Linear text is accessible
for those who are familiar with its systems of signalling
structure.
It is more accessible
for those with background knowledge of the topic
within.
The non-native reader is not so familiar with
structure signals in the second language. And background
knowledge may be lacking too.
When it comes to hypertext such as web text,
which is not linear like continuous text,
there are fewer within-text signals
since terms like "above" and even "therefore"
are often rendered useless when they span web pages
rather than bound pages.
But hypertext, web pages, here is a medium
where empty space is virtually free.
We are at the beginning of the development of this
medium
and we need to learn how to give structure signal
support
to the reader, especially the non-native reader.