An emerging trend in Social Networking sites and Web portals is the opening up of their APIs to external application develop- ers. For example, the Facebook Platform, Google Gadgets and Yahoo! Widgets allow developers to design their own applications, which can then can be integrated with the platform and shared with other users. However, current APIs are targeted towards develop- ers with programming expertise and database knowledge; they are not accessible to a large class of users who do not have a programming/database background, but would nevertheless like to create new applications. To address this need, we have developed the AppForge system, which provides a WYSIWYG application development platform. Users can graphically specify the components of webpages inside a Web browser, and the corresponding database schema and application logic will be automatically generated on the fly by the system.
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With the rise of model-driven development, model repositories are intended to facilitate research in model engineering and consequently in domain-specific modeling. Model repositories are central places where all kinds of modeling artifacts (e.g., meta-metamodels, metamodels, models, and possibly transformation models) are stored and coordinated. They can serve as a platform for making available the specification of metamodels to others (typically necessary for domain-specific modeling languages) and for exchanging models, as well as a resource for teaching/learning materials.
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Starting Excel
1. Main Menu: Contains all features in Excel.
2. Tool Bars: Standard Tool Bar and Formatting Tool Bar. These allow you quick access to commonly used tools.
3. Cell: The standard unit you work with in Excel.
4. Worksheet: The workspace of Excel.
5. Task Pane: Shows current options of your currently selected category.
6. Worksheet Tabs: Multiple Worksheets, easily changed by clicking on the tabs.
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This tutorial covers the main packages in the Spring Framework. For full details, we refer you to Rod Johnson’s book, Expert One-on-One J2EE Design and Development, published by Wrox Press in 2002. The book’s ISBN number is 1-86100-784-1. The code for the Spring Framework is contained in package com.interface21. We provide UML diagrams for the subpackages, as well as code samples.
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Decision-makers in every industry are constantly looking for more and more cost reduction and time-to-market acceleration, and
the software and system development industry is no exception to this rule. By taking advantage of the extensive use of both UML
and MDA TM (Model-Driven Architecture), technologies standardized by the OMG (Object Management Group), the Objecteering/UML integrated model-driven development environment allows you to make dramatic gains in productivity, quality and application reuse.
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C# is a modern object-oriented language for application development. In addition to object-oriented constructs, C# supports component-oriented programming with properties, methods and events.

UML defines graphical notations for describing and designing object-oriented software systems. It’s an open standard controlled by the Object Management Group (OMG). Although UML has many diagram types, we’ll focus on class models that show static class structure and relationships.
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The concurrency is an important issue to tackle when modelling real-time applications which are intrinsically concurrent. According to the definitions of real-time given in (CNRS 1988) and (Stankovic 88), real-time implies on one hand that the response are waited at a precise moment (neither before nor after) and on other hand, that such systems are coupled with the real world, therefore highly concurrent. This document overviews the support for concurrency modelling provided by UML. It describes first the main concept of active object and second a (non exhaustive) list of issues pertaining to concurrency mechanism interactions. The integration of concurrency issues within object-oriented environments generated a large amount of research.
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