StruQL Details

• Regular path expressions are constructed by a grammar:

R <- “a” | e | R1.R2 | R1|R2 | R1* | L | _

• Atoms in the WHERE clause are of the form X -> R -> Y

or C(X)

• The LINK clause includes atoms of the form:

LINK f(X) --> “new link” --> g(X) or

LINK f(X) --> L --> g(X)

• Queries can be nested, inheriting the WHERE clauses of

their outer blocks.

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