Namespace

A namespace is a context, within which the names are unique. Namespaces can be hierarchical, Meaning the names within each hierarchical level are unique. Examples:

• Football: Namespace is the team. The shirt number is the unique name within this.
• Telephony: Namespace is the dialing code. The connecting number is the unique name within this.
• Domain name system (DNS): Namespace is a second-level domain. Here, the hostnames (www) and the subdomains (dev) are unique.
• URIs (Uniform Resource Identifiers): Each URI can be regarded as name with the superordinate resource as the namespace.