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(librep.info)Printed Representation

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Printed Representation
----------------------

   As well as translating textual descriptions to Lisp objects, the
process may be reversed, converting a value back to a textual
description. The resulting text is known as the "printed
representation" of the object, and will usually be very similar to the
read syntax of the object (Note: Read Syntax).

   Objects which do not have a read syntax _do_ have a printed
representation, it will normally be of the form,

     #<RELEVANT-TEXT>

where the RELEVANT-TEXT is object-dependent and usually describes the
object and its contents. The reader will signal an error if it
encounters a description of an object in the format `#<...>'.