<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns="https://api.gunengine.com/ingest/XMLSchema/feed/v2/offers"
           targetNamespace="https://api.gunengine.com/ingest/XMLSchema/feed/v2/offers"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified"
>
    <xs:element name="offers">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="offer" type="offerType" maxOccurs="unbounded"/>
            </xs:sequence>
        </xs:complexType>
    </xs:element>

    <xs:complexType name="offerType">
        <xs:all>
            <xs:element name="upc" type="xs:string"/>
            <xs:element name="mpn" type="xs:string" minOccurs="0"/>
            <xs:element name="name" type="xs:string"/>
            <xs:element name="brand" type="xs:string" minOccurs="0"/>
            <xs:element name="url" type="xs:anyURI"/>
            <xs:element name="availability">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:enumeration value="in stock"/>
                        <xs:enumeration value="out of stock"/>
                        <xs:enumeration value="backorder"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="price">
                <xs:complexType>
                    <xs:simpleContent>
                        <xs:extension base="xs:decimal">
                            <xs:attribute name="hide">
                                <xs:simpleType>
                                    <xs:restriction base="xs:string">
                                        <xs:maxLength value="30"/>
                                    </xs:restriction>
                                </xs:simpleType>
                            </xs:attribute>
                        </xs:extension>
                    </xs:simpleContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="shippingInfo" minOccurs="0">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:maxLength value="60"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="imageUrl" type="xs:anyURI" minOccurs="0"/>
            <xs:element ref="productSpecs" minOccurs="0"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="ammunitionType">
        <xs:all>
            <xs:element name="caliber" type="xs:string"/>
            <xs:element name="numberOfRounds" type="xs:positiveInteger"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="firearmType">
        <xs:all>
            <xs:element name="caliber" type="xs:string" minOccurs="0"/>
            <xs:element name="model" type="xs:string" minOccurs="0"/>
            <xs:element name="type" type="xs:string" minOccurs="0"/>
            <xs:element name="action" type="xs:string" minOccurs="0"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="partType">
        <xs:all>
            <xs:element name="type" type="xs:string"/>
        </xs:all>
    </xs:complexType>

    <xs:complexType name="reloadingType">
        <xs:all>
            <xs:element name="type">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                        <xs:enumeration value="brass"/>
                        <xs:enumeration value="bullet"/>
                        <xs:enumeration value="primer"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:element>
            <xs:element name="numberOfRounds" type="xs:positiveInteger"/>
            <xs:element ref="reloadingCaliberOrSize"/>
        </xs:all>
    </xs:complexType>

    <xs:element name="productSpecs" abstract="true"/>
    <xs:element name="ammunition" type="ammunitionType" substitutionGroup="productSpecs"/>
    <xs:element name="firearm" type="firearmType" substitutionGroup="productSpecs"/>
    <xs:element name="part" type="partType" substitutionGroup="productSpecs"/>
    <xs:element name="reloading" type="reloadingType" substitutionGroup="productSpecs"/>

    <xs:element name="reloadingCaliberOrSize" abstract="true"/>
    <xs:element name="bulletCaliber" type="xs:string" substitutionGroup="reloadingCaliberOrSize"/>
    <xs:element name="brassCartridge" type="xs:string" substitutionGroup="reloadingCaliberOrSize"/>
    <xs:element name="primerSize" type="xs:string" substitutionGroup="reloadingCaliberOrSize"/>
</xs:schema>
