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@@ -51,6 +51,11 @@ Text evaluates to itself.
Atoms consists of symbols or numbers. Symbols evaluate to the bound value in the
environment. Numbers evaluate to themselves.
+Defining a function with a group predicate causes the chain to consume all its
+siblings up to the first primitive for which the predicate is true. When
+evaluating the body of such a chain, an additional variable @siblings is defined
+in the scope and expands to the content of all consumed siblings.
+
# How to contribute
If you would like to contibute to the development of chains please send a mail