Gallery
sequence
Messages and repliesMermaid sequence syntax with solid, dashed and open-headed messages.
Authentication and retryA retry loop with an alternative success response.
Worker creation and destructionExplicit participant lifetime around a short background job.
Parallel checkout checksNested alternatives and parallel stock and payment calls.
ZenUML
Annotated interactions and symbolsNative ZenUML interactions with typed participant symbols and styled messages.
Nested calls and returnsCall nesting with explicit return messages.
Exception cleanupTyped exception sections retain their structural order.
Asynchronous service fan-outParticipant symbols distinguish a queue, worker and store.
architecture
Services, ports and connectionsNative architecture-beta with groups, services and authored port connections.
Storage service groupA small authored service group with explicit ports.
Connections at group boundariesTwo opposite connections retain their group-boundary attachment.
Nested network and junctionNested service ownership and a declared junction join.
BPMN
Process with supplied diagram geometryA BPMN XML process rendered with its supplied diagram interchange geometry.
Collaboration and message flowsPools, participants and message flows with an optional offline player.
Approval with a return routeAn automatic process with a decision and a review return.
Cross-pool request and responseA collaboration with independent buyer and seller processes.
Subprocess and boundary timeoutNested activities and a boundary timer show structural exception paths.
swimlane
Review across responsibility bandsNative Mermaid swimlane-beta with directed interactions and a return path.
Three-team escalationResponsibility bands with a review loop and an escalation.
Right-to-left handoffA reverse direction route preserves its marked endpoints.
Nested ownership and returnNested responsibility groups keep ownership and a return route.
flowchart
Mermaid request reviewMermaid flowchart with nested groups, labelled branches and a return path.
PlantUML modern order activityModern PlantUML activity syntax with an explicit partition, lanes, repeat loop and parallel branches.
PlantUML legacy request activityLegacy PlantUML activity syntax with an activity alias, partition and labelled branches.
Mermaid dispatch decisionsBranching decisions, a return path and parallel delivery targets.
PlantUML parallel preparationModern activity syntax with repeat, fork and a nested partition.
PlantUML legacy retryLegacy activity aliases, a partition and an explicit return route.
Connector comparison: elbow / bridgeSame Mermaid source. ConnectorStyle::Elbow, CrossingMode::Bridge; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
Connector comparison: elbow / plainSame Mermaid source. ConnectorStyle::Elbow, CrossingMode::Plain; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
Connector comparison: rounded / bridgeSame Mermaid source. ConnectorStyle::Rounded, CrossingMode::Bridge; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
Connector comparison: rounded / plainSame Mermaid source. ConnectorStyle::Rounded, CrossingMode::Plain; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
Connector comparison: curved / bridgeSame Mermaid source. ConnectorStyle::Curved, CrossingMode::Bridge; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
Connector comparison: curved / plainSame Mermaid source. ConnectorStyle::Curved, CrossingMode::Plain; minimum_approach=24.0, corner_radius=8.0, bridge_radius=5.0.
regex
Date pattern railroadPlantUML regex block with named groups, character sets, repetition and a negative lookahead.
Externally supplied match evidenceThe date pattern with a successful trace supplied by the frozen test trace provider.
Identifier validationAnchors and a bounded repeated character class.
Alternatives and repetitionNested alternatives and optional repeated suffixes.
Assertions and named captureA named capture, lookahead and negative assertion.
EBNF
Arithmetic grammar railroadPlantUML EBNF with recursive rule references and a note.
Externally supplied parse failureAn arithmetic grammar with failure evidence supplied by the frozen test trace provider.
Command grammarA command with a choice and an optional argument.
Recursive nested listsRecursive references describe nested list syntax.
Protocol fields and choicesOptional and repeated fields with an explicit alternative.
JSON
Nested order dataPlantUML JSON with nested collections, exact numbers and highlighted data.
API response dataNested result and pagination objects preserve scalar types.
Inventory and empty collectionsA list of records with empty object and array values.
Repeated values and exact numbersRepeated strings and large numeric tokens retain their source values.
YAML
Service configuration treePlantUML YAML with flow and block values and lists of maps.
Deployment configurationNested configuration maps with scalar and list values.
A list of servicesService maps have different nested endpoint lists.
Flow and block collectionsFlow collections and block text remain native data values.
state
Mermaid lifecycle and retryMermaid 12.2.0 state source with typed hierarchy and labelled transitions.
Mermaid composite and choiceMermaid 12.2.0 state source with typed hierarchy and labelled transitions.
Mermaid concurrency and fork/joinMermaid 12.2.0 state source with typed hierarchy and labelled transitions.
PlantUML descriptions and notesPlantUML 1.2026.9 state source with typed hierarchy and labelled transitions.
PlantUML child and boundary endpointsPlantUML 1.2026.9 state source with typed hierarchy and labelled transitions.
PlantUML concurrent regions and historyPlantUML 1.2026.9 state source with typed hierarchy and labelled transitions.