ISO/IEC 9594, also known as the Directory Services standard, defines a framework for accessing and managing directory information in a network. It specifies how directory services can be used to store and retrieve data about users, devices, and resources, facilitating efficient communication and resource management. The standard is part of the Open Systems Interconnection (OSI) model and is commonly associated with the Lightweight Directory Access Protocol (LDAP). It aims to ensure interoperability between different systems and applications, allowing organizations to maintain a centralized directory for easier access and administration of network resources.