In the same way as a simple Text Block, a Rich Text Block is a component of a model document. Running a model for example works the same for Rich Text Blocks as for simple Text Blocks.
A Rich Text Block is typically meant to produce content with a complex layout that cannot be provided by the simple Text Block Editor. With Rich Text Blocks you can prepare content in multiple styles and structured in tables or text boxes, which can be inserted in a complex document.
Note
You need at least version 3.5.4 of ITP/Server to run models using Rich Text Blocks.
Note
For Rich Text Blocks to be editable for the end user (in Forms or Content Wizards), you need least beta release version 3.5.20 of ITP/Server and ITP/OnLine.