Some(?) scripts don't read from stdin?

[Fil]

textkit text2words text.txt ok textkit text2words < text.txt NOK cat text.txt | textkit text2words NOK

It's not always obvious how to use commands, as some expect file names, other accept streams, etc. The documentation is not explicit on this point: "With no file passed in, many textkit commands default to standard in. This can be indicated explicitly by using a dash (-) to indicate standard in."

(I haven't found how to use text2words on STDIN.)

[Fil]

another example is that tokens2json does not work like tokens2counts