The Babylonian texts like Code of Hammurabi in Akkadian and Sumerian seals of Urukagina state legal codes and regulations. Although the Indus script hasn't been deciphered, have any of the excavations resulted in similar seals which contain major textual references or is the Indus script just used as a tool for decoration?
Asko Parpola
Ancient Indus questions answered by Dr. Asko Parpola, Professor at the University of Helsinki, Finland, and author of Deciphering the Indus Script and The Corpus of Indus Seals and Inscriptions. He has numerous articles on this website, and the essay Deciphering the Indus Script.