Variables in your topics act as "placeholders" that can be filled with changeable data.
Say for example, you need to produce content for your many different clients. You can save time by producing one book, and then changing variables for the company name, logo, and so on, to make personalized versions of the content.
When variables are used in topics, their names appear between <
View a full list of the variables available in the library from Files Manage Variables, or use the variables options in the Library Explorer or the Editor ribbon bar.
Use variable values at the default, or library level for general use, or specifically assign values at the object level. When you publish the book, the variable values are resolved and used in the content. The order of precedence for resolving values is topic object followed by book object; if there are no assignments, the default value is used.