GroupDocs.Assembly Product Family includes document generation APIs. They are document automation and reports generation APIs designed to create custom documents from templates. It supports different elements such as Text or HTML Blocks, Repeated and Conditional Blocks, Images, Charts etc that can be added to document templates which allow developers to create rich documents as per their custom requirements. Every template element has its own formatting properties like Text formatting, Chart formatting, numeric value formatting and more. It includes components for .NET and Java.