SequenceDiagram.org

https://sequencediagram.org/instructions.html
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An online editor for creating and exporting UML sequence diagrams. It supports various elements like...
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### Apply Styling to Various Participant Types

Source: https://sequencediagram.org/instructions.html/instructions

Examples of applying colors, line thickness, and styling to different participant types like actor, boundary, control, database, entity, and standard participants.

```Sequence Diagram DSL
actor #green:0.5 Actor
boundary #ff00ff:2 Boundary
control :1 Control
database #blue:1 Database #red
entity :0.5 Entity
participant :0 Participant
participant :0 "++**Participant 2**++" as p2
```

--------------------------------

### Sequence Diagram: Group Fragment

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates the 'group' fragment, which allows for custom labeling of a section within the diagram. Examples show groups with and without additional descriptive text.

```Sequence Diagram DSL
group own name
A->B:info
end
group own name [some text]
A->B:info
end
```

--------------------------------

### Sequence Diagram: Angular Boxes (Over and On Sides)

Source: https://sequencediagram.org/instructions.html/instructions

This section provides examples of creating angular-styled boxes, both spanning over participants and positioned to their left or right. It also demonstrates specific 'aboxright' and 'aboxleft' variations for directional emphasis.

```Sequence Diagram DSL
abox over A:abox over one
abox over A,B:abox over several
```

```Sequence Diagram DSL
abox left of A:abox left of
abox right of A:abox right of
```

```Sequence Diagram DSL
aboxright over A,B:This is angular boxright
aboxleft over A,B:This is angular boxleft
aboxright over A:This is angular boxright
aboxleft over B:This is angular boxleft
aboxright right of A:This is angular boxright
aboxright left of B:This is angular boxright
aboxleft right of A:This is angular boxright
aboxleft left of B:This is angular boxleft
```

--------------------------------

### Sequence Diagram: Failure Messages

Source: https://sequencediagram.org/instructions.html/instructions

This section shows how to indicate a message failure in a sequence diagram using an 'x' as the arrow head. Examples include various styles and combinations with color and delay.

```Sequence Diagram DSL
A-#redxB:failure 1
C-xB:failure 2
Bx-B:failure 3
C(5)x--A:failure 4
```

--------------------------------

### Implement Automatic Message Numbering

Source: https://sequencediagram.org/instructions.html/instructions

Details how to enable and control automatic numbering for subsequent messages in a sequence diagram using the 'autonumber' statement. It demonstrates starting numbering from a specific value and turning numbering off.

```Sequence Diagram DSL
autonumber 1
A->B:info
B->B:info
autonumber 10
C->D:info
A<-B:info
A->B:info
autonumber off
B->C:info
C->D:info
```

--------------------------------

### Specify Fonts for Sequence Diagram Text

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to change the font family for text within a sequence diagram using the 'fontfamily' keyword. Examples include specifying a custom font name or using generic browser-selected fonts like 'sans-serif' or 'mono'.

```Sequence Diagram DSL
fontfamily mono
participant A
note over A:This is mono spaces
```

--------------------------------

### Use Font Awesome 6 Icons as Participants

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to use Font Awesome 6 Solid, Regular, and Brands icons as participants, including styling and custom names.

```Sequence Diagram DSL
fontawesome6solid f48e "++**Syringe**++" as Syringe #red
fontawesome6regular f0f8 Hospital #blue
fontawesome6brands f3b6 Jenkins #green
```

--------------------------------

### Creating Participants with Messages in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section describes how to create new participants by sending a message to them, using the `participantNameA->*participantNameB: message` syntax. It also shows how to add notes over the newly created participant.

```Sequence Diagram DSL
participant A
actor X
participant B
A->B:info
B-->*C:<<create>>
note over C:do something
B<-C:info
destroy C
B->*X:message to X
note over X:do something
destroyafter X
A->B:info
```

--------------------------------

### Use Image as Participant

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to embed a PNG image as a participant using a base64 data URL. Note the size limitations and rendering behavior.

```Sequence Diagram DSL
image data:image/png;base64,iVB... png
```

--------------------------------

### Basic Text Styling in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to apply fundamental text styles such as bold, italic, small, big, monospaced, and strikethrough. It also shows combinations like big and bold, and italic and small text.

```Sequence Diagram DSL
box over A:**some bold text**
box over A://some italic text//
box over A:--some small text--
box over A:++some big text++
box over A:""some big text""
box over A:~~some big text~~
box over A:++**Big and bold\nlines of text**++\n//--italic and small--//
```

