For "Smile" branded PowerPoint or visual templates, sites like SmileTemplates offer free downloads in various formats.
The most direct reference to a "solid paper" on an XML format for SMILE is regarding . This standard was developed to allow different System Dynamics software to interchange models. Download Smile free xml
It functions similarly to HTML but for time-based media, enabling authors to build complex multimedia behavior using descriptive XML syntax. For "Smile" branded PowerPoint or visual templates, sites
"SMILE and XMILE: a common language and interchange format for system dynamics" . Download Smile free xml