Parameters 
Definition
Parameters are variables of objects and processes that are relevant to supply chain event management (SCEM-relevant). The parameters contain the information from the application system about an application object. They are defined and stored in SAP Event Management (SAP EM) in the form of control, info, and system parameters. This means that you can use SAP EM independently of an application system.
In addition, you can also set values for rule processing parameters while processing a rule set. You can use these rule processing parameters to transfer values from one task to the next task in the rule.
Use
Control, Info, and System Parameters
You use control, info, and system parameters in SAP EM in the rule set for processing search or information queries.
To select the control and info parameters in SAP EM Customizing, you create a parameter list for control and info parameters in the application system.
SAP EM stores information from the application system in the following parameter types:
● Control parameters
You use control parameters, together with system parameters, to specify the event handler type and the characteristics for an event handler.
● Info parameters
You use info parameters for all additional information that you want to transfer to the event handlers in SAP EM for display purposes. If you have permitted the use of info parameters for condition processing, you can use them for processing in the rule set. To do this, set the corresponding indicator within an info parameter.
● System parameters
These are all the control parameters that the application system transfers to the corresponding fields in the event handler extension table (for example, service provider ID, destination ID).
You need:
● Control parameters to specify and to check the SAP EM process steps (for example, service provider name, document type, material type).
● Info parameters for information and query purposes (for example, location).
● System parameters to specify the field values for typical search queries to SAP EM.
System parameters are therefore a special type of control parameter from the application system that use database indexing to enable you to make quicker search queries.
In the case of a shipment process, this may be the country of origin and the destination country, the name of the carrier, the mode, and the departure date.
● Control and info parameters to make your queries about SCEM-relevant information to SAP EM and to transfer the SCEM-relevant information to a data warehouse system.
Rule Processing Parameters
● You use rule processing parameters in SAP EM to transfer values from one task to another task in a rule. You use an activity to set the value of a rule processing parameter. You can access this value in rules (using an activity) or rule conditions.
● You have both read and write access to rule processing parameters during rule set processing.
Specifying Parameters in the Application System
Choose the transaction for defining EM interface functions in the application system to specify a parameter list for control and info parameters. You get these parameters as a selection list when defining expected events and control parameters in SAP EM Customizing.
Specifying Parameters in SAP EM
In SAP EM, choose the transaction for defining control, info, and rule processing parameters and the transaction for defining system parameters.
For more information on defining parameters in SAP EM, see the Implementation Guide (IMG) for Event Management ® Event Handlers and Event Handler Data ® Parameters.
Structure
Info and Control Parameters
Info parameters consist of either text for information and query purposes or organizational data for transferring data to a data warehouse. SAP EM saves the information in a string format (255 characters in length).
Control parameters save selected information in a string format (60 characters in length).
SAP delivers control and info parameters. You can, however, create your own.
SAP EM saves control and info parameters as various data records in a data container that has the following structure:
● Parameter name
● Index
● Parameter value (string)
● Length
● Original data type
System Parameters
SAP EM saves system parameters in their own database fields in the event handler extension table in Customizing. You can define your own system parameters using this extension table. Once you have defined a system parameter value you can no longer change it.
You store the field values for your typical search queries as a record in the event handler database table in Customizing, and set up a targeted index for these fields.
Rule Processing Parameters
SAP EM saves rule processing parameters as various data records in a data container that has the following structure:
● Parameter name
● Parameter value (string)
● Length
● Original data type
Integration
The interface between the application system and SAP EM uses a mapping process to transfer parameters from the application system to SAP EM (see Data Transfer from the Application System).
SAP EM uses parameters to create event handlers and to change them (see Event Handler Updating).
The Web interface displays info parameters and control parameters.
For more information, see Parameter Display in the Web Interface.
Example
Control parameters
Name |
Index |
Value |
Service provider |
|
ABC |
Mode |
|
TRUCK |
Priority |
|
HIGH |
Material class |
|
FROZEN GOODS |
Info parameters
Name |
Index |
Value |
Color |
|
BLUE |
Country |
|
USA |
Driver |
|
Jim Miller |
Material |
1 |
Corn flakes |
Material |
2 |
Chocolate corn flakes |
Sales organization |
|
1000 |
System parameters in the event handler extension table
Name |
Index |
Value |
Departure country |
|
ABC |
Destination country |
|
FRG |
Carrier |
|
SMITH |
Mode |
|
STREET |
Departure date |
|
01.01.01 |