Hi Everyone, I wanted to share my initial thoughts after reading the docs for the proposed Boost.Mustache. If some library docs said "I am implementing JSON", I more-less know what to expect, because JSON is popular, I used it, so one can reliably predict what the library delivers. This is not the case with Mustache. It is the first time I have heard this name. Apparently, it is a less popular thing. Therefore, I would expect some more introduction than just an external link. The linked page also doesn't contain sufficient information but further links. For instance to https://mustache.github.io/mustache.5.html, but this information also doesn't help me find answers to my questions: 1. What is considered an "optional part" of mustache? Boost.Mustache says it only implements the non-optional parts, but docs in mustache(5) do not indicate the optional parts. 2. It is clear to me that the procedure takes a template (with mustaches) and the data to be replaced. But what is the range of the acceptable formats of this data? The examples show that it is JSON, but does it have to be JSON? Boost.Mustache docs say it could be 'described' classes? But is that all? How about Boost.PropertyTree? What does the specification for Mustache say about it? 3. I do not see any specification (neither in Boost.Mustache docc, nor in the linked mustache(5)) for what is the required behavior when I have nested mustashes with the same name, or a JSON file with nested elements of the same name. Or did I miss this description? Regards, &rzej;