How to reference another table in the Power BI query editor

Is it possible to reference another table using M in Power BI?

I have a list of files in TableA and want to compare the data with a list in TableB.

I have done this in DAX by using related and was wondering does M have a similar function?

= SEARCH(related(keywords[keyword]),main[text],1,0)

Solution

I struggled to find this information too.

This is a snippet from a Power Query 'Advanced Editor' where I'm reading a minimum date from another table into a variable.

let
    Source = #date(2015, 1, 1),
    MinDate = List.Min(TableName[Date]),
...

Hopefully List is what you're looking for.