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3.9 Primitive syntax

After the import form within a library form or a top–level program, the forms that constitute the body of the library or the top–level program depend on the libraries that are imported. In particular, imported syntactic keywords determine the available syntactic abstractions and whether each form is a definition or expression. A few form types are always available independent of imported libraries, however, including constant literals, variable references, procedure calls, and macro uses.