System-Attributes Reference

The platform defines the following object (item) system attributes. For more information, see the description of system attributes in the Attribute Types documentation.

Attribute Description
__name Object name, which uniquely identifies the object within a collection and serves as the value of the object’s primary key. See Object Names and Primary Keys.
__size Object size.
__mode Object access control list (ACL).
__atime_secs Access time in seconds, as a Unix timestamp.
__atime_nsecs Nano-seconds resolution for the __atime_secs access time.
__mtime_secs Last modification time in seconds, as a Unix timestamp.
__mtime_nsecs Nano-seconds resolution for the __mtime_secs last modification time.
__ctime_secs Creation time in seconds, as a Unix timestamp.
__ctime_nsecs Nano-seconds resolution for the __ctime_nsecs creation time.
__uid Unique identifier (UID) of the object owner.
__gid Group identifier (GID) of the object owner’s group.
__obj_type Object type.
__collection_id Parent-collection ID. A collection can be a stream, a table, or a directory.