System-Attributes Reference

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The platform defines the following object (item) system attributes. For more information, see the description of system attributes in the attribute-types introduction.

Note
The names of the predefined system attributes are reserved names in the platform. For more information, see Reserved Names.
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.
__last_sequence_num The sequence number of the last record in stream shard; applicable only to stream-shard objects.

See Also