Jsimparser with ReL

1. Jsimparser with ReL Arit Paul and Chris Hitte

2. SIM vs SQL • SQL is a subset of SIM • SIM has the added functionality of: • Classes • Subclasses

3. Overview of Changes • Preserved existing SIM and SQL functionality of ReL • Created jsimparser • Modified PyTuple.java to call jsimparser • Modified Python.g to pass concrete syntax • Created SIMVisitor

4. Created Classes • Class.java • EVA.java • EVAAttribute.java • DVA.java • DVAAttribute.java • Insert.java • Assignment.java • Modify.java • Retrieve.java • AttributePath.java

5. JSimparser • Created JSIMparser based on JSQLparser • JSIMparser: • Accepts concrete syntax from PyTuple.java • Stores parsed data in instances of our newly defined classes • Builds AST from the instances • AST is visited by SIMVisitor

6. JSimparser

7. SIMVisitor • Created SIMVisitor based on SIMHelper and SQLVisitor • SIMVisitor: • PyTuple passes the AST to SIMVisitor • Visits the nodes of the AST produced by JSIMparser • Pulls key data from these nodes • Builds an equivalent SPARQL statement • SPARQLDoer executes this statement

8. PyTuple

9. ... In class visitor ... EVA and DVA visitor call correct SPARQL

10. SIMDemo.py • Class • Subclass • Insert • Modify • Retrieve

11. Q&A

12. Concrete Syntax from Python.g SPARQL conversion Result of retrieve