A parameter specifies the Attributes that should be included in the response. The value is either a comma-separated list of attributes, or the single keyword "all", which means that all available attributes of the object should be included in the response.

includefield = *("includefield" "=" (1#attribute / "all") )

The request may contain one or more include parameters; however, if a parameter with the value of "all" is present, then other includefield parameters shall not be present. If an attribute is a value of an includefield parameter, it is equivalent to C-FIND Universal matching for that attribute. See Section C.2.2.2.3 in PS3.4 .

The includefield Query Parameter corresponds to DIMSE Return Keys. See Section K.2.2.1.2 in PS3.4 .