Hi, most of this is shorthand for either several functions or functions with longer names. For example, [rs:10;\s] is the same as [rep:10][sep:\s].

The last example is used to synchronize results between dictionary queries. This particular one is short for "output the same word as any other query to this table with the match ID 'a'."

In retrospect it was a poor decision to use shorthand forms in prominent example snippets, and I'll consider revising them.