By C.J. Date
Offers an authoritative source for readers drawn to gaining perception into and figuring out of the rules of database platforms. offers good grounding within the foundations of database expertise and gives a few rules as to how the sector is probably going to advance sooner or later. New seventh version. DLC: Database administration.
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Additional info for An Introduction to Data Base Systems
But you do not need to switch everything to Web Services all at once. Web Services can be adopted incrementally and used in conjunction with current means of connecting internal systems. In the last chapter, starting on page 43, the use of middleware as an integration technique was discussed. 8 at the end of that chapter showed how Web Services could be used in conjunction with both CORBA and DCOM. This could apply to other proprietary vendor solutions and internally developed connections as well.
4 illustrates EDI using VANs. 4: EDI using Value-Added Networks (VANs). VANs provide functions such as message transmission, tracking, and in most cases, security. Using a VAN means that an organization needs to only deal with the VAN instead of connecting to every receiving organization. As such, the VAN acts as a broker, which simplifies using EDI for both sending and receiving organizations. 4 shows, the VANs usually used a proprietary network and continued to use fixed record formats since that was still the standard.
In Part III, an architecture will be presented that supports the use of these abstract models. There are, however, common beliefs that can cause problems with the execution and understanding of any methodology. We will examine some of those beliefs.  Probably one of the best-known frameworks is the Zachman Framework for Enterprise Architecture. com.  Some standards in this area include the Business Process Execution Language for Web Services (BPEL4WS), Business Process Modeling Language (BPML), Business Process Query Language (BPQL), and Business Process Specification Schema (BPSS).
An Introduction to Data Base Systems by C.J. Date