs:documentation>
</xs:annotation>
<xs:attribute name="class" type="classType" use="required"/>
</xs:complexType>

<xs:complexType name="structureType">
<xs:annotation>
<xs:documentation>
Structure type.
</xs:documentation>
</xs:annotation>
<xs:attribute name="class" type="classType" use="required"/>
</xs:complexType>

<xs:complexType name="saveHandlerType">
<xs:annotation>
<xs:documentation>
SaveHandler type.
</xs:documentation>
</xs:annotation>
<xs:attribute name="class" type="classType" use="required"/>
</xs:complexType>

<xs:complexType name="referenceType">
<xs:annotation>
<xs:documentation>
Index field reference.
</xs:documentation>
</xs:annotation>
<xs:attribute name="fieldset" type="nameType" use="required"/>
<xs:attribute name="from" type="fromType" use="required"/>
<xs:attribute name="to" type="toType" use="required"/>
</xs:complexType>

<xs:simpleType name="dataType">
<xs:restriction base="xs:string">
<xs:enumeration value="int" />
<xs:enumeration value="float" />
<xs:enumeration value="varchar" />
<xs:enumeration value="text" />
<xs:enumeration value="mediumtext" />
<xs:enumeration value="timestamp" />
<xs:enumeration value="datetime" />
<xs:enumeration value="date" />
</xs:restriction>
</xs:simpleType>

<xs:complexType name="searchable">
<xs:complexContent>
<xs:extension base="fieldType"/>
</xs:complexContent>
</xs:complexType>

<xs:complexType name="filterable">
<xs:complexContent>
<xs:extension base="fieldType"/>
</xs:complexContent>
</xs:complexType>

<xs:element name="config" type="configType">
<xs:unique name="uniqueIndexerId">
<xs:annotation>
<xs:documentation>
Indexer Id must be unique.
</xs:documentation>
</xs:annotation>
<xs:selector xpath="indexer" />
<xs:field xpath="@id" />
</xs:unique>
<xs:unique name="uniqueViewId">
<xs:annotation>
<xs:documentation>
Indexer Id must be unique.
</xs:documentation>
</xs:annotation>
<xs:selector xpath="indexer" />
<xs:field xpath="@view_id" />
</xs:unique>
</xs:element>
<xs:complexType name="configType">
<xs:sequence>
<xs:element ref="indexer" minOccurs="1" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>

<xs:element name="indexer" type="indexerType">
<xs:unique name="fieldsetKey">
<xs:annotation>
<xs:documentation>
Fieldset name must be unique.
</xs:documentation>
</xs:annotation>
<xs:selector xpath=".//fieldset"/>
<xs:field xpath="@name"/>
</xs:unique>
<xs:keyref name="fieldsetReference" refer="fieldsetKey">
<xs:annotation>
<xs:documentation>
Field fieldset key must exists.
</xs:documentation>
</xs:annotation>
<xs:selector xpath=".//fieldset/reference"/>
<xs:field xpath="@fieldset"/>
</xs:keyref>
</xs:element>

<xs:group name="dependencies">
<xs:choice>
<xs:element minOccurs="0" maxOccurs="1" name="dependencies" type="indexerDependencies">
<xs:unique name="uniqueIndexerDependency">
<xs:annotation>
<xs:documentation>
Related indexer id must be unique.
</xs:documentation>
</xs:annotation>
<xs:selector xpath="indexer" />
<xs:field xpath="@id" />
</xs:unique>
</xs:element>
</xs:choice>
</xs:group>

<xs:complexType name="indexerDependencies">
<xs:annotation>
<xs:documentation>
Root element of the indexer dependencies.
</xs:documentation>
</xs:annotation>
<xs:sequence maxOccurs="unbounded">
<xs:element minOccurs="0" maxOccurs="unbounded" name="indexer">
<xs:complexType>
<xs:annotation>
<xs:documentation>
Indexer dependency that represents another indexer.
</xs:documentation>
</xs:annotation>
<xs:attribute name="id" type="xs:string" use="required" />
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:schema>