Chapter 7. Building Applications with SPARQL: A Brief Tour
Before looking at how different aspects of SPARQL technology can contribute to an application, let’s step back and look at the bigger picture. What role does any query language play in an application? In a typical application scenario, regardless of the choice of technology used, you might have a central store of data and several client processes sending requests to that central store for delivery and perhaps updating of that data. These requests usually ask for subsets of the data that meet certain conditions, and they may specify that the columns of results be in a particular order and that the results are sorted according to the values of one or more of the columns. Upon receiving the results, the client processes use the returned information to achieve their own goals—perhaps rendering information on a display, or turning a machine on or off, or saving some data for use in future calculations.
Using a web browser to look through an online clothing retailer’s T-shirt selection or using a specialized app on your phone to check next week’s weather ...