heuristics_antonis.txt

• H1: Minimise optional graph patterns: Reduce the number of optional triple patterns by identifying those triple patterns for a given query that will always be bound using dataset statistics.
• H2: Use named graphs to localise SPARQL sub-graph patterns: Use named graphs to specify the subset of triples in a dataset that portions of a query should be evaluated against.
• H3: Reduce intermediate results: Use sequence paths to replace connected triple patterns where the object of one triple pattern is the subject of another.
• H4: Reduce the effects of cartesian products: Use aggregates to reduce the size of solution sequences.
• H5: Specifying alternative URIs: Consider different ways of specifying alternative URIs beyond UNION.


Additional tip: VALUE to top; works sometimes