<div class="chartlet-wrapper"><style>.chartlet-stage{position:relative;display:inline-block;max-width:100%;vertical-align:top}.chartlet-stage>svg{display:block}.chartlet-hotspot{position:absolute;border-radius:8px;cursor:pointer}.chartlet-focus{margin:0 0 12px 0;font-size:13px}.chartlet-focus summary{cursor:pointer;min-height:24px}.chartlet-focus fieldset{border:none;padding:0;margin:4px 0 0 0}.chartlet-focus label{display:inline-flex;align-items:center;min-height:44px;margin-right:14px;cursor:pointer;white-space:nowrap}.chartlet-focus input{margin-right:4px}.chartlet-focus input:focus-visible{outline:2px solid #2563eb;outline-offset:2px}.chartlet-wrapper:has(.chartlet-focus-node:checked) #chartlet-9727cba18ffc3248 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.chartlet-flow-node,.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-3:checked) #chartlet-9727cba18ffc3248 .chartlet-n-3 .chartlet-seq-box{stroke-width:3}.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-4:checked) #chartlet-9727cba18ffc3248 .chartlet-f-4{opacity:1}.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-4:checked) #chartlet-9727cba18ffc3248 .chartlet-n-4 .chartlet-flow-node,.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-4:checked) #chartlet-9727cba18ffc3248 .chartlet-n-4 .chartlet-seq-box{stroke-width:3}.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-5:checked) #chartlet-9727cba18ffc3248 .chartlet-f-5{opacity:1}.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-5:checked) #chartlet-9727cba18ffc3248 .chartlet-n-5 .chartlet-flow-node,.chartlet-wrapper:has(#chartlet-9727cba18ffc3248-focus-5:checked) #chartlet-9727cba18ffc3248 .chartlet-n-5 .chartlet-seq-box{stroke-width:3}</style><details class="chartlet-focus"><summary>Focus</summary><fieldset><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" checked> Show all</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-0"> Learner</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-1"> Trainer</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-2"> Course booking</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-3"> Payment provider</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-4"> E-mail service</label><label><input type="radio" name="chartlet-9727cba18ffc3248-focus" class="chartlet-focus-node" id="chartlet-9727cba18ffc3248-focus-5"> Staff directory</label></fieldset></details><figure class="chartlet-figure" data-viz="chart"><figcaption>Course booking: system context</figcaption><div class="chartlet-stage"><svg xmlns="http://www.w3.org/2000/svg" width="800" height="480" viewBox="0 0 800 480" id="chartlet-9727cba18ffc3248" role="img" aria-labelledby="chartlet-9727cba18ffc3248-title chartlet-9727cba18ffc3248-description" class="chartlet-root"><title id="chartlet-9727cba18ffc3248-title">Course booking: system context</title><desc id="chartlet-9727cba18ffc3248-description">Architecture diagram with 6 components and 5 connections. Main path: Learner → Course booking → Payment provider. Most connected: Course booking (5 connections). Nothing leads into Learner and Trainer. Nothing leads out of Payment provider, E-mail service and Staff directory. Learner (person): connects to Course booking (books a course). Trainer (person): connects to Course booking (plans dates). Course booking (service): connects to Payment provider (takes payment), E-mail service (sends confirmations) and Staff directory (looks up trainers). Payment provider (external system): no outgoing connection. E-mail service (external system): no outgoing connection. Staff directory (external system): no outgoing connection.</desc><style>.chartlet-root{--chartlet-text:#172033;--chartlet-muted:#344054;--chartlet-grid:#d9dee8;--chartlet-zero:#667085;--chartlet-accent:#2563eb;--chartlet-background:#fff;--chartlet-color-1:#2563eb;--chartlet-color-2:#c2410c;--chartlet-color-3:#475569;--chartlet-color-4:#111827;max-width:100%;height:auto;font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:var(--chartlet-text)}#chartlet-9727cba18ffc3248 .chartlet-title{font-size:22px;font-weight:650;fill:var(--chartlet-text)}#chartlet-9727cba18ffc3248 .chartlet-label,#chartlet-9727cba18ffc3248 .chartlet-tick,#chartlet-9727cba18ffc3248 .chartlet-value,#chartlet-9727cba18ffc3248 .chartlet-value-inverse,#chartlet-9727cba18ffc3248 .chartlet-axis-title{font-size:12px;fill:var(--chartlet-muted)}#chartlet-9727cba18ffc3248 .chartlet-value,#chartlet-9727cba18ffc3248 .chartlet-value-inverse{font-weight:600}#chartlet-9727cba18ffc3248 