1. Examine the seven positional operators for SRC and SRR. Check their correctness and compare them in terms of the preciseness of the spatial relationship representation. 2. Comment on the weighting functions for matching two spatial strings and two images. Could you propose a better way (or different way) for doing the same thing? 3. Any other comments you have on the paper. 4. Any comment on my way of teaching this course (your suggestion will be taken seriously and appreciated to improve the learning of the content of this course).