00810nas a2200157   4500000000100000000000100001000000100002008004100003100002300044700001800067245010000085300001400185490000700199520043200206022001400638       1999                            d1 aRyszard Jakubowski1 aM. Flasiński00aStructural approach to extraction and analysis of 3D features representing machining operations  a249–2720 v113 aShape languages introduced in Jakubowski, Information Sciences 39 (1986), 129-151 and 50 (1990), 35-71 are extended to an attributed model and used for a recognition of fuzzy shape features. The parsable family of ETPL (k) graph languages (Flasiński, Pattern Recognition 26 (1993), 1-16, Theoretical Computer Science 201 (1998), 189-231) is applied for a semantically-dependent analysis of solids modelled with shape features.  a0867-2121