Information Technology Reference
In-Depth Information
Mapping Table I
Mapping Table II
System I
System II
Data
Export
Import
Fig. 7.6 Customising interfaces
formats handed over correspondingly. When exporting, sometimes a mapping table
can be superfluous when the export interface has been written accordingly.
The contents of mapping tables can be technical or business related: for example
contract codes, tariff categories, length of postal addresses etc. All this depends of
course on the application and can thus not be generalised.
7.2.4.2 Error Codes
It is well known that error messages generated by the system are generally useless
for the common user. For this reason most applications produce their own error
messages using special routines. Regarding language as well as contents of dedi-
cated error messages the message files are subject to specific customising.
7.2.4.3 Log Files
Log files used to record transactions need special attention regarding two aspects:
Formatting,
Selection.
When formatting, care has to be taken to clean the records from technical
information. This means that everything related to transaction codes and data
encryption, format references etc. should be left out. Only meaningful text infor-
mation should be recorded giving to the evaluator a clear picture of the transaction
events.
