, 2000). The use of general-purpose languages for model-driven
development will be discussed further in Chapter 3.
1.3 AN EXAMPLE: MODELING WITH A GENERAL-PURPOSE
LANGUAGE AND A DOMAIN-SPECIFIC LANGUAGE
Let??™s illustrate the use of general-purpose modeling and domain-speci?¬?c modeling
through a small example. For this illustration, we use a domain that is well known
since it is already in our pockets: a mobile phone and its applications. Our task as a
software developer for this example is to implement a conference registration
application for a mobile phone. This small application needs to do just a few things:
A user can register for a conference using text messages, choose among alternative
payment methods, view program and speaker information, or browse the conference
program via the web. These are the basic requirements for the application.
In addition to these requirements, software developers need also to master the
underlying target environment and available platform services. When executing the
application in a mobile phone or other similar handheld device, we normally need to
know about the programming model to be followed, libraries and application
program interfaces (APIs) available, as well as architectural rules that guide
application development for a particular target environment.
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