<topic>
 
A topic is a standalone unit of information.
Content model
<title>, (<shortdesc> | <abstract>)?, <prolog>?, <body>?, <related-links>?, <topic>*
Contained by
<title>- Optionally one of the following
 - Optional 
<prolog> - Optional 
<body> - Optional 
<related-links> - Zero or more 
<topic> 
Contained by
Inheritance
- topic/topic
The <topic> element is a base element type. It is defined in the topic module.
Attributes
The following attributes are available on this element: architectural attributes and universal attributes.
For this element, the @id attribute is
          required.
The following attributes are available on this element: universal attributes and the attributes defined below.
@DITAArchVersion(architectural attributes)- Specifies the version of the DITA architecture that is in
            use. This attribute is in the namespace
              
http://dita.oasis-open.org/architecture/2005/. This attribute is specified in the topic and map modules, and it uses a default value of the current version of DITA. The current default is 2.0. @id- For this element, the 
@idattribute is required. @specializations(architectural attributes)- Specifies the attribute-domain specializations that are
            included in the document-type shell. This attribute is set as a
            default within the document-type shell. The value varies
            depending on what domains are integrated into the document-type
            shell. For example, a
              grammar file that includes the specialized attributes
                
@audience,@deliveryTarget, and@newBaseAttwould set the value to@props/audience @props/deliveryTarget @base/newBaseAtt. 
Example
This section is non-normative.
The following code sample shows the primary structural components of a topic: title, short description, prolog, body, and related links:
<topic id="topic">
  <title>The basic structure of a topic</title>
  <shortdesc>A topic has a well-established structure. </shortdesc>
  <prolog>
  <!-- Metadata can be stored here.-->
  </prolog>
  <body>
    <p>A typical topic contains a title, short description, and body.</p>
  </body>
     <related-links>
       <!--Related links can be defined directly in a topic or by using 
           a relationship table.--></related-links>
</topic>