public static function getPluginSchema($type)
    {
        $coreType = kPluginableEnumsManager::apiToCore('SchemaType', $type);
        if ($coreType != self::getSchemaTypeCoreValue(DropFolderXmlSchemaType::DROP_FOLDER_XML)) {
            return null;
        }
        $xmlApiType = BulkUploadXmlPlugin::getApiValue(XmlSchemaType::BULK_UPLOAD_XML);
        $baseXsdElement = BulkUploadXmlPlugin::getPluginSchema($xmlApiType);
        $xsd = '<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">';
        foreach ($baseXsdElement->children('http://www.w3.org/2001/XMLSchema') as $element) {
            /* @var $element SimpleXMLElement */
            $xsd .= '
	
	' . $element->asXML();
        }
        $xsd .= '
				
	<xs:complexType name="T_dropFolderFileContentResource">
		<xs:choice minOccurs="0" maxOccurs="1">
			<xs:element name="fileSize" type="xs:long" minOccurs="1" maxOccurs="1">
				<xs:annotation>
					<xs:documentation>
						The expected size of the file<br/>
						Used for validation
					</xs:documentation>
				</xs:annotation>
			</xs:element>
			<xs:element name="fileChecksum" minOccurs="1" maxOccurs="1">
				<xs:annotation>
					<xs:documentation>
						The expected checksum of the file<br/>
						md5 or sha1<br/>
						Used for validation
					</xs:documentation>
				</xs:annotation>
				<xs:complexType>
					<xs:simpleContent>
						<xs:extension base="xs:string">
							<xs:attribute name="type" use="optional" default="md5">				
								<xs:simpleType>
									<xs:restriction base="xs:string">
										<xs:enumeration value="md5"/>
										<xs:enumeration value="sha1"/>
									</xs:restriction>
								</xs:simpleType>
							</xs:attribute>
						</xs:extension>
					</xs:simpleContent>
				</xs:complexType>
			</xs:element>
		</xs:choice>
		<xs:attribute name="filePath" use="required">
			<xs:annotation>
				<xs:documentation>
					The name of the file in the drop folder
				</xs:documentation>
			</xs:annotation>
			<xs:simpleType>
				<xs:restriction base="xs:string">
					<xs:maxLength value="500"/>
				</xs:restriction>
			</xs:simpleType>
		</xs:attribute>
		<xs:attribute name="dropFolderFileId" type="xs:string" use="optional">
			<xs:annotation>
				<xs:documentation>
					The id of the drop folder file object
				</xs:documentation>
			</xs:annotation>
		</xs:attribute>
	</xs:complexType>

	<xs:element name="dropFolderFileContentResource" type="T_dropFolderFileContentResource" substitutionGroup="contentResource-extension">
		<xs:annotation>
			<xs:documentation>Specifies that content file location is within a Kaltura defined drop folder</xs:documentation>
			<xs:appinfo>
				<example title="Using file size validation example">
					<item>
						<action>add</action>
						<type>1</type>
						<media>...</media>
						<content>...</content>
						<thumbnail>
							<dropFolderFileContentResource filePath="file.jpg">
								<fileSize>453453344</fileSize>
							</dropFolderFileContentResource>
						</thumbnail>
					</item>
				</example>
				<example title="Using checksum validation example">
					<item>
						<action>add</action>
						<type>1</type>
						<media>...</media>
						<content>...</content>
						<thumbnail>
							<dropFolderFileContentResource filePath="file.jpg">
								<fileChecksum type="md5">sdfsjodf90sfsdfzfasdfwrg34</fileChecksum>
							</dropFolderFileContentResource>
						</thumbnail>
					</item>
				</example>
			</xs:appinfo>
		</xs:annotation>
	</xs:element>
	
	';
        $schemaContributors = KalturaPluginManager::getPluginInstances('IKalturaSchemaContributor');
        foreach ($schemaContributors as $key => $schemaContributor) {
            /* @var $schemaContributor IKalturaSchemaContributor */
            $elements = $schemaContributor->contributeToSchema($xmlApiType);
            if ($elements) {
                $xsd .= $elements;
            }
        }
        $xsd .= '
</xs:schema>';
        return new SimpleXMLElement($xsd);
    }