#Reference
The reference collects the terms Chester uses and what each one means, so any page can be read on its own.
#How the main terms relate
flowchart TD Proj[Project] --> Area[Process area] --> Grp[Process group] --> Proc[Process] Proc --> Dep[Deployment] --> Inst[Instance] Sys[System] --> Ad[Adapter] --> Act[Action] Sys --> Env[Environment] --> Cred[Credential] Proc -. "service task uses" .-> Act
See also Limits and Validation messages.
#Glossary
| Term | Meaning |
|---|---|
| Project | The top level of the process hierarchy. See Organise your work. |
| Process area | A topic inside a project that bundles process groups. |
| Process group | Groups related processes within a process area. |
| Process | One business process — master data, diagram, forms and versions. See Process master data. |
| Executable | A process Chester may run. Otherwise the process is documentation only. |
| Element | One shape in the diagram: an event, a task, a gateway. See Process elements. |
| Expression | A small piece of code that computes a value while the process runs. See Expressions. |
| Form | What a person fills in at the start or in a user task. See Forms. |
| System | An external application a process talks to. See Systems and adapters. |
| Adapter | How Chester connects to a system — REST, webhooks, GraphQL or email. |
| Action | One operation an adapter can perform, such as "fetch customer". |
| Environment | One installation of a system — development, test or production — with its own address. See Environments and credentials. |
| Credential | The secret an environment uses to sign in to a system. |
| Deployment | A frozen, runnable version of a process, to development or production. See Deploying a process. |
| Instance | One run of a deployed process. See Monitoring. |
| Agent | An AI model with tasks, tools and knowledge, run as a process. See Agents. |
| Knowledge vault | Notes an agent reads, and may write. See Agent knowledge vaults. |
| Catalog | The list of processes offered to a set of people in the Execution app. See Running processes. |
