# System Metadata

While Algoreus Engram enables users to label entities with metadata attributes and tags, it also assigns system properties and tags to entities by default. These pre-set properties and tags can be accessed through the Algoreus Engram by adjusting the scope query parameter to system. 

The table below provides an overview of the system metadata annotations of Algoreus entities:

| Entity       | System Properties                                                                                                    | System Tags                                                                                        |
| ------------ | -------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------- |
| Artifacts    | Nodes (name and version)                                                                                             | Artifact name                                                                                      |
| Applications | Programs (name and type) included in the application                                                                 | Nodes                                                                                              |
| Nodes        | Schedules (name and summary), Application name, Artifact name                                                        | -                                                                                                  |
| Programs     | n/a                                                                                                                  | Program name and type, Program mode (batch or real-time), Workflow node names (only for workflows) |
| Datasets     | Schema (field names and types), Dataset type (FileSet, Table, KeyValueTable, etc.), TTL (Time To Live), Dataset name | batch (for Datasets accessible through MapReduce or Spark programs)                                |

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