--------------------------------

### Sequence Diagram: Basic Frame

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to draw a 'frame' around the entire sequence diagram, providing a visual boundary and an overall title for the diagram.

```Sequence Diagram DSL
frame Example Diagram
A->B:info
C->A: info
note over B,C:info
```

--------------------------------

### Apply Global and Specific Entity Styling in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to apply global styling to various entity types (participants, notes, messages, dividers, boxes) using keywords like 'participantstyle' and 'notestyle'. It shows how to combine styling with text formatting and how to stop styling within entity text.

```Sequence Diagram DSL
participantstyle <color:#orange><wordwrap:25>//**
notestyle <color:#blue><wordwrap:25>//**
messagestyle <color:#green><wordwrap:25>//**
actor "Long Actor" as Actor
participant "Long test" as test
Actor->test:info info ++info++ info info info
note over Actor:info info</color> info info info info info
```

--------------------------------

### Define Participant with Multi-line and Styled Name

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to define a standard participant with a multi-line name that includes bold and italic styling.

```Sequence Diagram DSL
participant "some long\nname with **//styling//**" as participantMultiline
```

--------------------------------

### Sequence Diagram: Links in Participant Names

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to include clickable links directly within the name of a participant. This allows participants themselves to be interactive elements.

```Sequence Diagram DSL
participant "Participant with a <link:http://example.com>link</link>" as Alice
Alice->Bob:info
```

--------------------------------

### High Contrast Text with Difference Styling

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates the <difference> tag, which inverts the text color for high contrast, typically used in combination with white text on dark backgrounds.

```Sequence Diagram DSL
participantgroup #darkblue
participant AAAAAAAAAAAAAA
end
participantgroup #black
participant CCCCCCCCCCCCCC
end
AAAAAAAAAAAAAA->CCCCCCCCCCCCCC:<difference><color:#white>abcdefghijklmnopqrstuvwxy</color></difference>
```

--------------------------------

### Define Actor with Multi-line and Styled Name

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to define an actor participant with a multi-line name that includes bold and italic styling, and a custom color.

```Sequence Diagram DSL
actor "**++Big and\nbold name" as actorMultiline #red
```

--------------------------------

### Sequence Diagram: Message Types and Styling

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates various message types including synchronous, asynchronous, self-referencing, and options for customizing message line weight and color. It covers the fundamental syntax for drawing interactions between participants.

```Sequence Diagram DSL
A->B:request
A<--B:response
```

```Sequence Diagram DSL
A->>B:request
A<<--B:response
```

```Sequence Diagram DSL
A->A:self message
```

```Sequence Diagram DSL
Alice-:4>Bob:Test12345
Alice-:2>>Bob:Test
Alice-#00ff00:2>Bob:Test
Alice--#red:4>Bob:Test
Alice<<#red:3--Bob:Test
Alicex#red:3-Bob:Test
Alice-:4>(5)Bob:Test
Bob-:4>Bob:Test
Alice<-:3>Bob:Test
Alice<-#00ff00:2>Bob:Test
Alice<-#red:3>Bob:Test
```

--------------------------------

### Subscript and Superscript Text

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates the use of <sub> and <sup> tags to render text as subscript or superscript, respectively.

```Sequence Diagram DSL
A->B:Message1<sub>[1]</sub>
A->B:x<sup>40</sup>
```

--------------------------------

### Use Material Design Icon as Participant

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to use a Material Design Icon (MDI) as a participant in the diagram, identified by its unicode code point.

```Sequence Diagram DSL
materialdesignicons F1FF escalator
```

--------------------------------

### Sequence Diagram: Optional Fragment (opt)

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates the 'opt' fragment type, which encloses a sequence of messages that may or may not occur. The enclosed actions are optional based on a condition.

```Sequence Diagram DSL
opt optional
note over A:info
A->B:info
end
```

--------------------------------

### Setting Background Color for Text

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to apply a background color to text using the <background:color> tag, applicable to participant names and messages.

```Sequence Diagram DSL
participant "<background:#yellow>AAAAAAAAAA</background>" as A
participant B
A->B:<background:#yellow>background</background> no background
```

--------------------------------

### Sequence Diagram: Basic Participant Group

Source: https://sequencediagram.org/instructions.html/instructions

Explains how to define a 'participantgroup' to visually enclose a set of participants. Groups can be colored and labeled.

```Sequence Diagram DSL
participantgroup #lightgreen **Group 1**
participant A
participant B
end
participantgroup #lightblue **Long\nname**
participant C
end
B->C:info
note over A,B:info
```

