Segue: support for distributed graphical interfaces

The authors describe their experiences developing Segue, an interface tool for supporting application programs that manipulate tree-like data structures. This semantic domain, although restrictive, includes a number of important application programs, such as structured editors, incremental compilers, and file system managers. The user interface tools described here support the Distributed Ada Programming Support Environment (DAPSE). The authors discuss the structure of Segue, present the R2D unparsing system, and examine tree-to-tree mappings. They then present three Segue user interfaces: an Ada editor, an Ada library manager, and the Gift interface specification tool.<
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