TY - GEN N2 - We present two approaches to time expression identification, as entered in to SemEval2015 Task 6, Clinical TempEval. The first is a comprehensive rule-based approach that favoured recall, and which achieved the best recall for time expression identification in Clinical TempEval. The second is an SVM-based system built using readily available components, which was able to achieve a competitive F1 in a short development time. We discuss how the two approaches perform relative to each other, and how characteristics of the corpus affect the suitability of different approaches and their outcomes. ID - discovery10065714 UR - https://doi.org/10.18653/v1/S15-2141 PB - Association for Computational Linguistics CY - Denver, Colorado A1 - Tissot, H A1 - Gorrell, G A1 - Roberts, A A1 - Derczynski, L A1 - Fabro, MDD T3 - International Workshop on Semantic Evaluation (SemEval 2015) TI - UFPRSheffield: Contrasting Rule-based and Support Vector Machine Approaches to Time Expression Identification in Clinical TempEval AV - public SP - 835 Y1 - 2015/06// EP - 839 N1 - Licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 International License. Permission is granted to make copies for the purposes of teaching and research. Materials published in or after 2016 are licensed on a Creative Commons Attribution 4.0 International License. ER -