<sep>
The <sep> element defines a separator character that is inline
         with the content of a syntax diagram. The separator occurs between keywords, operators
         or groups in
         a syntax definition. 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/sep
Example
<syntaxdiagram> <title>Adding</title> <groupseq><kwd>1</kwd><oper>+</oper><sep>(</sep><var>two</var><sep>)</sep> <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.