UPDATE (2012-07-04): TopBraid 3.6.1 is the last version supporting this syntax. It is now possible to embed SPARQLMotion scripts into SWP documents, and this provides very similar capabilities (and more).
SPARQLMotion is an RDF-based scripting language that is suitable to be presented and edited graphically to form data processing pipelines. Many of our customers are using SPARQLMotion and we are constantly extending and refining the tools to make it more powerful. One of the recent enhancements that made it into TopBraid 3.4 is support for an alternative textual notation for SPARQLMotion. A spec for this notation can be found here: