This type of text has many readin paths since its the reader who decide the reading sequence, not the author of the text

It refers to traditional text that need to be read from beginning to the end

Here the reader do not have to go through the text sequentially to make sense of the text

It refes to the text that does not need to be read from beginning to the end

Here the reader makes sense of the text according to the word's grammatical and syntatic arrangemen.