Topic: SAP Tutorial
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Understanding SAP R3 - A Tutorial for Computer Scientists
The goal of this tutorial is to present the distributed system architecture, the data model,
the database programming language, the transaction and process model and the system evo-
lution concepts of SAP R 3 from a computer science perspective and to relate them to estab-
lished database and distributed system concepts. The presentation will help attendees under-
stand how SAP R 3 relates to their own research and development work and will provide a
well-structured foundation for a further study of SAP R 3's innovative system concepts. ...
SAP and R 3 use SERM Structured Entity Relationship Model for data modeling. SERM
was invented by SAP but is closely related to the common entity relationship model.
At the second level, the
design level
, processes are modeled with
work ows
which are
user-de ned EPCs. There is no notation to speci y functions at this level. The data model
of the analysis level is mapped to relational tables and foreign keys at this level. A data
dictionary and data dictionary tools help to maintain the association between SERM-entities
and relationships and relational tables
SAP is currently developing top down" a so-called business framework based on the
notion of business components. A business component exposes its functionality by means of
business-objects with stable BAPIs to other business components and to third-party client
applications.
Business objects will help to close the large semantic gap between the rather low-level
ABAP 4 function modules that have evolved bottom up" over the past decades and a
problem-oriented view on R 3 as a collection of logical components that have to be cus-
tomized, deployed and integrated with non-SAP software components
...
Source: www.sts.tu-harburg.de
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