--- abstract: 'Event-B is a formal method for system-level modelling and analysis. Key features of Event-B are the use of set theory as a modelling notation, the use of refinement to represent systems at different abstraction levels and the use of mathematical proof to verify consistency between refinement levels. In this article we present the Rodin modelling tool that seamlessly integrates modelling and proving. We outline how the Event-B language was designed to facilitate proof and how the tool has been designed to support changes to models while minimising the impact of changes on existing proofs. We outline the important features of the prover architecture and explain how well-definedness is treated. The tool is extensible and configurable so that it can be adapted more easily to different application domains and development methods. ' accompaniment: [] book_title: ~ commentary: ~ completion_time: ~ composition_type: ~ conductors_id: [] conductors_name: [] contact_email: ~ copyright_holders: [] corp_creators: [] creators_id: [] creators_name: - family: Abrial given: Jean-Raymond honourific: '' lineage: '' - family: Butler given: Michael honourific: '' lineage: '' - family: Hallerstede given: Stefan honourific: '' lineage: '' - family: Hoang given: Thai Son honourific: '' lineage: '' - family: Mehta given: Farhad honourific: '' lineage: '' - family: Voisin given: Laurent honourific: '' lineage: '' data_type: ~ date: 2010-04 date_type: ~ datestamp: 2010-12-22 15:10:08 department: ~ dir: disk0/00/00/02/67 divisions: [] edit_lock_since: ~ edit_lock_until: 0 edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 267 event_dates: ~ event_location: ~ event_title: ~ event_type: ~ exhibitors_id: [] exhibitors_name: [] fileinfo: '' full_text_status: none funders: [] id_number: ~ importid: ~ institution: ~ isbn: ~ ispublished: pub issn: ~ item_issues_comment: [] item_issues_count: 0 item_issues_description: [] item_issues_id: [] item_issues_reported_by: [] item_issues_resolved_by: [] item_issues_status: [] item_issues_timestamp: [] item_issues_type: [] keywords: ~ lastmod: 2010-12-22 15:10:08 latitude: ~ learning_level: ~ longitude: ~ lyricists_id: [] lyricists_name: [] metadata_visibility: show monograph_type: ~ note: ~ num_pieces: ~ number: ~ official_url: http://eprints.ecs.soton.ac.uk/21058/ output_media: ~ pagerange: ~ pages: ~ patent_applicant: ~ pedagogic_type: ~ place_of_pub: ~ pres_type: ~ producers_id: [] producers_name: [] projects: [] publication: International Journal on Software Tools for Technology Transfer (STTT) publisher: Springer refereed: TRUE referencetext: ~ related_url_type: [] related_url_url: [] relation_type: [] relation_uri: [] rev_number: 8 series: ~ skill_areas: [] source: ~ status_changed: 2010-12-22 15:10:08 subjects: - Event-Bsemantics - deploy_tooldev succeeds: ~ suggestions: ~ sword_depositor: ~ sword_slug: ~ task_purpose: ~ thesis_type: ~ title: 'Rodin: An Open Toolset for Modelling and Reasoning in Event-B' type: article userid: 1 volume: ~