Blogs tagged johannes reich

SOA is dead, long live BNT! Ups, but BNT – now, what is that? As Henning Kagermann has formulated in the last employee meeting of SAP: Agility unfolds only in a world of ‘And’. Only if we succeed in embracing seemingly... Read More »

In the SOA literature, often the car example is cited to illustrate the way a software system is composed out of its parts. However, it’s quite interesting to push this analogy a bit further and imagine what place process-like interactions... Read More »

Currently we see some attempts of process descriptions (e.g. UMM of UN/CEFACT, RosettaNet, etc.), which rely on decomposition of processes into single one- or two-way interactions. These attempts where influenced by the linguistic speech act theory... Read More »

Before I come to the question whether object orientation does or does not have its limitations, I would like to define what a class in the object oriented sense is to me.  To me, a class is a description of a data type T together with a... Read More »

The issue Imagine, you have to specify a typed method. How do you know, what this method and its signature are supposed to look like? There is a simple answer to that question: just look at the semantics of the method definition, i.e. at its... Read More »

A typical scenario: Software component A, providing some function a may depend on some other software component B of which it comsumes function b. Business as usual Now, what happens, if there are circular functional dependencies, i.e. component A... Read More »

To resume the thread of the Descriptions and Models (1) – Four surprises: ‘modelling’ is synonymous with ‘describing’ even in the world of physics. E.g. modelling the physical system of a mechanical pendulum, we... Read More »

This blog series champions the application of essential model theoretic concepts to computers and computation and tries to show some surprising consequences. It is one of the great achievements of model theory to present a concise approach how to... Read More »

In the world of web services there seems to be some confusion about the value and place of transactional control. The general WSDL definition does not even mention this problem and there are several competing standard approaches like WS-Transaction... Read More »

As promised in my last blog About Electronic Documents, Business Documents and Messages I will ponder a bit about the necessity to separate serialization from sending functionality for realization of security measures like the qualified electronic... Read More »