Modeling concurrency with partial orders
International Journal of Parallel Programming
On multiple context-free grammars
Theoretical Computer Science
Complexity results for POMSET languages
SIAM Journal on Discrete Mathematics
Shuffle languages, Petri nets, and context-sensitive grammars
Communications of the ACM
Series-parallel languages and the bounded-width property
Theoretical Computer Science
LACL '96 Selected papers from the First International Conference on Logical Aspects of Computational Linguistics
Long-distance scrambling and tree adjoining grammars
EACL '91 Proceedings of the fifth conference on European chapter of the Association for Computational Linguistics
Characterizing structural descriptions produced by various grammatical formalisms
ACL '87 Proceedings of the 25th annual meeting on Association for Computational Linguistics
Journal of Artificial Intelligence Research
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This paper identifies two orthogonal dimensions of context sensitivity, the first being context sensitivity in concurrency and the second being structural context sensitivity. We present an example from natural language which seems to require both types of context sensitivity, and introduce partially ordered multisets (pomsets) mcfgs as a formalism which succintly expresses both.