--------------------------------

### Sequence Diagram: Alternative Fragment (alt)

Source: https://sequencediagram.org/instructions.html/instructions

Shows the 'alt' fragment type, used to define alternative message sequences. It supports multiple 'else' branches, each representing a different execution path.

```Sequence Diagram DSL
alt case 1
A->B:info
else case 2
A->B:info
else case 3
A->B:info
end
```

--------------------------------

### Sequence Diagram: Incoming and Outgoing Messages

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates how to represent messages that originate from outside the diagram or terminate outside the diagram using special `[` and `]` participants. This is useful for showing external interactions.

```Sequence Diagram DSL
[->A:info
B->]:info
```

--------------------------------

### Sizing Text in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to control the size of text using the <size:XX> tag, allowing for different text sizes within the same line or note.

```Sequence Diagram DSL
note over Bob:<size:20>infoinfo</size><size:10>infoinfo</size>
```

--------------------------------

### Applying Color and Complex Styling Combinations

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates the use of color tags to change text color and how to combine multiple styling options (color, bold, italic, big) within participant names and message boxes. It also shows escaping special characters like '+' in 'C++'.

```Sequence Diagram DSL
participant "Al<color:#red>ice</color>//**Long** ++name++//" as Alice
box over Alice:Com<color:#00ff00>binations:\n++**Big and bold green\nlines of text**++\n//--ital</color>ic and small--//\n++Writing C\+\+ in big text using \ to escape +++
```

--------------------------------

### Aligning Text in Notes

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to align text within notes to the left, center, or right using the <align:keyword> tag.

```Sequence Diagram DSL
note over Alice:<align:left>infoinfoinfo\ninfo</align>
note over Alice:<align:center>infoinfoinfo\ninfo</align>
note over Alice:<align:right>infoinfoinfo\ninfo</align>
```

--------------------------------

### Display Participants at Bottom of Diagram

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates the use of the `bottomparticipants` keyword to render all defined participants at the bottom of the sequence diagram, including various participant types and messages.

```Sequence Diagram DSL
bottomparticipants
participant A
participant "BBBB\nBBBB" as B
materialdesignicons f14d note
fontawesome6regular f0f8 Hospital
fontawesome6brands f3b6 Jenkins
actor Actor
A->B:info
A->note:info
A->Hospital:info
A->Jenkins:info
A->Actor:info
```

--------------------------------

### Sequence Diagram: Non-Instantaneous Messages and Spacing

Source: https://sequencediagram.org/instructions.html/instructions

This section illustrates how to create messages with a specified delay, indicating non-instantaneous communication, and how to adjust diagram spacing to accommodate them. It also shows how delays interact with participant activation and deactivation.

```Sequence Diagram DSL
participant A
participant B
participant C
A->(1)B:info
A(1)<--B:info
A(1)<-C:info
B->(5)C:info\ninfo
activate B
activate C
B(1)<--C:info
deactivate C
deactivate B
```

```Sequence Diagram DSL
Client->(5)Server:first sent message
space -6
Client->Server:later message
```

--------------------------------

### Applying Stroke Effect to Text

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to add a stroke (outline) to text using the <stroke:weight:color> tag, and how it can be combined with other styling like color, bold, and big text.

```Sequence Diagram DSL
participantgroup #gray <color:#white>Group</color>
participant A
participant B
end
A->B:<stroke:1.5:#white><color:#black>stroke text 1</color></stroke>
A->B:<stroke:1:#lightgreen><color:#white>++**stroke text 2**++</color></stroke>
```

--------------------------------

### Strikethrough Text Styling

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to apply a strikethrough effect to text using the '~~text~~' syntax, applicable to participant names and messages.

```Sequence Diagram DSL
participant "Long ~~strikethrough~~ name" as Alice
Alice->Bob:Click and ~~drag to create a request~~ or\ntype it in the source area to the left
```

--------------------------------

### Sequence Diagram: Standard Boxes (Over and On Sides)

Source: https://sequencediagram.org/instructions.html/instructions

This section illustrates how to draw standard rectangular boxes that enclose one or multiple participants or are placed to their sides. Boxes help group related elements or highlight specific sections.

```Sequence Diagram DSL
box over A:box over one
box over A,B:box over several
```

```Sequence Diagram DSL
box left of A:box left of
box right of A:box right of
```

