Arit Paul and Chris Hitte

SQL is a subset of SIM SIM has the added functionality of:

◦ Classes◦ Subclasses

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

Class.java◦ EVA.java◦ EVAAttribute.java◦ DVA.java◦ DVAAttribute.java

Insert.java◦ Assignment.java

Modify.java Retrieve.java

◦ AttributePath.java

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

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

... In class visitor ...

EVA and DVA visitor call correct SPARQL

Class Subclass Insert Modify Retrieve

Concrete Syntax from Python.g

SPARQL conversion

Result of retrieve