Hydrolyzes xylooligosaccharides with a degree of polymerization of greater than or equal to 3, releasing xylose from the reducing end. Only hydrolyzes the beta anomers of xylooligosaccharides, with inversion of anomeric configuration. Hydrolyzes the glucose and xylose-based trisaccharides where xylose is located at the -1 subsite, GXX, XXG and GXG. Does not hydrolyze xylan, chitosan, lichenan, curdlan or carboxymethylcellulose. Hydrolysis of (1->4)-beta-D-xylose residues from the reducing end of oligosaccharides. Optimum pH is 6.2-7.3. Stable between pH 5.0 and 9.8 for 30 min at 30 degrees Celsius. Optimum temperature is 50 degrees Celsius. Stable up to 40 degrees Celsius. Belongs to the glycosyl hydrolase 8 (cellulase D) family.