what is the meaning of a glycosidic C-1 to C-4 linkage?

Question

Since this is not my area of expertise, I searched Google under the key words "glycosidic C-1 to C-4 linkage" to get these possible sources:

http://scholar.google.com/scholar?q=glycosidic+C-1+to+C-4+linkage&hl=en&client=safari&rls=en&um=1&oi=scholart
http://en.wikipedia.org/wiki/Glycosidic_bond
http://dl.clackamas.edu/ch106-07/disaccha.htm

I hope this helps. Thanks for asking.