--------------------------------

### Monospaced Text Styling

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to apply monospaced text styling using double quotes around the text.

```Sequence Diagram DSL
note over A:""This is mono spaced""
```

--------------------------------

### Sequence Diagram: Participant Group Border Styling

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to apply custom border styling to participant groups, including border color and thickness, to enhance visual distinction.

```Sequence Diagram DSL
participantgroup #lightgreen #blue:3 Name1
participant Bob1
participant Bob2
end
participantgroup #lightblue :2 Name2
participant Alice1
participant Alice2
end
participantgroup #pink :0 Name3
participant Bob3
participant Bob4
end
participantgroup :0 Name4
participant Bob5
participant Bob6
end
Bob1->Bob2:info
Alice1->Alice2:info
Bob3->Bob4:info
Bob5->Bob6:info
```

--------------------------------

### Positioning and Aligning Message Text

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to position text on messages (left, center, right) and how the 'messagestyle' keyword can set a default position for subsequent messages, which can then be overridden by individual alignment tags.

```Sequence Diagram DSL
participant AAAAAAAAAA
participant BBBBBBBBBB
participant CCCCCCCCCC
AAAAAAAAAA->CCCCCCCCCC:<position:left>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<position:center>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<position:right>info info info\ninfo
messagestyle <position:left>
AAAAAAAAAA->CCCCCCCCCC:<align:left>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:center>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:right>info info info\ninfo
messagestyle <position:center>
AAAAAAAAAA->CCCCCCCCCC:<align:left>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:center>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:right>info info info\ninfo
messagestyle <position:right>
AAAAAAAAAA->CCCCCCCCCC:<align:left>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:center>info info info\ninfo
AAAAAAAAAA->CCCCCCCCCC:<align:right>info info info\ninfo
```

--------------------------------

### Sequence Diagram: Loop Fragment

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates the 'loop' fragment type, which indicates that a sequence of messages is repeated multiple times. A condition for the loop can be specified.

```Sequence Diagram DSL
loop i < 1000
note over A:info
A->B:info
end
```

--------------------------------

### Creating and Managing References in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section explains how to create, edit, move, and delete references within a sequence diagram. References allow grouping interactions over specific participants and can be customized with text and position. New lines within reference text are created using "\n".

```Sequence Diagram DSL
A->B:info
ref over B,C:other interaction
C->D:info
```

--------------------------------

### Sequence Diagram: Expandable Fragment

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates the 'expandable' fragment, which creates a collapsible section in the diagram. It can be defined in a collapsed ('-') or expanded ('+') state.

```Sequence Diagram DSL
A->B:info1
expandable- info 1234567890
B->C:info2
C->D:info3
D->E:info4
end
E->F:info5
expandable+ info qwertyurtyuiortyuioasdfghjkwertyuio
B->C:info2
C->D:info3
D->E:info4
end
```

--------------------------------

### Managing Participant Activations and Deactivations in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section explains how to manually activate and deactivate participants using `activate participantName` and `deactivate participantName`. It covers scenarios where deactivation occurs immediately or after a space, and demonstrates a callback scenario.

```Sequence Diagram DSL
participant A
participant B
participant C
participant D
A->B:info
activate B
B->C:info
activate C
C->>D:info
activate D
B<--C:info
deactivate C
A<--B:info
deactivate B
B<-D:callback
deactivate D
activate B
A<<--B:info
deactivate B
```

--------------------------------

### Adding Comments in Sequence Diagram Source

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to add single-line comments within the sequence diagram source code. Comments can be prefixed with either '#' or '//' and are ignored by the diagram renderer.

```Diagram Source
# This is a comment
// This is also a comment
```

--------------------------------

### Participant Activation with Self-References in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates how activations behave when a participant sends a message to itself. It shows the use of `deactivateafter` to create a gap before deactivation and how to manage multiple activations.

```Sequence Diagram DSL
participant B
participant D
activate D
B->D:info
activate B
deactivateafter B
D->D:info
activate D
space
deactivate D
```

--------------------------------

### Apply Colors to Sequence Diagram Elements

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to apply colors to different elements in a sequence diagram, including participants, databases, dividers, notes, boxes, messages, activations, and fragments. Colors can be specified using HTML color names or hex codes.

```Sequence Diagram DSL
participant A#red
database B#green

participant A
participant B
participant C
participant D
==info==#lightgreen

note over A#yellow:info
rbox over A#violet:info
abox right of A#steelblue:info

A-#red>B:info
A<#green--B:info
A--#blue>>B:info

participant A
participant B
activate A #00ee77
A->B:info
activate B #red
B->B:info
activate B #lightgray
deactivateafter B

loop #ff00ff info 1234567890
B->C:info2
C->D:info3
D->E:info4
end

group #2f2e7b label text #white [condition]
A->B:info
end
loop #2f2e7b #white condition
A->B:info
end
```

