Meta keyword documentation?

Can anyone point me to documentation about Power Query's meta keyword?

In fact, can anyone point me to documentation about PQ's keywords in general?

Hey Charley,

All the M documentation is here: https://msdn.microsoft.com/en-us/query-bi/m/power-query-m-reference

Admittedly, the Meta article is short and pretty darned weak. May be something in the language specs though...

Ken,

This morning, I was trying to understand the code that's automatically generated by Data, Get Data, From File, From Folder, Combine & Edit. Because "meta" is used in several different contexts, I was hoping that documentation about the "meta" keyword would help. But it doesn't.

Also, as I discovered this morning, the documentation for Excel.Workbook fails to define the delayTypes argument.

I headed down this path because I tried to define a parameter to contain the path to the parent folder used in the generated code; but the code wouldn't accept my parameter and I didn't understand the reason for that.

Therefore, I wrote my own my own code to consolidate the files in a folder. This was just as well, because I could add features that that the generated code doesn't support.

Even so, if you actually understand the Combine & Edit version of the From Folder query, that would make an interesting blog post.

Thanks!

Charley