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Triquetrum/FAQ
Frequently Asked Questions for the Eclipse Triquetrum project.
Contents
General
What is a triquetrum, anyway?
"The triquetrum (derived from the Latin tri- ["three"] and quetrum ["cornered"]) was the medieval name for an ancient astronomical instrument first described by Ptolemy (c. 90–c. 168) in the Almagest (V. 12)" (Source: Wikipedia)
Pictured is the triquetrum of Copernicus from Meyers Großes Konversations-Lexikon 6. Auflage 1905–1909.
The Eclipse Triquetrum project uses Ptolemy II as its execution engine and the Ptolemy II icon shows Ptolemy holding a triquetrum. The name also evokes the model-view-controller pattern.
How is triquetrum pronounced?
We asked a Latin teacher for the proper pronunciation, who stated that the correct Latin translation is the same as the second English option in this video: tri-QUET-rum, not tri-QUEET-rum
What is the relationship between Triquetrum and Ptolemy II?
Triquetrum uses Ptolemy II as Triquetrum's execution engine. For details about Ptolemy II, see http://ptolemy.eecs.berkeley.edu/ptolemyII/. ->"Ptolemy II is an open-source software framework supporting experimentation with actor-oriented design. Actors are software components that execute concurrently and communicate through messages sent via interconnected ports. A model is a hierarchical interconnection of actors. In Ptolemy II, the semantics of a model is not determined by the framework, but rather by a software component in the model called a director, which implements a model of computation."
What is the relationship between Triquetrum and Kepler?
Ptolemy II is the execution engine used by both Triquetrum and the [| Kepler Scientific Workflow System]. We see Triquetrum as a possible way forward for Kepler to use a more common build infrastructure and to otherwise leverage the Eclipse ecosystem. One of the goals of Triquetrum is for Triquetrum to be able to open at least some Kepler mode.
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