Enterprise Administration > Implementing Windchill ESI > Implementing Windchill ESI in an ORACLE Applications Environment > XML Schemas > Common Business Object (CBO) > Common Business Object Schema: Object Header > BOM Schema > Reference Designator on a BOM Schema
  
Reference Designator on a BOM Schema
The following describes the elements contained in the schema for the reference designator on a BOM.
Element
Description
ObjectHeader
The system information for the current object. For more information, see Common Business Object Schema: Object Header.
WCID
Unique identifier for the BOM children; internal to Windchill PDMLink.
ChildPartNumber
Part number for the child in the distribution target.
AssemblyPartNumber
Part number for the BOM header in the distribution target.
ReferenceDesignator
The identifier for the Reference Designator in the distribution target; used primarily for microchip design when multiple instances of the same part are needed on the same board.
LineNumber
The value, when used, allows the same part to be on multiple lines of a BOM as long as the multiple lines have different LineNumbers.
ReferenceLinkUserArea
A complex element that can contain any number of extra child elements that are required in ReferenceDesignator processing. This provision is provided for customization.