Weaving Rules into [email protected] for Embedded Smart Systems

Smart systems are characterised by their ability to analyse measured data in live and to react to changes according to expert rules. Therefore, such systems exploit appropriate data models together with actions, triggered by domain-related conditions. The challenge at hand is that smart systems usually need to process thousands of updates to detect which rules need to be triggered, often even on restricted hardware like a Raspberry Pi. Despite various approaches have been investigated to efficiently check conditions on data models, they either assume to fit into main memory or rely on high latency persistence storage systems that severely damage the reactivity of smart systems. To tackle this challenge, we propose a novel composition process, which weaves executable rules into a data model with lazy loading abilities. We quantitatively show, on a smart building case study, that our approach can handle, at low latency, big sets of rules on top of large-scale data models on restricted hardware.Comment: pre-print version, published in the proceedings of MOMO-17 Worksho

Semantics of OCL specified with QVT

The Object Constraint Language (OCL) has been for many years formalized both in its syntax and semantics in the language standard. While the official definition of OCL's syntax is already widely accepted and strictly supported by most OCL tools, there is no such agreement on OCL's semantics, yet. In this paper, we propose an approach based on metamodeling and model transformations for formalizing the semantics of OCL. Similarly to OCL's official semantics, our semantics formalizes the semantic domain of OCL, i.e. the possible values to which OCL expressions can evaluate, by a metamodel. Contrary to OCL's official semantics, the evaluation of OCL expressions is formalized in our approach by model transformations written in QVT. Thanks to the chosen format, our semantics definition for OCL can be automatically transformed into a tool, which evaluates OCL expressions in a given context. Our work on the formalization of OCL's semantics resulted also in the identification and better understanding of important semantic concepts, on which OCL relies. These insights are of great help when OCL has to be tailored as a constraint language of a given DSL. We show on an example, how the semantics of OCL has to be redefined in order to become a constraint language in a database domai

Enriching OCL Using Observational Mu-Calculus

Abstract. The Object Constraint Language is a textual specificatio

Integrating the ConcernBASE Approach with SADL

We describe ConcernBASE, a UML-based approach that is an instantiation of the IEEE's Conceptual Framework (Std 1471) for describing software architectures. We show how the approach supports advanced separation of concerns in software architecture by allowing one to identify and define multiple viewpoints, concern spaces and views of an architecture. Our work focuses on integrating the ConcernBASE approach with the Structural Architecture Description Language (SADL) in order to make the verification capabilities of SADL available to those who develop in UML. The result is a UML profile for structural description of software architecture. The paper also presents a prototype tool that supports this UML profile

Designing and Developing a Web-Based Post Graduate Application System for UUM

The internet technologies are rapidly increasing. The aim of the study is to design and develop a Web-based Postgraduate Application System (WPAS) for Universiti Utara Malaysia. The WPAS is a real-time application system which is free from traditional document processing procedures. It provides a convenient graphics user interface (GUI) for both student and admission department staff. It allows students to make self-apply for their selected apply online, degree program, view application status, and update application information time-to-time. It also allows administrator to manage student account, offer of place and admission information. All of the services are possible anywhere at any time

Early aspects: aspect-oriented requirements engineering and architecture design

This paper reports on the third Early Aspects: Aspect-Oriented Requirements Engineering and Architecture Design Workshop, which has been held in Lancaster, UK, on March 21, 2004. The workshop included a presentation session and working sessions in which the particular topics on early aspects were discussed. The primary goal of the workshop was to focus on challenges to defining methodical software development processes for aspects from early on in the software life cycle and explore the potential of proposed methods and techniques to scale up to industrial applications

Specifying System Behavior in UML

The purpose of the paper is to present our approach for specifying system behavior. Our approach is based on operation schemas and a system interface protocol (SIP). Operation schemas describe the functionality of system operations by pre- and post-conditions; they are written in the Object Constraint Language (OCL), as defined by the Unified Modeling Language (UML). A SIP describes the temporal ordering of the system operations by a UML protocol statemachine. Operation schemas are hybrids of formal specifications approaches such as Z and VDM : hybrid in the sense that they are based on their formal counterparts but are targeted to developers that are more comfortable with procedural programming languages rather than declarative languages. Our approach offers a middle ground between the informal descriptions of use cases and the solution-oriented models of object interaction in UML. We believe that declarative behavioral specification techniques, like the one proposed in this paper, lead to more confidence in the quality of the software because they allow one to reason about system properties