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.chartlet-flow-lane-alt{fill:var(--chartlet-background)}#chartlet-9727cba18ffc3248 .chartlet-flow-lane-head{fill:var(--chartlet-lane-head);stroke:none}#chartlet-9727cba18ffc3248 .chartlet-flow-lane-label{font-size:11px;font-weight:650;fill:var(--chartlet-muted);letter-spacing:.04em}#chartlet-9727cba18ffc3248 .chartlet-flow-group{fill:var(--chartlet-accent);fill-opacity:.04;stroke:var(--chartlet-zero);stroke-width:1;stroke-dasharray:4 3;rx:10px}#chartlet-9727cba18ffc3248 .chartlet-flow-group-label{font-size:11px;font-weight:600;fill:var(--chartlet-muted)}#chartlet-9727cba18ffc3248 .chartlet-arch-head{fill:var(--chartlet-role-violet-fill);stroke:var(--chartlet-role-violet);stroke-width:1.5}#chartlet-9727cba18ffc3248 .chartlet-arch-dot{fill:var(--chartlet-role-blue);stroke:none}</style><g class="chartlet-f chartlet-f-0 chartlet-f-2"><polyline points="263.805,80 263.805,171.98" class="chartlet-flow-edge chartlet-flow-main"><title>Learner → Course booking: books a course</title></polyline><polyline points="260.305,171.98 263.805,179.98 267.305,171.98 260.305,171.98" class="chartlet-flow-head chartlet-flow-main-head"/></g><g class="chartlet-f chartlet-f-1 chartlet-f-2"><polyline points="428.845,80 428.845,145.204 287.805,145.204 287.805,171.98" class="chartlet-flow-edge"><title>Trainer → Course booking: plans dates</title></polyline><polyline points="284.305,171.98 287.805,179.98 291.305,171.98 284.305,171.98" class="chartlet-flow-head"/></g><g class="chartlet-f chartlet-f-2 chartlet-f-3"><polyline points="263.805,229.98 263.805,406" class="chartlet-flow-edge chartlet-flow-main"><title>Course booking → Payment provider: takes payment</title></polyline><polyline points="260.305,406 263.805,414 267.305,406 260.305,406" class="chartlet-flow-head chartlet-flow-main-head"/></g><g class="chartlet-f chartlet-f-2 chartlet-f-4"><polyline points="287.805,229.98 287.805,379.224 420.975,379.224 420.975,406" class="chartlet-flow-edge"><title>Course booking → E-mail service: sends confirmations</title></polyline><polyline points="417.475,406 420.975,414 424.475,406 417.475,406" class="chartlet-flow-head"/></g><g class="chartlet-f chartlet-f-2 chartlet-f-5"><polyline points="311.805,229.98 311.805,364.735 572.295,364.735 572.295,406" class="chartlet-flow-edge"><title>Course booking → Staff directory: looks up trainers</title></polyline><polyline points="568.795,406 572.295,414 575.795,406 568.795,406" class="chartlet-flow-head"/></g><g class="chartlet-f chartlet-n-0 chartlet-f-0 chartlet-f-2"></g><g class="chartlet-f chartlet-n-1 chartlet-f-1 chartlet-f-2"></g><g class="chartlet-f chartlet-n-2 chartlet-f-0 chartlet-f-1 chartlet-f-2 chartlet-f-3 chartlet-f-4 chartlet-f-5"></g><g class="chartlet-f chartlet-n-3 chartlet-f-2 chartlet-f-3"></g><g class="chartlet-f chartlet-n-4 chartlet-f-2 chartlet-f-4"></g><g class="chartlet-f chartlet-n-5 chartlet-f-2 chartlet-f-5"></g><g class="chartlet-f chartlet-f-0 chartlet-f-2"><rect x="267.805" y="85" width="98.32" height="21" class="chartlet-diagram-chip"/><text x="272.805" y="99" text-anchor="start" class="chartlet-diagram-chip-text">books a course</text></g><g class="chartlet-f chartlet-f-1 chartlet-f-2"><rect x="432.845" y="85" width="77.92" height="21" class="chartlet-diagram-chip"/><text x="437.845" y="99" text-anchor="start" class="chartlet-diagram-chip-text">plans dates</text></g><g class="chartlet-f chartlet-f-2 chartlet-f-3"><rect x="161.245" y="234.98" width="98.56" height="21" class="chartlet-diagram-chip"/><text x="254.805" y="248.98" text-anchor="end" class="chartlet-diagram-chip-text">takes payment</text></g><g class="chartlet-f chartlet-f-2 chartlet-f-4"><rect x="288.07" y="383.224" width="132.64" height="21" class="chartlet-diagram-chip"/><text x="354.39" y="397.224" text-anchor="middle" class="chartlet-diagram-chip-text">sends confirmations</text></g><g class="chartlet-f chartlet-f-2 chartlet-f-5"><rect x="315.805" y="234.98" width="112.24" height="21" class="chartlet-diagram-chip"/><text x="320.805" y="248.98" text-anchor="start" class="chartlet-diagram-chip-text">looks up trainers</text></g><g class="chartlet-f chartlet-n-0 chartlet-f-0 chartlet-f-2"><rect x="178.765" y="14.5" width="170.08" height="68" class="chartlet-diagram-shadow"/><rect x="178.765" y="12" width="170.08" height="68" class="chartlet-flow-node chartlet-role-violet"><title>Learner – books and attends courses</title></rect><circle