There are different types of holoside depending on the nature and number of monosaccharides.
If there are at least 10 monosaccharides involved, they are called oligosaccharides, if there are more they are called polysaccharides.
Heterogeneous holosides are polymers from differing monosaccharides. This is the case for mucopolysaccharides.
A macromolecule of cellulose, a holoside. © Luca Laghi, Wikimedia CC by-sa 3.0