Welcome to Emboss, the Embedded Systems Binary Structure Tool.
If you are new to Emboss, a good place to start would be the User Guide.
The C++ User Guide has an (incomplete) explanation of the generated C++ code.
Details of the Emboss language can be found in the Emboss Language Reference.
A reference to the C++ code that Emboss generates can be found in the Emboss C++ Generated Code Reference.
Details of the textual representation Emboss uses for structures can be found in the Emboss Text Format Reference.
There is a tentative roadmap of future development.