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| {{head|Use cases}}
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| In this page you learn what is a '''use case''' and find a list of {{rml}} use cases.
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| While the emphasis of the {{rml}}-wiki lies in documenting single elements in a bottom-up approach, we also try to help users to capture the concepts of {{rml}} via [[Dev:Examples|examples]] and use cases in a top down approach.
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| ==What is a use case?==
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| <div id="t*"></div>A use case can be defined as ''a single task, performed by the end user of a system, that has some useful outcome''[[#*|*]]. It is described as a list of steps (actions or events) to achieve this outcome.
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| A use case in terms of {{rml}} is an application of data exchange between at least two IT systems in the railway domain, where {{rml}} can be used as a format and language for the data to be exchanged. The aim of the use case description is to formulate requirements on the technical implementation of the data exchange.
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| What distinguishes a use case from an example is, that examples will typically consist of pieces of {{rml}}-code, whereas use cases will typically be formulated in natural language or ''Unified Modelling Language'' (UML). Examples are solutions to use cases.
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| =={{rml}} Use Cases==
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| ===By category===
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| [[:category:Use case (CO)|CO Use Cases]] – [[:category:Use case (IL)|IL Use Cases]] – [[:category:Use case (IS)|IS Use Cases]] – [[:category:Use case (RS)|RS Use Cases]] – [[:category:Use case (TT)|TT Use Cases]] – [[:Category:Use cases by company]]
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| ===List===
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| [[UC:Use cases/table|View/edit list on the separate source page]].
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| {{:UC:Use cases/table}}
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| ===How to interpret the status===
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| <div style="writing-mode: tb-rl;"></div>
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| {|class="wikitable"
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| !rowspan=2| !!Status!!Description!!colspan=5|participation
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| ! !! !!<div style="writing-mode: tb-rl;font-size:70%">{{rml}} community</div>!!<div style="writing-mode: tb-rl;font-size:70%">reporting party</div>!!<div style="writing-mode: tb-rl;font-size:70%">{{rml}} scheme coordinator</div>!!<div style="writing-mode: tb-rl;font-size:70%">{{rml}} governance board</div>!!<div style="writing-mode: tb-rl;font-size:70%">{{rml}} scheme development group</div>
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| |-
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| |rowspan=3|<div style="writing-mode: tb-rl;font-size:70%">'''pre development'''</div>||''planned''
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| |the use case is planned, but there is no draft available by now; usually there will be no article about this use case in the wiki; Sometimes some basic ideas will be published
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| |style="text-align:center;"|×
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| |''draft''
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| |a user has submitted a draft. Usually there will exist an article about the use case where you find the draft
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| |style="text-align:center;"|☒
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| |''consolidated''
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| |the draft has been reviewed and accepted by the scheme coordinator
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| |style="text-align:center;"|×
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| |style="text-align:center;"|×
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| |style="text-align:center;"|☒
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| |style="text-align:center;"|×
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| |-
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| |rowspan=3|<div style="writing-mode: tb-rl;font-size:70%">'''development phase'''</div>||''requirements''
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| |the '''development phase''' begins with an assessment, if and how the {{rml}} schema has to be refined as to depict the use case
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| |style="text-align:center;"|×
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| |style="text-align:center;"|☒
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| |style="text-align:center;"|×
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| |''model''
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| |the requirements of this use case have been implemented into the currant {{rml}} schema
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| |style="text-align:center;"|☒
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| |style="text-align:center;"|×
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| |''finished''
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| |the use case has been completely implemented, documented and released
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| |style="text-align:center;"|×
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| |style="text-align:center;"|☒
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| |-
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| |''postponed''
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| |if an unfinished use case is not being barried further for several months, it will be listed as postponed
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| |style="text-align:center;"|☒
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| |-
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| !colspan="8"|×=participates — ☒=is responsible
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| |}
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| ==How to contribute a use case==
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| Generally speaking, contributions to {{rml}} and this wiki are appreciated. For contributing use cases, please follow our [[dev:Use cases|UC guideline]].
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| ==References==
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| <div id="*">[[#t*|*]] {{external|http://www.engr.sjsu.edu/fayad/current.courses/cmpe202-Fall2009/docs/lecture2/CmpE202-Use-Cases-3.pdf}}</div>
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