---
abstract: "UML-B is a ’UML-like’ graphical front end for Event-B. It adds support for object oriented modeling concepts while visually retaining the Event-B\r\nmodeling concepts. In the continuity of the work on UML-B, we strengthen its\r\nrefinement concepts. Development in Event-B is done through refinements of an\r\nabstract model. Since Event-B is reflected in UML-B, the abstraction-refinement\r\nconcepts must also be catered for in UML-B. UML-B introduced the new concept of refinement, where model complexity is managed by introducing more\r\ndetailed versions of a machine. We extend this refinement concept by introducing\r\nthe notion of refined classes and refined state machines. A refined class is one that\r\nrefines a more abstract class and a refined state machine is one that refines a more\r\nabstract state machine. The UML-B drawing tool and Event-B translator are extended to support the refinement concepts. A case study of an auto teller machine\r\n(ATM) is presented to demonstrate the notion of refined classes and refined state\r\nmachines."
accompaniment: []
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creators_name:
  - family: Said
    given: Mar Yah
    honourific: ''
    lineage: ''
  - family: Butler
    given: Michael
    honourific: ''
    lineage: ''
  - family: Snook
    given: Colin
    honourific: ''
    lineage: ''
data_type: ~
date: 2009-02
date_type: published
datestamp: 2012-07-23 11:02:33
department: ~
dir: disk0/00/00/04/33
divisions: []
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eprint_status: archive
eprintid: 433
event_dates: ~
event_location: ~
event_title: ' Integration of Model-based Formal Methods and Tools (workshop at iFM 2009)'
event_type: workshop
exhibitors_id: []
exhibitors_name: []
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full_text_status: none
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ispublished: pub
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keywords: ~
lastmod: 2012-07-23 11:02:33
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metadata_visibility: show
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official_url: http://eprints.soton.ac.uk/267133/
output_media: ~
pagerange: ~
pages: ~
patent_applicant: ~
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pres_type: paper
producers_id: []
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publication: ~
publisher: ~
refereed: TRUE
referencetext: ~
related_url_type: []
related_url_url: []
relation_type: []
relation_uri: []
rev_number: 7
series: ~
skill_areas: []
source: ~
status_changed: 2012-07-23 11:02:33
subjects:
  - Refinement
  - deploy_method_other
succeeds: ~
suggestions: ~
sword_depositor: ~
sword_slug: ~
task_purpose: ~
thesis_type: ~
title: 'Class and State Machine Refinement in UML-B '
type: conference_item
userid: 258
volume: ~
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