Subject

The Subject of an email message should be a short summary of its contents. Email clients usually display it in a mailbox display together with the sender. Just like the sender, the date of the message and other meta-information, the Subject belongs to the email header.

In an RDF triple, the subject is the first of the three [Subject Predicate Object]; Object - In an RDF triple, the subject is the third of the three [Subject Predicate Object]; it is always a resource (blank node is a resource also).

The person whose identity is bound to a particular credential.

1. In cryptography, an entity whose public key is certified in a public key certificate. 2. Generally, a person, process, or device, causing information to flow among objects or change to the system state. [INFOSEC-99] 3. An active entity, generally in the form of a person, process, executing program or device that causes information to flow among objects or changes the system state. Examples: process, executing program [CESG]. See also: Object. 4. Abbreviation of security subject [ECMATR46]. 5. an active entity, generally in the form of a person, process, or device [ITSEC]. 6. An active entity that causes information to flow between objects or changes the system state; a process [POSIX.6]. 7. An active entity, generally in the form of a person, process, or device that causes information to flow among objects or changes the system state. Technically, a process/domain pair [TCSEC].