object

Matches the ID number of the object.

class

Matches the ID number of the class which the object is an instance of.

class_identifier

Matches the identifier of the class which the object is an instance of.

section

Matches the number of the section which the object belongs to.

section_identifier

Matches the identifier of the section which the object belongs to. Available since eZ Publish 4.4.

class_group

Matches the ID number of the group that the class which the object is an instance of belongs to.