# ActionRule
**Source definition:** [`src/bitdrift/public/unary/workflows/v1/workflow.proto#L1292-L1321`]()
An action rule defines workflow output or side-effect behavior such as charts, session capture,
or tracing.
| Field | Type | Description |
|---|---|---|
| rule_id | string
between 1 and 100 chars | ID of this action rule. Must be unique within the workflow. Other APIs may refer to this ID, and some actions also reference it. For example, chart and flush actions can refer to the `rule_id` of a measure time action. |
| metric_chart_rule | [bitdrift.public.unary.workflows.v1.Rule.RuleMetricChartConfiguration](bitdrift_public_unary_workflows_v1_Rule.md "bitdrift.public.unary.workflows.v1.Rule.RuleMetricChartConfiguration")only one of metric_chart_rule, or flush_rule, funnel_rule, sankey_diagram_rule, measure_time_rule, start_tracing_rule can be set | Emits one or more time series that are rendered as a chart. |
| flush_rule | [bitdrift.public.unary.workflows.v1.Rule.RuleFlushConfiguration](bitdrift_public_unary_workflows_v1_Rule.md "bitdrift.public.unary.workflows.v1.Rule.RuleFlushConfiguration")only one of flush_rule, or metric_chart_rule, funnel_rule, sankey_diagram_rule, measure_time_rule, start_tracing_rule can be set | Triggers session capture by flushing buffered logs for the current session. |
| funnel_rule | [bitdrift.public.unary.workflows.v1.Rule.RuleFunnelConfiguration](bitdrift_public_unary_workflows_v1_Rule.md "bitdrift.public.unary.workflows.v1.Rule.RuleFunnelConfiguration")only one of funnel_rule, or metric_chart_rule, flush_rule, sankey_diagram_rule, measure_time_rule, start_tracing_rule can be set | Produces a funnel chart across ordered match rules in a single flow. |
| sankey_diagram_rule | [bitdrift.public.unary.workflows.v1.Rule.RuleSankeyDiagramConfiguration](bitdrift_public_unary_workflows_v1_Rule.md "bitdrift.public.unary.workflows.v1.Rule.RuleSankeyDiagramConfiguration")only one of sankey_diagram_rule, or metric_chart_rule, flush_rule, funnel_rule, measure_time_rule, start_tracing_rule can be set | Produces a Sankey diagram across match rules in a single flow. |
| measure_time_rule | [bitdrift.public.unary.workflows.v1.Rule.RuleMeasureTime](bitdrift_public_unary_workflows_v1_Rule.md "bitdrift.public.unary.workflows.v1.Rule.RuleMeasureTime")only one of measure_time_rule, or metric_chart_rule, flush_rule, funnel_rule, sankey_diagram_rule, start_tracing_rule can be set | Measures elapsed time between two match rules in a flow and can feed other actions. |
| start_tracing_rule | [bitdrift.public.unary.workflows.v1.RuleStartTracing](bitdrift_public_unary_workflows_v1_RuleStartTracing.md "bitdrift.public.unary.workflows.v1.RuleStartTracing")only one of start_tracing_rule, or metric_chart_rule, flush_rule, funnel_rule, sankey_diagram_rule, measure_time_rule can be set | Starts trace sampling for the current session when the referenced match rule fires. |
Example
```json
{
"metric_chart_rule": {
"time_series": [
{
"aggregated_id": "count/fkQ1PfAZhdYvJexzY6DYuoYCZTEaWO0Y7spxwjr7akc",
"rate": {
"denominator": {
"match_id": "_i1yUnHjKfmWpCaD5Tazo",
"name": "field_name"
},
"denominator_id": "fkQ1PfAZhdYvJexzY6DYuoYCZTEaWO0Y7spxwjr7akc",
"group_by": {
"values": [
{
"log_body": false
}
]
},
"numerator": {
"match_id": "_i1yUnHjKfmWpCaD5Tazo",
"name": "field_name"
},
"numerator_id": "fkQ1PfAZhdYvJexzY6DYuoYCZTEaWO0Y7spxwjr7akc"
},
"track_unique": {
"device_id": true
}
}
]
},
"rule_id": "_i1yUnHjKfmWpCaD5Tazo"
}
```