Integration with Other Applications > Windchill Workgroup Manager Documentation > NX > Administration and Configuration > Configuring Business Practices with NX > Configuring Windchill Attributes with NX > Mapping User-defined Authoring Application Parameters
  
Mapping User-defined Authoring Application Parameters
By default, user-defined CAD parameters are mapped to Windchill attributes with the same name. The administrator defines the ability for NX to access parameters that are mapped to Windchill attributes. Errors and conflicts may occur upon upload if a parameter from a CAD document is attempting to map to a soft attribute in Windchill with a type mismatch or constraint violation. Because Windchill attributes are pushed to the CAD document upon download, only attributes that have changed since content upload are modified on check out or download. The user may set changes to user-defined attributes into NX using Update.
NX User-defined Parameters
• PTC supports these types of NX parameters:
◦ Real Number
◦ String
◦ Integer
◦ Date*
* The date parameters are pushed from Windchill to the CAD application in the format of %m/%d/%Y %H:%M where (%m - month, %d - day, %Y - 4 digits year, %H – hours in 24-hour format, %M - minutes)
* 
NX does not support customer-defined attributes on Uses links.