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docs/syntax/architecture.md
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> **Warning**
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>
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> ## THIS IS AN AUTOGENERATED FILE. DO NOT EDIT.
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>
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> ## Please edit the corresponding file in [/packages/mermaid/src/docs/syntax/architecture.md](../../packages/mermaid/src/docs/syntax/architecture.md).
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# Architecture Diagrams Documentation (v\<MERMAID_RELEASE_VERSION>+)
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> In the context of mermaid-js, the architecture diagram is used to show the relationship between services and resources commonly found within the Cloud or CI/CD deployments. In an architecture diagram, services (nodes) are connected by edges. Related services can be placed within groups to better illustrate how they are organized.
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## Example
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```mermaid-example
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architecture-beta
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group api(cloud)[API]
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service db(database)[Database] in api
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service disk1(disk)[Storage] in api
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service disk2(disk)[Storage] in api
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service server(server)[Server] in api
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db:L -- R:server
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disk1:T -- B:server
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disk2:T -- B:db
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```
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```mermaid
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architecture-beta
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group api(cloud)[API]
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service db(database)[Database] in api
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service disk1(disk)[Storage] in api
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service disk2(disk)[Storage] in api
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service server(server)[Server] in api
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db:L -- R:server
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disk1:T -- B:server
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disk2:T -- B:db
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```
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## Syntax
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The building blocks of an architecture are `groups`, `services`, `edges`, and `junctions`.
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For supporting components, icons are declared by surrounding the icon name with `()`, while labels are declared by surrounding the text with `[]`.
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To begin an architecture diagram, use the keyword `architecture-beta`, followed by your groups, services, edges, and junctions. While each of the 3 building blocks can be declared in any order, care must be taken to ensure the identifier was previously declared by another component.
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### Groups
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The syntax for declaring a group is:
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```
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group {group id}({icon name})[{title}] (in {parent id})?
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```
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Put together:
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```
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group public_api(cloud)[Public API]
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```
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creates a group identified as `public_api`, uses the icon `cloud`, and has the label `Public API`.
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Additionally, groups can be placed within a group using the optional `in` keyword
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```
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group private_api(cloud)[Private API] in public_api
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```
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### Services
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The syntax for declaring a service is:
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```
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service {service id}({icon name})[{title}] (in {parent id})?
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```
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Put together:
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```
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service database(db)[Database]
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```
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creates the service identified as `database`, using the icon `db`, with the label `Database`.
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If the service belongs to a group, it can be placed inside it through the optional `in` keyword
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```
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service database(db)[Database] in private_api
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```
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### Edges
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The syntax for declaring an edge is:
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```
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{serviceId}{{group}}?:{T|B|L|R} {<}?--{>}? {T|B|L|R}:{serviceId}{{group}}?
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```
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#### Edge Direction
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The side of the service the edge comes out of is specified by adding a colon (`:`) to the side of the service connecting to the arrow and adding `L|R|T|B`
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For example:
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```
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db:R -- L:server
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```
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creates an edge between the services `db` and `server`, with the edge coming out of the right of `db` and the left of `server`.
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```
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db:T -- L:server
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```
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creates a 90 degree edge between the services `db` and `server`, with the edge coming out of the top of `db` and the left of `server`.
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#### Arrows
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Arrows can be added to each side of an edge by adding `<` before the direction on the left, and/or `>` after the direction on the right.
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For example:
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```
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subnet:R --> L:gateway
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```
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creates an edge with the arrow going into the `gateway` service
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#### Edges out of Groups
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To have an edge go from a group to another group or service within another group, the `{group}` modifier can be added after the `serviceId`.
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For example:
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```
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service server[Server] in groupOne
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service subnet[Subnet] in groupTwo
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server{group}:B --> T:subnet{group}
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```
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creates an edge going out of `groupOne`, adjacent to `server`, and into `groupTwo`, adjacent to `subnet`.
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It's important to note that `groupId`s cannot be used for specifying edges and the `{group}` modifier can only be used for services within a group.
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### Junctions
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Junctions are a special type of node which acts as a potential 4-way split between edges.
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The syntax for declaring a junction is:
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```
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junction {junction id} (in {parent id})?
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```
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```mermaid-example
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architecture-beta
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service left_disk(disk)[Disk]
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service top_disk(disk)[Disk]
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service bottom_disk(disk)[Disk]
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service top_gateway(internet)[Gateway]
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service bottom_gateway(internet)[Gateway]
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junction junctionCenter
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junction junctionRight
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left_disk:R -- L:junctionCenter
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top_disk:B -- T:junctionCenter
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bottom_disk:T -- B:junctionCenter
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junctionCenter:R -- L:junctionRight
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top_gateway:B -- T:junctionRight
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bottom_gateway:T -- B:junctionRight
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```
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```mermaid
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architecture-beta
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service left_disk(disk)[Disk]
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service top_disk(disk)[Disk]
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service bottom_disk(disk)[Disk]
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service top_gateway(internet)[Gateway]
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service bottom_gateway(internet)[Gateway]
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junction junctionCenter
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junction junctionRight
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left_disk:R -- L:junctionCenter
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top_disk:B -- T:junctionCenter
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bottom_disk:T -- B:junctionCenter
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junctionCenter:R -- L:junctionRight
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top_gateway:B -- T:junctionRight
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bottom_gateway:T -- B:junctionRight
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```
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## Configuration
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