In fields metadata file, we define the entity's fields metadata required by the application's core mechanisms such as the security restrictions, query language, collaboration rules and workflow mechanisms.

What does this section cover?

<entityfieldconfig>
	<mainfield>
		<id>custom_number</id>
		<name>key_number</name>
		<xpath>number</xpath>
		<qlfieldname>rental.number</qlfieldname>
		<segmentpreviewname>ENTITYNUMBER</segmentpreviewname>
	</mainfield>
	<fields>
		<field>
			<id>custom_type</id>
			<name>key_type</name>
			<relatedentityxpath>type</relatedentityxpath>
			<xpath>name</xpath>
			<workflowruleconditionincluded>FIELD_CONTAINS_VALUE</workflowruleconditionincluded>
		</field>
		...
	</fields>
		
	<collections>
		<collection>
			<id>custom_items</id>
			<name>key_items</name>
			<relatedentityxpath/>
			<xpath>items</xpath>
			<qlfieldname>rental.items</qlfieldname>
			<method>
				<ejbname>CUSTOMCRMUIRental</ejbname>
				<methodname>loadItemsTab</methodname>
				<parameters>
					<parameter>
						<xpath>[DTO]</xpath>
					</parameter>
				</parameters>
			</method>
			<mainfield>
				<id>custom_serialNumber</id>
				<name>key_serialNumber</name>
				<relatedentityxpath>installedItem</relatedentityxpath>
				<xpath>altCode</xpath>
				<qlfieldname>rental.items.serial_number</qlfieldname>
			</mainfield>
			<fields>
				<field>
					<id>custom_code</id>
					<name>key_product_code</name>
					<relatedentityxpath>installedItem</relatedentityxpath>
					<xpath>product/code</xpath>
					<qlfieldname>rental.items.product_code</qlfieldname>
				</field>
				...
			</fields>
		</collection>
	</collections>
</entityfieldconfig>