Programming in ADA, PDF Tutorial

Learn Programming in ADA, a complet PDF Tutorial by Wikibooks contributors.

objectives

• Why Ada?
• Evolution of programming languages
• Ada Special
• Structure of an Ada program

Table of contents

• Cascading Style Sheets
• Then, What About XML File?
• Showing XML on Browsers
• XSL
• XSLT
• XSL-FO
• XPath
• Alternatives of XML Transformation
• Difference
• How Does XSLT Work
• XSLT Declaration
• XSLT Declaration w. Namespace
• XSLT Processing
• HTML Special Characters
• Examples Download

ADA language history

The Ada language was developed at the request of the US Department of Defense, concerned about the proliferation of programming languages for critical systems. Military systems were programmed in languages that were not commonly used in science, business and education, and the dialects of these languages proliferated. Each project was to acquire and maintain a development environment and train software engineers to support these systems for decades of deployment. Choosing a standard language would greatly simplify and reduce the cost of these logistical tasks.

A study of existing languages showed that none would be appropriate, so it was decided to develop a new language based on an existing language such as Pascal. The competition that followed was won by a team led by Jean Ichbiah, and the language published as ANSI / Mit in 1983 and as an ISO standard in 1987.

There were several unique aspects of Ada's development:

• The language has been developed to satisfy a formal set of requirements. This ensured that, from the beginning, the language included the features needed for the intended applications.
• The language proposal was published for scientific review before being fully implemented and used in applications. Many errors in the design have been corrected before they are removed by widespread use.
• The standard was finalized early in the history of language, and facilities were established to validate compilers against the standard. Adherence to the standard is particularly important for training, software reuse, and host / target development and testing.

A decade later, a second language design cycle was conducted by a team led by S. Tucker Taft. This conception followed the same principles as the previous one: the design team's proposals were published and criticized, and finally accepted as an international standard in 1995. This language is called Ada 95 when it is necessary to distinguish it from the previous version called Ada 83. The Ada 95 replaces the Ada 83 and almost all Ada 83 programs will remain unchanged in the Ada 95. In addition to the next short section, this book will present the Ada language as defined in 1995.