Terwilliger, Robert B. | Engineering Papers

NASA NTRS1985

An integrated modular environment for SAGA

A key component of the 'SAGA' metatool system for software development support is an integrated modular environment that furnishes a uniform view of software components and can be adapted for different programming languages and development methodologies. Attention is presently given to the model/representation of the entities thus used in software development; programs are structured on the basis of modules whose relationships form layers of abstraction. Different views of the program under development are provided for different development phases. The implementation of the modular environment based on the model of a UNIX system is presented.

Kirslis, Peter A.↗

NASA NTRS1985

ENCOMPASS: A SAGA based environment for the compositon of programs and specifications, appendix A

ENCOMPASS is an example integrated software engineering environment being constructed by the SAGA project. ENCOMPASS supports the specification, design, construction and maintenance of efficient, validated, and verified programs in a modular programming language. The life cycle paradigm, schema of software configurations, and hierarchical library structure used by ENCOMPASS is presented. In ENCOMPASS, the software life cycle is viewed as a sequence of developments, each of which reuses components from the previous ones. Each development proceeds through the phases planning, requirements definition, validation, design, implementation, and system integration. The components in a software system are modeled as entities which have relationships between them. An entity may have different versions and different views of the same project are allowed. The simple entities supported by ENCOMPASS may be combined into modules which may be collected into projects. ENCOMPASS supports multiple programmers and projects using a hierarchical library system containing a workspace for each programmer; a project library for each project, and a global library common to all projects.

Terwilliger, Robert B.↗