Embedment Helper
An object that minimizes code in a templating system by providing all needed functions to that templating mechanism.
Many systems allow you to extend the capability of a simple representation by embedding general-purpose code into that representation to do things that otherwise would not be possible. Examples include embedding code into web page templates, putting code actions into grammar files, and putting callouts into code generation templates. This mechanism of general-purpose Foreign Code adds a lot of power to the representation it's embedded into, without complicatingthe basic representation itself. However, a common problem when you do this is that the Foreign Code can end up being quite involved and obscure the representation that it's embedded into.
Embedment Helper moves all the complex code to a helper class, leaving only simple method calls in the host representation. This allows the host representation to be dominant and retain its clarity.
For more details see chapter 54 of the DSL book