Commonly referenced descriptions

%display-atts;
Display attributes is a parameter entity declaration in the topic DTD that includes attributes whose values may be used for affecting the display of a topic or its selection by search tools.
%global-atts;
Debugging attributes, normally hidden from authoring view.
%id-atts;
ID attributes (%id-atts;) is a parameter entity declaration in the topic DTD that includes attributes that enable the naming and referencing of elements in a DITA topic: id and conref.
%rel-atts;
Relational attributes (<%rel-atts;>) is a parameter entity declaration in the topic DTD that includes attributes whose values may be used for representing navigational relationships. These attributes occur only on elements that represent relationships between topics.
%select-atts;
Attributes that support both filtering and flagging include platform, product, audience, and otherprops. Attribute rev only lets you flag information that matches a run-time parameter. Attribute importance currently provides output effects only for steps (where only the values "optional" and "required" are supported).
%univ-atts;
Universal attributes is a parameter entity declaration in the topic DTD, which defines a set of common attributes available on many DITA elements..
%topicref-atts;
The %topicref-atts; parameter entity represents a group of attributes used in numerous map elements: map, topicref, relcolspec, relcell, topichead, and topicgroup. The set is similar to those documented in topicref-atts-no-toc but includes the toc attribute.
%topicref-atts-no-toc;
The %topicref-atts-no-toc; parameter entity represents the set of attributes used in the reltable map element. The set is similar to those documented in topicref-atts but for <reltable> the toc attribute defaults to "no". For the other elements that use the %topicref-atts; group declaration, the toc attribute doesn't have a default; they can inherit their toc value from the nearest container, otherwise it functions upon output as if set to "yes".
Other common DITA attributes
The following attributes are not part of an entity group but are common to many elements.