| Agent (WME agent, daghandler) | Go service on every worker (port 8090) that receives DAG files, clones processor repositories and controls processor containers. |
| Airflow | Workflow scheduler that runs WME's generated DAGs using the CeleryExecutor. |
| Asset / Asset category | Generic catalogue objects; a worker is an asset of category Worker. |
| Celery queue | The queue a worker listens on (WORKER_NAME). Each processor's DAG task is sent to its worker's queue. |
| Compose application | Processor runtime mode: a Docker Compose app cloned from GitHub. |
| Data interface type | Template for a kind of endpoint (kafka, elasticsearch, …) with its connection parameters. |
| Data kind | Description of a payload: shape, cardinality and schema. |
| Derived environment variable | Variable injected into a processor from a connected resource: <INTERFACE>_<KEY>_<DIRECTION>. |
| Digital resource (DS / DR) | A concrete data source or sink — an interface type plus values. |
| Draft | A workflow proposed by the Workflow Assistant, reviewed and saved in the Lab. |
| Flower | Celery monitoring UI/API; WME imports workers from it. |
| Initialize Resources | Admin action that seeds a user's catalogue. |
| Logstash Pipeline | WME-managed processor type that generates a Logstash pipeline from its inputs, outputs and filter. |
| Observation | Normalized record of an event seen on a resource, stored in the observations index. |
| Orphan | A WME-labelled container (or Logstash pipeline) whose processor no longer exists. |
| Processor definition (PD) | Catalogue description of a processing component: runtime, interfaces, parameters. |
| Processor / processor manifest (PM) | An instance of a definition in a workflow, with a worker and values. |
| Processor orchestrator (PO) | Backend name for a workflow. |
| Provisioning | Cloning a Compose processor's repository onto every worker. |
| Single container | Processor runtime mode: one image run with docker run. |
| Teardown DAG | The second DAG generated per workflow; stops and removes its containers. |
| Worker | Host that runs processors: Celery worker + WME agent. |
| Worker Station | The worker a processor is assigned to. |
| Workflow | A graph of processors and resources with scheduling settings; deployed through Airflow. |
| Workflow template (WT) | Reusable graph for creating workflows. |