例句與造句

1. From the perspective of the DPO approach a graph rewriting rule is a pair of morphisms in the category of graphs and graph homomorphisms between them : r = ( L \ leftarrow K \ rightarrow R ) ( or L \ supseteq K \ subseteq R ) where K \ rightarrow L is injective.
2. GXL originated in the merger of GRAph eXchange format ( GraX : University of Koblenz, DE ) for exchanging typed, attributed, ordered, directed graphs ( TGraphs ), Tuple Attribute Language ( TA : University of Waterloo, CA ), and the graph format of the PROGRES graph rewriting system ( University Bw M黱chen, DE ).
3. Sometimes "'graph grammar "'is used as a synonym for "'graph rewriting system "', especially in the context of formal languages; the different wording is used to emphasize the goal of constructions, like the enumeration of all graphs from some starting graph, i . e . the generation of a graph language  instead of simply transforming a given state ( host graph ) into a new state.
4. It's difficult to find graph rewriting in a sentence. 用graph rewriting造句挺難的
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