Fun with inverse expressions

It is clear that the value of rr:inverseExpression can't just be any old SQL expression, but it must be an expression that … “reverses” an RDF term into a SQL condition. But what *exactly* does that mean?

I made an attempt at formalizing this:

This subsection is now officially my least-favourite part of R2RML…

This will probably need revision when ISSUE-35 is resolved, because it involves substitution of column *names* into a SQL template.


Received on Tuesday, 5 July 2011 12:28:21 UTC