<preface> element references a topic or map containing
introductory information about a book, such as the purpose and structure of the document.
See appendix for information about this element in OASIS document type shells.
- map/topicref bookmap/preface
See the example in bookmap .
The following attributes are available on this element: Universal attribute group
, Link relationship attribute group
(with a narrowed definition of
given below), Attributes common to many map elements
from Topicref element attributes group
, outputclass, and
- A pointer to the resource represented by the
<topicref>. See The href attribute for detailed information on supported values and processing implications. References to DITA content cannot be below the topic level: that is, you cannot reference individual elements inside a topic. References to content other than DITA topics should use the
@formatattribute to identify the kind of resource being referenced.