Extending Definite Clause Grammar to handle flexible word order

Parsing a flexible word order language

“…EFOG is based on a previous version of the formalism, called FOG (Pericliev and Grigorov 1992), also seeking to overcome the difficulties with the ID/LP format. FOG however looked for different solutions to the problems (e.g.…”

“…EFOG is based on a previous version of the formalism, called FOG (Pericliev and Grigorov 1992), also seeking to overcome the difficulties with the ID/LP format. FOG however looked for different solutions to the problems (e. g. using LP rules attached to each specific ID rule, rather than global ones, which unnecessarily proliferated the LP part of the grammar; or employing flattening rather than having non-contiguous grammar symbols to the same effect).…”

“…There seem to be a number of requirements that such a formalism should (try to) fulfil (e. g. Pericliev and Grigorov 1992). Among these stand out the formalism's: (i) Expressive power, i. e. capability of (reasonably) handling complex WO phenomena, or "flexible" WO.…”