By Henri Habrias, Marc Frappier
This name offers a transparent assessment of the most equipment, and has a realistic concentration that enables the reader to use their wisdom to real-life occasions. the next are only many of the options coated: UML, Z, TLA+, SAZ, B, OMT, VHDL, Estelle, SDL and LOTOS.
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Additional info for Software Specification Methods
SAZ and Z This chapter uses a conventional Z approach2 and Z notations defined in the draft standard [TOY 99]. Data types (for attribute domains) are defined as Z given sets, enumerated types and schemas. Schemas define the types of entities, sets of instances, and relationships. Z processing is defined on the combined state schema. Z specifications of SSADM function definitions are completed using schema calculus [WOO 89]. 2 Analysis and specification of case 1 The SSADM RA is expressed as a high level data model and a data flow model.
Is not explicitly set and can be any convenient new identifier. Here, we assume that the status of the new order is pending; this should be discussed with the customer to check that this is what is actually required. Question 19: When cancelling an order, is information concerning the order to be retained by the system? 14 Software Specification Methods Answer: We could either remove all information associated with the order from the system completely, or retain this information for possible future use.
Answer: There is only an order-processing process. This interacts with stored orders and stock levels. Although external entities must be involved in triggering this processing, these are outside the case study scope. 2 shows the single process, Process Order. The arrows are data flows to and from the data stores, Order File and Stock File. Additional documentation is not included, since the explanation is the case study text. In SSADM RA, data stores on DFDs correspond to one or more entities from the data model.
Software Specification Methods by Henri Habrias, Marc Frappier