I'm working on a proof of concept to explore how to connect SPARQL data from different data sources. I have two OWL classes, each from its own data model, representing information that I've extracted from two different systems. The data models look like:
Order: id, itemName, quantity
Item: id, name, unitPrice
What I would like to do is connect these two types together using the Order.itemName and Item.name fields, and create a new field on the Order class to store the total price for the order (order.quantity * item.unitPrice).
This would be pretty trivial to do with SPARQL, but we're looking at TopBraid Composer due to its graphical mapping capabilities. From my understanding, using a SPINMap we should be able to easily - and graphically - define the above property, but I'm having some problems getting things connected together.
I've been following the tutorial in the TBC Help under "Application Development Tools/SPIN/Ontology Mapping with SPINMap", but I'm having problems just trying to get a simple attribute mapped over. Based on that help document, on the Diagram tab I'm drawing a line from the Item Class to the Order class and selecting the changeNamespace function with an appropriate value. I then drew a line from the Item class to a new property on the Order class, totalPrice, and set the function to equals, just to see if I can get the property to show up. After running the inferences, I run a SPARQL query, and the totalPrice field is empty for all of my Order classes. I know this description was confusing - any idea what I should be doing to make this work?
