adammark/Markup.js — pull request #28 by csetea (2014-05-14 16:51:10+00:00)
Title: Customization options:  undefinedResult provider '???', pipeNotFound handler

It is confusing to become '???' as default result if value not found in context.
My use case scenario is the next:
I process templates in more steps to generate UI and documents e.g.:

preprocessing:
1. include other templates
2. replace message placeholders (i18n)
3. cache the preprocessed tempalte

fill with model values
4. fill the templates with model values

PS: Mark.up rocks!