ASF(+)SDF Parsing Tools Applied to ELAN. Software Engineering (SEN).

摘要

This paper describes the development of a new ELAN parser using ASF + SDF parsing technology. ASF+SDF and ELAN are two modern rule-based systems. Both systems have their own features and application domains, however, both formalism have user-defined syntax for defining rewrite rules. The ASF+SDF Meta-Environment uses powerfull and efficient generic parsing tools, whereas the ELAN parser is based on an Early parser. Furthermore, the ELAN syntax is 'hard-wired' in the parser, which makes adaptations of the syntax cumbersome. The use of ASF+SDF parsing technology makes the ELAN syntax more open and adaptable, however, some features of the ELAN syntax makes the development of a parser a challenging problem.