Learning of Finite Unions of Tree Patterns with Internal Structured Variables from Queries

S. MATSUMOTO, T. SHOUDAI, T. UCHIDA, T. MIYAHARA, Y. SUZUKI
2008 IEICE transactions on information and systems  
doi:10.1093/ietisy/e91-d.2.222 fatcat:6r2bja6ndvh6vfup3ifdhbqxbq