feature | languages | example |
---|---|---|
disjunction | algae | (dc::title ?paper "Query Langs") || (dc::subject ?paper "Query Langs") |
safe negation | algae | (dc::title ?paper "Query Langs") ! (dc::subject ?paper "Query Langs") |
outer join | XUL, algae | (dc::title ?paper "Query Langs") ~ (dc::subject ?paper "Query Langs") |
value constraints | Squish | WHERE age > 7 |
premis | DQL, RuleML, algae | |
proof (justification request) | DQL* , cwm* , algae* | |
size bound | DQL, algae | |
pattern restriction | DQL |
*
in progress
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