--------------------------------

### Sequence Diagram: Using Spaces

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to insert spaces into a sequence diagram. Spaces can have positive or negative values to adjust the vertical positioning of subsequent elements, useful for visualizing message timing.

```Sequence Diagram DSL
participant B
participant D
activate D
B->D:info
activate B
space 3
deactivate B
D->D:info
activate D
space
deactivate D
```

--------------------------------

### Sequence Diagram: Nested Participant Groups

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to create hierarchical participant groups by nesting one 'participantgroup' within another, allowing for complex organizational structures.

```Sequence Diagram DSL
participantgroup #lightgreen **Group 1**
participantgroup #grey sub1
participant A
end
participantgroup #pink sub2
participant B
end
end
participantgroup #lightblue **Long\nname**
participant C
end
B->C:info
note over A,B:info
```

--------------------------------

### Sequence Diagram: Colored Frame

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to apply a custom color to the frame encompassing the entire diagram, allowing for visual emphasis or categorization.

```Sequence Diagram DSL
frame #red Example Diagram
A->B:info
C->A: info
note over B,C:info
```

--------------------------------

### Sequence Diagram: Links in Message Text

Source: https://sequencediagram.org/instructions.html/instructions

Explains how to embed clickable links within message text and notes. These links open in a new window when clicked in the diagram and are included in SVG exports.

```Sequence Diagram DSL
A->B:This text contains a <link:http://example.com>link</link>
note right of B:Here is <link:https://www.w3schools.com>another link</link>
```

--------------------------------

### Arrange Elements in Parallel

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to place subsequent entries at the same Y-position in a sequence diagram using the 'parallel' statement. It clarifies that this differs from linear messages as it doesn't perform intelligent matching for different entry types.

```Sequence Diagram DSL
parallel
A<<-B:info
B->C:info
note left of D:info
parallel off
C->>D:info
```

--------------------------------

### Sequence Diagram: Round Boxes (Over and On Sides)

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates how to create round-styled boxes, either enclosing one or multiple participants or placed to their left or right. Round boxes offer an alternative visual style for grouping elements.

```Sequence Diagram DSL
rbox over A:rbox over one
rbox over A,B:rbox over several
```

```Sequence Diagram DSL
rbox left of A:rbox left of
rbox right of A:rbox right of
```

--------------------------------

### Sequence Diagram: Parallel Fragment

Source: https://sequencediagram.org/instructions.html/instructions

Shows the basic 'par' fragment, used to define sections of a diagram where multiple message sequences occur concurrently.

```Sequence Diagram DSL
par info
A->C:info
A->B:info
end
```

--------------------------------

### Explicit Participant Creation Without Messages in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates how to create a participant explicitly using `create participantName` without an initiating message. It also shows how to add a note over the created participant.

```Sequence Diagram DSL
A->B:info
create C
note over C: C created without message
A<-C:info
```

--------------------------------

### Entry Spacing Control

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates how to adjust the spacing between entries (messages) in a sequence diagram. Spacing can be changed globally using '+' or '-' keys, or locally using 'entryspacing' statements with specific values like '0.1' for tight spacing or '3' for wider spacing.

```SequenceDiagramDSL
entryspacing 0.1
A->B:info
A->B:info
entryspacing 3
A->B:info
entryspacing 1
A->B:info
A->B:info
```

--------------------------------

### Automatic Word Wrapping for Text

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to enable automatic word wrapping for long text strings using the <wordwrap:chars> tag, specifying the character limit before wrapping. It also demonstrates interaction with manual newlines and alignment.

```Sequence Diagram DSL
note over A:info info info info <wordwrap:10>wrap10 info info info info info info <wordwrap:20>wrap20 info info\nmanual\nmanual\nmanual info info info info </wordwrap>info info info </wordwrap>info info info info info
==<wordwrap:1><align:center>info info info </wordwrap>info info info info</align>==
```

