Complex command reference content
When documenting complex software command references, you can use a combination of DITA phrase elements to describe the syntax. The mark-up can be converted to syntax formatting conventions during the publishing process.
In style-based authoring, formatting conventions have been used to identify the parts of command syntax for computer software applications. In this context, a command is a string of text that a user types in order to run an application and pass arguments to the application.
The Microsoft Manual of Style for Technical Publications suggests a syntax of:
- command in bold
- a set of choices surrounded by { }
- individual choices separated by |
- variable names in italics
- repeatable arguments indicated by ...
- optional items surrounded by [ ] or [[ ]].
For example, a command syntax might be represented as ant [-f filename] [-logfile filename] [-verbose].
- kwd
- A literal keyword used in a command, utility or batch file
- option
- an option or switch that modifies a command
- oper
- An operator (such as *, + or =)
- var
- The name of a variable or argument
- delim
- A delimiter character used to identify the beginning or end of one part of the syntax
- sep
- A separator character such as a bracket that is used within syntax
The syntax mark-up should be contained as a whole within a syntax phrase (synph) or syntax block (synblk) element.
<synph>
<kwd>ant</kwd> <option>-f</option> <var>filename</var>
<option>-logfile</option> <var>filename</var>
<option>-verbose</option>
</synph>
A typical output of this code is:
ant -f filename -logfile filename -verbose
When the command syntax is being used within an instruction to a user (usually within a task topic), the syntax should instead be contained within a userinput element, without the individual components of the command semantically identified.