Combining control and data integration in the SPADE-1 process-centered software engineering environment

For Process-centered Software Engineering Environments (PSEEs) it is essential to provide the set of tools that are needed to actually produce software in practice. SPADE-1 is a PSEE originally designed in order to allow the developer to use regular Unix tools (such as vi and cc) and integrated environments based on the selective message broadcast (like DEC FUSE). However, this approach did not allow tools (and users) to share common structured data. This paper describes the mechanism that has been introduced in SPADE-1 in order to achieve both control-oriented integration and data-oriented integration of tools. In this way tools can share structured data in an ordered and controlled way