@techreport{f-stcca-03, author = {Efi Fogel and Dan Halperin and Ron Wein and Monique Teillaud and Eric Berberich and Arno Eigenwillig and Susan Hert and Lutz Kettner}, title = {Specification of the traits classes for {C}{\sc gal}'s arrangements of curves.}, type = {Technical {Report}}, number = {ECG-TR-241200-01}, institution = {INRIA Sophia-Antipolis}, year = {2003} }