The Binary Application Markup Language is a file format of Microsoft

Microsoft

Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

 that is generated by compiling XAML

XAML

Extensible Application Markup Language is a declarative XML-based language created by Microsoft used for initializing structured values and objects. It is available under Microsoft's Open Specification Promise...

files.

Generation

A XAML file can be compiled into a Binary Application Markup Language file having the .BAML extension.), which may be inserted as a resource into a .NET Framework assembly. At run-time, the framework engine extracts the .BAML file from assembly resources, parses it, and creates a corresponding WPF visual tree or workflow. Having this format, the content is faster loadable during runtime.