Removing a Part

You can remove certain parts from the downstream structure when they are transferred from upstream. The logic can be defined by using a custom attribute on the Part Usage link or by specifying the types.

A custom attribute of data type Boolean can be created on WTPartUsageLink. If the value of the attribute for a particular part is set to Yes in BOM Transformer, the specified part is removed from the transferred structure. If the value of the attribute is blank, the part is not removed from the transferred structure. If the value is set to No, the part is never removed.

In the given example, the custom attribute REM is used to indicate the parts to be removed during transfer.

After the Generate Downstream Structure action is executed, the parts with the value of the attribute REM set to Yes are removed from the transferred structure. New usage links are created between the child nodes and grandparent nodes in the downstream structure.

When restructuring the transferred nodes, by default, the application creates a new downstream branch. You can customize this behavior in the resolver delegate.

To remove a part when generating the downstream structure, perform the following steps:

1. Create a custom attribute of data type Boolean on WTPartUsageLink, and set the default value to blank. For more information, see Creating a New Attribute and Default Values Tab.

2. Access the associativity.properties file located at Windchill/codebase/com/ptc/core/foundation/associativity.

3. Replace the default attribute name specified in the line <Property name="com.ptc.windchill.associativity.BomGenerationRemovalAttribute" default="xyz"/> with the new attribute name.

4. In BOM Transformer, assign the values: Yes or No for the newly created attribute in the Uses tab of the upstream structure.

Alternatively, you can remove parts when generating the downstream structure by specifying the types of those parts. Perform the following steps to specify the part types:

1. Access the associativity.properties file located at Windchill/codebase/com/ptc/core/foundation/associativity.

2. Add the types to be removed using comma-separated values in the line <Property name="com.ptc.windchill.associativity.BomGenerationRemovalType" multivalued="," default=""/>.

The types specified in the properties file are removed from the transferred structure. However, if the custom attribute value for any of the specified types is set to No, the part is not removed.

You can use both the custom attribute and the type to indicate the parts to be removed when generating the downstream structure. The following table describes the result of using both the criteria for removing parts.

Custom Attribute Value	Type	Result
Blank	Blank	Parts are not removed.
Blank	Value	Parts of the specified types are removed.
Yes	Blank	Parts with the custom attribute set to Yes are removed.
Yes	Value	Parts with the custom attribute set to Yes and parts of the specified types are removed.
No	Blank	Parts are not removed.
No	Value	Parts are not removed.