Advanced Customization > Business Logic Customization > Data Exchange using Standards in Windchill > STEP Data Exchange using EXPRESS > PLCS Data Exchange > PLCS / AP239 Mapping Implementation > Adding Attributes in PLCS
  
Adding Attributes in PLCS
IBAs in PLCS format
IBAs in PLCS standard are represented by reference data. Every attribute on the business object is represented as reference data.
A IBA should be added first as reference data in PLCSRDL model. For more information see Handling Reference Data for information on how to add attribute to reference data.
Add an entry in attribute_to_rdl.properties for each attribute. The attribute_to_rdl.properties file is located in the <WT_HOME>/codebase/registry/stepdex/ap239/common/includes directory.
The attribute_to_rdl.properties is the file that relates attribute path to RDL entry (for example WTPart/name=urn:plcs:rdl:std:Part_name).
If the attribute is soft attribute, the softtype should be included in stepdex.properties. For more information see the “Supported Types” section in Business Field Mapping.