Induction of one-level decision trees
ML92 Proceedings of the ninth international workshop on Machine learning
Fast discovery of association rules
Advances in knowledge discovery and data mining
Providing database-like access to the Web using queries based on textual similarity
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Context-sensitive learning methods for text categorization
ACM Transactions on Information Systems (TOIS)
Using LSI for text classification in the presence of background text
Proceedings of the tenth international conference on Information and knowledge management
Machine learning in automated text categorization
ACM Computing Surveys (CSUR)
A Memory-Based Approach to Anti-Spam Filtering for Mailing Lists
Information Retrieval
A Comparative Study on Feature Selection in Text Categorization
ICML '97 Proceedings of the Fourteenth International Conference on Machine Learning
Filters, Wrappers and a Boosting-Based Hybrid for Feature Selection
ICML '01 Proceedings of the Eighteenth International Conference on Machine Learning
Defining Knowledge Layers for Textual Case-Based Reasoning
EWCBR '98 Proceedings of the 4th European Workshop on Advances in Case-Based Reasoning
Bootstrapping Case Base Development with Annotated Case Summaries
ICCBR '99 Proceedings of the Third International Conference on Case-Based Reasoning and Development
Learning from little: comparison of classifiers given little training
PKDD '04 Proceedings of the 8th European Conference on Principles and Practice of Knowledge Discovery in Databases
Mining soft-matching rules from textual data
IJCAI'01 Proceedings of the 17th international joint conference on Artificial intelligence - Volume 2
Acquiring Word Similarities with Higher Order Association Mining
ICCBR '07 Proceedings of the 7th international conference on Case-Based Reasoning: Case-Based Reasoning Research and Development
ICCBR '07 Proceedings of the 7th international conference on Case-Based Reasoning: Case-Based Reasoning Research and Development
Visualizing and Evaluating Complexity of Textual Case Bases
ECCBR '08 Proceedings of the 9th European conference on Advances in Case-Based Reasoning
ICCBR '09 Proceedings of the 8th International Conference on Case-Based Reasoning: Case-Based Reasoning Research and Development
Unsupervised feature selection for text data
ECCBR'06 Proceedings of the 8th European conference on Advances in Case-Based Reasoning
Introspective knowledge revision in textual case-based reasoning
ICCBR'10 Proceedings of the 18th international conference on Case-Based Reasoning Research and Development
Taxonomic semantic indexing for textual case-based reasoning
ICCBR'10 Proceedings of the 18th international conference on Case-Based Reasoning Research and Development
Selective integration of background knowledge in TCBR systems
ICCBR'11 Proceedings of the 19th international conference on Case-Based Reasoning Research and Development
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Problem solving with experiences that are recorded in text form requires a mapping from text to structured cases, so that case comparison can provide informed feedback for reasoning. One of the challenges is to acquire an indexing vocabulary to describe cases. We explore the use of machine learning and statistical techniques to automate aspects of this acquisition task. A propositional semantic indexing tool, Psi, which forms its indexing vocabulary from new features extracted as logical combinations of existing keywords, is presented. We propose that such logical combinations correspond more closely to natural concepts and are more transparent than linear combinations. Experiments show Psi-derived case representations to have superior retrieval performance to the original keyword-based representations. Psi also has comparable performance to Latent Semantic Indexing, a popular dimensionality reduction technique for text, which unlike Psi generates linear combinations of the original features.