The Pan language-based editing system for integrated development
SDE 4 Proceedings of the fourth ACM SIGSOFT symposium on Software development environments
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Many kinds of complex documents, including programs, are based on underlying formal languages. Language-based editing systems exploit knowledge of these languages to provide services beyond the scope of traditional text editors. To be effective, these services must use the power of language-based information to broaden the options available to the user, but without revealing complex linguistic and implementation models. Users understand complex documents in terms of many overlapping structures, only some of which are related to linguistic structure. Communications with the user concerning document structures must be based on models of document structure that are natural, convenient, and coherent to the user. Pan is a language-based editing and browsing system designed to support development and maintenance of complex software documents. Pan uses a variety of mechanisms to help users understand and manipulate complex documents effectively, in terms of underlying language when necessary, but always in the framework of a coherent, user-oriented interface. A fully functional prototype is in regular use. It serves as a testbed for ongoing research on a wide variety of tools to aid document comprehension, as well as on language-based analysis methods.