You can register a custom formatter factory to support formatting needs not covered by the currently available formatters.
<UIElement type="label"> <P pid="width" value="75%" /> <P pid="margin_bottom" value="5%" /> <P pid="halign" value="center" /> <!—Define a Custom Formatter --> <Format type="MyFormatter" pattern="MyPattern" platform="Android"> <!—Define a Custom Formatter API --> <P pid="InputString" value="custom Formatter" /> </Format> </UIElement>For implementation details, check the MAFExtensibilityFormatterSample sample app (see Sample Applications).