Juyoung Kang 0001 Jae Kyu Lee Extraction of Structured Rules from Web Pages and Maintenance of Mutual Consistency: XRML Approach. 150-163 https://doi.org/10.1007/978-3-540-39715-1_11 2003 conf/semweb/2003ruleml RuleML db/conf/semweb/ruleml2003.html#KangL03