on 08-10-2007 12:45 AM
Hi
What is the Definition of Key Field &Data Field.Plz reply me soon.
thanks
Kawal
hi
good
DATA FIELD->
During the Blueprint phase, the functional analysts will determine where the data will go in the SAP system, and how it will be used within the processes. Giant spreadsheets will emerge which ought to include - for each data element required - at least the following:
All SAP data fields within the element will be used - And this means all. It's quite simple ... if the field is not on the spreadsheet, it will not show up in SAP once the system is live. That usually helps focus the effort.
Then, for each field identified, document the field business rules (for example define what a Plant will be in SAP - is it a factory, a part of a factory, a truck etc) and also the field technical rules (for example 10 characters alphanumeric).
The same needs to be completed for the data as it is found in the legacy system(s) so that the real fun activity - mapping - can begin. Mapping is the seemingly simple task of associating a single field in SAP with one or more fields in the legacy systems. Sometimes it will not be a perfect fit in which case you will need to transform the legacy data to get it to fit. Add a few more columns to your spreadsheet and capture:
Legacy field it maps to
Legacy field business and technical rules
Any transformation required
Once you have completed this, and still within the Blueprint phase, you need to:
Get it signed off - this is a very big step as data is at the heart of the SAP system
Confirm the exact number and type of automated conversion programmes required
Write high level functional specs for each of these programmes
KEY FIELD-.
A table in the database in which all records from the pooled tables assigned to the table pool are stored corresponds to a table pool.
The definition of a pool consists essentially of two key fields (Tabname and Varkey) and a long argument field (Vardata). A pool has the following structure:
http://help.sap.com/saphelp_nw04/helpdata/en/cf/21f083446011d189700000e8322d00/frameset.htm
thanks
mrutyun^
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Field used for the unique identification of an object.
This is achieved with a key that consists of all the key fields of the object.
A key field is defined for an object type in Business Object Builder, and is a component of the object type.
A data field holds various characters such as alphanumeric,logical,data items,numbers etc
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