Graphical Programming Language

Question

In control engineering or instrumentation, I see Simulink or LabVIEW(G) is pretty popular. In ESL design, I see that Agilent SystemVue is gaining some popularity.

If you see the well established compiler theroy, almost 100% is about the textual language. But how about the graphical language?

Is there any noticable research or discussion about the graphical programming language? In terms of

• Theory about Graphical Language - syntactic/semantic analysis and whatever relevant
• expressiveness (Actually, I asked a question about it at SO - What do you mean by the expressiveness of a programming language?)
• Possibility of the Graphical language
• ...

Or what do you think about the Graphical Programming Language?

Answer 1

Prograph is pretty cool - it's a general purpose graphical programming language and it uses a data flow paradigm.

See also Marten.