Enterprise Administration > Implementing Windchill ESI > Implementing Windchill ESI in an SAP Environment > XML Schemas > Common Business Object (CBO) > Common Business Object Schema: Object Header > BOM Schema > BOM Substitute Schema
  
BOM Substitute Schema
The following describes the elements contained in the substitute on a BOM schema.
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.
SubstitutePartNumber
Part number for the substitute in the distribution target.
AlternateItemGroup
The value in the distribution target used to group children with their substitutes.
Quantity
Number of children on the BOM.
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.
OldLineNumber
If the element DeletedSubstitutes/substitute exists in the response then the element DeletedSubstitutes/substitute/LineNumber is mapped to OldLineNumber.
SubstituteLinkUserArea
Optional. Stores all user-defined data used for customization.