cx="263.805" cy="23" r="6" class="chartlet-arch-head"/><text x="263.805" y="51.5" text-anchor="middle" class="chartlet-flow-label">Learner</text><text x="263.805" y="65.5" text-anchor="middle" class="chartlet-flow-sublabel">books and attends courses</text></g><g class="chartlet-f chartlet-n-1 chartlet-f-1 chartlet-f-2"><rect x="376.845" y="14.5" width="104" height="68" class="chartlet-diagram-shadow"/><rect x="376.845" y="12" width="104" height="68" class="chartlet-flow-node chartlet-role-violet"><title>Trainer – runs courses</title></rect><circle cx="428.845" cy="23" r="6" class="chartlet-arch-head"/><text x="428.845" y="51.5" text-anchor="middle" class="chartlet-flow-label">Trainer</text><text x="428.845" y="65.5" text-anchor="middle" class="chartlet-flow-sublabel">runs courses</text></g><g class="chartlet-f chartlet-n-2 chartlet-f-0 chartlet-f-1 chartlet-f-2 chartlet-f-3 chartlet-f-4 chartlet-f-5"><rect x="196.805" y="182.48" width="134" height="50" class="chartlet-diagram-shadow"/><rect x="196.805" y="179.98" width="134" height="50" class="chartlet-flow-node chartlet-role-blue"><title>Course booking – the system in scope</title></rect><text x="263.805" y="202.48" text-anchor="middle" class="chartlet-flow-label">Course booking</text><text x="263.805" y="216.48" text-anchor="middle" class="chartlet-flow-sublabel">the system in scope</text></g><g class="chartlet-f chartlet-n-3 chartlet-f-2 chartlet-f-3"><rect x="193.89" y="416.5" width="139.83" height="50" class="chartlet-diagram-shadow"/><rect x="193.89" y="414" width="139.83" height="50" class="chartlet-flow-node chartlet-flow-external chartlet-role-gray"><title>Payment provider – external system</title></rect><text x="263.805" y="436.5" text-anchor="middle" class="chartlet-flow-label">Payment provider</text><text x="263.805" y="450.5" text-anchor="middle" class="chartlet-flow-sublabel">external system</text></g><g class="chartlet-f chartlet-n-4 chartlet-f-2 chartlet-f-4"><rect x="361.72" y="416.5" width="118.51" height="50" class="chartlet-diagram-shadow"/><rect x="361.72" y="414" width="118.51" height="50" class="chartlet-flow-node chartlet-flow-external chartlet-role-gray"><title>E-mail service – external system</title></rect><text x="420.975" y="436.5" text-anchor="middle" class="chartlet-flow-label">E-mail service</text><text x="420.975" y="450.5" text-anchor="middle" class="chartlet-flow-sublabel">external system</text></g><g class="chartlet-f chartlet-n-5 chartlet-f-2 chartlet-f-5"><rect x="508.23" y="416.5" width="128.13" height="50" class="chartlet-diagram-shadow"/><rect x="508.23" y="414" width="128.13" height="50" class="chartlet-flow-node chartlet-flow-external chartlet-role-gray"><title>Staff directory – external system</title></rect><text x="572.295" y="436.5" text-anchor="middle" class="chartlet-flow-label">Staff directory</text><text x="572.295" y="450.5" text-anchor="middle" class="chartlet-flow-sublabel">external system</text></g></svg><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-0" for="chartlet-9727cba18ffc3248-focus-0"></label><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-1" for="chartlet-9727cba18ffc3248-focus-1"></label><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-2" for="chartlet-9727cba18ffc3248-focus-2"></label><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-3" for="chartlet-9727cba18ffc3248-focus-3"></label><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-4" for="chartlet-9727cba18ffc3248-focus-4"></label><label class="chartlet-hotspot" id="chartlet-9727cba18ffc3248-hs-5" for="chartlet-9727cba18ffc3248-focus-5"></label></div><details class="chartlet-data" data-viz-text><summary>Show chart data</summary><table><caption>Data for Course booking: system context</caption><thead><tr><th scope="col">Component</th><th scope="col">Kind</th><th scope="col">Connects to</th></tr></thead><tbody><tr><th scope="row">Learner</th><td>person</td><td>Course booking (books a course)</td></tr><tr><th scope="row">Trainer</th><td>person</td><td>Course booking (plans dates)</td></tr><tr><th scope="row">Course booking</th><td>service</td><td>Payment provider (takes payment), E-mail service (sends confirmations), Staff directory (looks up trainers)</td></tr><tr><th scope="row">Payment provider</th><td>external system</td><td></td></tr><tr><th scope="row">E-mail service</th><td>external system</td><td></td></tr><tr><th scope="row">Staff directory</th><td>external system</td><td></td></tr></tbody></table></details></figure></div>