Transfer of Material Classification Data 
SAP ERP contains classification data for each material within the material master.
This function enables the transfer of material master classification data from SAP ERP to SAP ME to create a corresponding material record with custom data in SAP ME (see Material, Custom Data, and Material Transfer).
Classification data is distributed only when an assignment exists in the material master record.
Integration
The material master is used by all components in the SAP Logistics System.
The classification data contained in the material master is used in Materials Management to further describe materials using the following characteristics:
The class type determines how classes are processed, and how objects can be classified and retrieved in these classes.
Characteristics describe the properties of objects. The values of a characteristic specify these properties.
Prerequisites
SAP ERP
You have created classification data for class type 001 in the Cross-Application module (see Creating, Changing, and Displaying Classes).
You have assigned classifications in the material master record (see Classifying a Material).
You have set up ALE communication to create and transmit CLFMAS IDocs (see Customizing for ALE for Communication with SAP ME).
Activities
You create a material master record with classification data in SAP ERP (see Creating a Material Master Record).
You send the material to SAP ME.
SAP ERP creates the corresponding classification IDoc when the material master IDoc is generated.
SAPMEINT creates the corresponding material record with custom data in SAP ME (see Material Maintenance).