Skip to main content
Article thumbnail
Location of Repository

Bag Context Tree Grammars

By Sigrid Ewert, Brink Van Der Merwe, Christine Du Toit, Andries Van Der Walt and Johanna Högberg Frank Drewes


Bag context is a device for regulated rewriting in tree and string grammars. It represents context that is not part of the developing tree or string, but evolves on its own during a derivation. Motivation for investigating bag context tree languages is provided by showing that the class of bag context tree languages is the closure of the class of random context tree languages under linear top-down tree transductions. Furthermore, we establish an interchange theorem for subtrees of dense trees generated by bag context tree grammars. This result implies that the class of bag context tree languages is incomparable with the class of branching synchronization tree languages

Year: 2006
OAI identifier: oai:CiteSeerX.psu:
Provided by: CiteSeerX
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.