The ONIX for Books Product Information Message is the
international standard for representing and communicating book
industry product information in electronic form.
ONIX for Serials is a family of XML formats for communicating
information about serial products and subscription information,
using the design principles and many of the elements defined in
ONIX for Books.
ANSI/NISO Z39.50 (=ISO 23950: "Information Retrieval (Z39.50): Application Service Definition and Protocol Specification") specifies a client/server-based protocol for
searching and retrieving information from remote databases.