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Research on the Top-Down Parsing Method for Context-Sensitive Graph Grammars.

Wang Y, Zeng X, Ding H - PLoS ONE (2015)

Bottom Line: The parsing problem is one of the key problems of graph grammars.The typical parsing algorithm uses the bottom-up method.This method avoids the subgraph isomorphism judgment and selects the productions specifically, so that the time-complexity is greatly reduced.

View Article: PubMed Central - PubMed

Affiliation: Institute of Intelligence Science and Technology, Hohai University, Nanjing, P.R. China.

ABSTRACT
The parsing problem is one of the key problems of graph grammars. The typical parsing algorithm uses the bottom-up method. The time-complexity of this method is high, and it is difficult to apply. In order to reduce the time-complexity, this paper uses the top-down method for parsing. This method avoids the subgraph isomorphism judgment and selects the productions specifically, so that the time-complexity is greatly reduced.

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A set of productions of LGG.
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pone.0142776.g001: A set of productions of LGG.

Mentions: In the productions of the LGG [13], the context information is the nodes, and the corresponding nodes have the same labels. That is to say, when embedding, these nodes will not be changed. As shown in Fig 1.


Research on the Top-Down Parsing Method for Context-Sensitive Graph Grammars.

Wang Y, Zeng X, Ding H - PLoS ONE (2015)

A set of productions of LGG.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664237&req=5

pone.0142776.g001: A set of productions of LGG.
Mentions: In the productions of the LGG [13], the context information is the nodes, and the corresponding nodes have the same labels. That is to say, when embedding, these nodes will not be changed. As shown in Fig 1.

Bottom Line: The parsing problem is one of the key problems of graph grammars.The typical parsing algorithm uses the bottom-up method.This method avoids the subgraph isomorphism judgment and selects the productions specifically, so that the time-complexity is greatly reduced.

View Article: PubMed Central - PubMed

Affiliation: Institute of Intelligence Science and Technology, Hohai University, Nanjing, P.R. China.

ABSTRACT
The parsing problem is one of the key problems of graph grammars. The typical parsing algorithm uses the bottom-up method. The time-complexity of this method is high, and it is difficult to apply. In order to reduce the time-complexity, this paper uses the top-down method for parsing. This method avoids the subgraph isomorphism judgment and selects the productions specifically, so that the time-complexity is greatly reduced.

Show MeSH