`<oper>`

The <oper> element defines an operator within a syntax definition. Typical operators are equals (=), plus (+) or multiply (*). This element is part of the DITA programming domain, a special set of DITA elements designed to document programming tasks, concepts, and reference information.

Content models

See appendix for information about this element in OASIS document type shells.

Inheritance

+ topic/ph pr-d/oper

Example

<syntaxdiagram>
  <title>Adding</title>
  <groupseq><kwd>1</kwd><oper>+</oper><var>two</var>
<delim>=</delim><kwd>something</kwd>
  </groupseq>
</syntaxdiagram>

Attributes

The following attributes are available on this element: Universal attribute group (with a narrowed definition of @importance, given below) and outputclass.

@importance

The attribute indicates whether this item in a syntax diagram is optional, required, or default. Output processors can indicate this designation in a generated diagram. Allowable values are:

optional: This section of the syntax is optional.
required: This section of the syntax is required.
default: This section of the syntax is used by default or has this default value.
-dita-use-conref-target: See Using the -dita-use-conref-target value for more information.