They can be a work of literature, signs on the street, arrangement of blocks, or song styles to be interpreted. It is a set of symbols and signs that conveys and expresses a thought of the informative message. They can be a work of literature, signs on the street, arrangement of blocks, or song styles to be interpreted. It is a set of symbols and signs that conveys and expresses a thought of the informative message. They can be a work of literature, signs on the street, arrangement of blocks, or song styles to be interpreted. It is a set of symbols and signs that conveys and expresses a thought of the informative message.