--------------------------------

### Sequence Diagram: Parallel Thread Fragment

Source: https://sequencediagram.org/instructions.html/instructions

Illustrates the 'par' fragment with nested 'thread' blocks. This allows for defining concurrent message flows that execute in parallel threads.

```Sequence Diagram DSL
par info
A->B:info1
thread test
A->B:info2
thread test
A->B:info2
end
```

--------------------------------

### Sequence Diagram: Notes (Over and On Sides)

Source: https://sequencediagram.org/instructions.html/instructions

This section demonstrates how to add textual notes to sequence diagrams, either spanning over one or multiple participants or positioned to their left or right. Notes can include multi-line text for detailed annotations.

```Sequence Diagram DSL
note over A:note over one\nmultiple lines\nof text
note over A,B:note over several
```

```Sequence Diagram DSL
note left of A:note left of
note right of A:note right of
```

--------------------------------

### Enabling and Disabling Automatic Activations in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section explains the `autoactivation on` and `autoactivation off` commands, which automatically manage participant activations on request messages and deactivations on response messages. It demonstrates how manual activations can still be combined with automatic mode.

```Sequence Diagram DSL
autoactivation on
A->B:info
B->C:info
B<-C:info
B-->C:info
B->B:info
deactivateafter B
B<--C:info
A<--B:info
autoactivation off
A->B:info
A<--B:info
```

--------------------------------

### Participant Activation with Self-Messages in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section illustrates how activations are managed when a participant sends a message to itself. It shows the activation and deactivation flow for recursive or internal calls, including the use of `deactivateafter`.

```Sequence Diagram DSL
activate Alice
Alice->Alice:privateMethod()
activate Alice
Alice<<--Alice:returnValue
deactivate Alice
Alice->Alice:privateMethod()
activate Alice
Alice<<--Alice:returnValue
deactivateafter Alice
```

--------------------------------

### Create Linear Message Flows

Source: https://sequencediagram.org/instructions.html/instructions

Explains how to make subsequent messages of the same type appear linearly in a sequence diagram using the 'linear' statement. It also shows how to disable linear message rendering with 'linear off'.

```Sequence Diagram DSL
linear
A->B:info
B->C:info
C->D:info
C<--D:info
B<--C:info
A<--B:info
A->>B:info
B->>C:info
linear off
C->>D:info
```

--------------------------------

### Set Active Color for Participant Activations

Source: https://sequencediagram.org/instructions.html/instructions

Explains how to define a default active color for all activations of a participant or globally for all participants using the 'activecolor' keyword. It also shows how specific activation colors override the default.

```Sequence Diagram DSL
participant B
participant C
participant D
activecolor #red
activecolor C #blue
activate B
B->C:info
activate C
C->>D:info
activate D
B<--C:info
deactivate C
deactivate B
B<-D:callback
activate C
deactivate D
activate B
B->D:info
deactivate B
B<-D:info
activate B #green
```

--------------------------------

### Participant Spacing Control

Source: https://sequencediagram.org/instructions.html/instructions

Demonstrates how to control the spacing between participants in a sequence diagram. The 'participantspacing equal' statement makes the spacing between all participants equal, while 'participantspacing 50' sets a minimum spacing of 50 units.

```SequenceDiagramDSL
participantspacing equal
participant A
participant B
participant C
A->B:info info info
```

--------------------------------

### Life Line Style Customization

Source: https://sequencediagram.org/instructions.html/instructions

Shows how to specify the style of life lines for participants in a sequence diagram. Styles can be applied globally or to specific participants, allowing control over color (e.g., '#red'), line weight (e.g., ':4'), and line type (e.g., ':solid', ':dashed').

```SequenceDiagramDSL
participant A
participant B
participant C
participant D
lifelinestyle #red:4:solid
lifelinestyle B #black:1:dashed
lifelinestyle C #gray:1:solid
lifelinestyle D ::dashed
A->B:info
B->C:info
C->D:info
```

--------------------------------

### Adding and Manipulating Dividers in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section details the process of adding, editing, moving, and deleting dividers in a sequence diagram. Dividers are used to visually separate sections of the diagram and can be customized with text and position.

```Sequence Diagram DSL
participant A
participant B
participant C
participant D
==info==
```

--------------------------------

### Silent Participant Destruction in Sequence Diagrams

Source: https://sequencediagram.org/instructions.html/instructions

This section illustrates the `destroysilent participantName` command, which destroys a participant at the previous entry's y position without rendering the destroy symbol, allowing for cleaner diagram layouts.

```Sequence Diagram DSL
A->>B:request
A<<--B:response
destroysilent B
destroysilent A
C->D: info
```
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