are Networks of Contains Relations.
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First and foremost, James forms are void-based.
You are welcome in the {lambda way} project, a light framework built on a wiki, {lambda tank}, and a functional programming language, {lambda talk}.
It is said that the father of LISP, John McCarthy, lamented the W3C's choice of SGML as the basis for HTML : « An environment where the markup, styling and scripting is all s-expression based would be nice. » The {lambda way} project could be an answer, small and simple.